CN114313126A - Prefabricated FRP concrete composite cable tower platform system and its construction method - Google Patents

Abstract

A prefabricated FRP concrete composite cable tower platform system and a construction method thereof relate to the technical field of construction equipment. A square foundation, several upper module monomers and several lower module monomers are assembled through FRP integral nodes, ring dampers, FRP concrete composite columns, FRP concrete composite diagonal braces and FRP concrete composite cross braces to form a rigid connection system. The upper structure and the lower structure; the upper platform structure is connected with the upper structure through the upper-lower structure connecting structure, the upper structure is connected with the lower structure through the layered connecting member, and the lower structure is connected with the independent square foundation through the lower structure-foundation connecting member. The assembled FRP concrete combined stay cable tower platform system and its construction method are simple in construction, high in assembly efficiency, strong in corrosion resistance, good in energy dissipation and shock absorption, and can be reused.

Description

Prefabricated FRP concrete composite cable tower platform system and its construction method

Technical field:

The invention relates to the technical field of construction equipment, in particular to an assembled FRP concrete composite cable tower platform system and a construction method thereof.

Background technique:

The working water area of the cable tower type offshore platform is 240m to 1000m, which belongs to the deep-water offshore platform. Compared with the jacket platform, it has a simple structure and relatively small component size, and has strong adaptability to various environmental loads. Because the working waters are mostly deep sea, the environment is relatively harsh, and the platform components have relatively strict requirements on strength, stiffness, stability, and corrosion resistance. Therefore, the cable tower type offshore platform has high construction costs and is difficult to design, construct and install. Features. Under the background of the long-term surplus of deepwater drilling resources, the high construction and construction costs make this type of platform not widely used.

Invention content:

The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide a new type of assembled FRP concrete combination with simple construction, high assembly efficiency, strong corrosion resistance, good energy dissipation and shock absorption, and reusability Strap tower platform structure system and construction method thereof.

In order to solve the problems existing in the background technology, the present invention adopts the following technical solutions: including an upper platform structure, several upper module monomers, layered connectors, several lower module monomers and an independent square foundation, several upper module monomers The body and several lower module monomers are respectively assembled by FRP integral nodes, ring dampers, FRP concrete composite columns, FRP concrete composite diagonal braces and FRP concrete composite cross braces to form the upper and lower layers of the rigid-connected system; the The upper platform structure is connected with the upper structure through the upper-lower structure connecting structure, the upper structure is connected with the lower structure through the layered connecting member, and the lower structure is connected with the independent square foundation through the lower structure-foundation connecting member.

The FRP integral node includes a vertical half-pipe, an oblique half-pipe, and a horizontal half-pipe. The top and bottom of the vertical half-pipe are respectively connected with the inner pipe through a ring damper. The outer wall of the plate is provided with high-strength bolts, which are connected with the FRP concrete composite column, the inner pipe is inserted into the FRP concrete composite column, and the end of the FRP concrete composite column is provided with connecting ears; Half pipes, diagonal half pipes and transverse half pipes are respectively connected with FRP concrete composite diagonal braces and FRP concrete composite cross braces.

The layered connection member includes a C-type sleeve, a C-type sleeve and a hydraulic fixer. The C-type sleeve is connected with the C-type sleeve II through the hydraulic fixer. The lower part of the second sleeve is respectively connected with the inner pipe through the ring damper, the outer wall of the inner pipe is provided with a backing plate, the outer wall of the backing plate is provided with high-strength bolts, the high-strength bolts are connected with the FRP concrete composite column, and the inner tube is inserted into the FRP concrete composite column. The end of the concrete composite column 5 is provided with a connecting lug 17; one side wall of the C-shaped sleeve is provided with an oblique half-pipe and a transverse half-pipe, and the oblique half-pipe and the transverse half-pipe are respectively combined with FRP concrete. Concrete composite cross braces are connected, the bottom of the C-type sleeve is a FRP inner pipe with a conical head; the second C-type sleeve is provided with a rubber cushion, and the outer wall of the second C-type sleeve is provided with an oblique half pipe and a transverse half pipe , the diagonal half-pipe and the transverse half-pipe are respectively connected with the FRP concrete composite diagonal bracing and the FRP concrete composite horizontal bracing.

The first C-shaped sleeve and the second C-shaped sleeve are assembled by several basic truss units, ring dampers and FRP integral nodes.

The lower structure-foundation connecting member includes a connecting sleeve, the FRP inner tube with a conical head provided at the bottom of the lower structure is inserted into the connecting sleeve, and the connecting sleeve is fixed on an independent square foundation, which includes a concrete base and a steel plate. The base plate, the four-circle outer wall of the concrete base is provided with a steel plate base plate.

The upper platform structure includes a plurality of column leg connection ports, platform uprights and platform cross braces, the platform cross braces are arranged on the platform upright pillars in a staggered manner, the column leg connection port is provided with the platform cross brace intersection, and the column leg connection port is connected to the FRP. Concrete composite columns are connected, and stiffeners are provided at the connection ports of the column legs.

The FRP concrete composite column, the FRP concrete composite diagonal bracing and the FRP concrete composite horizontal bracing are respectively divided into three forms. The order is the core concrete, the steel pipe, the sandwich concrete and the FRP pipe, and the third form is the steel pipe, the sandwich concrete and the FRP pipe from the inside out.

The construction method of the FRP concrete composite structure column is to first wrap the steel pipe with the outer seamless winding FRP pipe, then fix the inner pipe with the radius of the inner wall of the steel pipe through the horizontal high-strength bolts at both ends of the steel pipe, and extend the designed length. The lower inner pipe port of the steel pipe is sealed, the top of the upper inner pipe is provided with a pouring port, and the self-compacting concrete is poured into the FRP steel pipe. The height of the concrete poured in the FRP steel pipe is the same as the top of the inner pipe. Ear; the FRP concrete composite cross brace construction method, first wrap the steel pipe with the outer seamless winding FRP pipe, and then extend the design length through the inner pipe of the horizontal high-strength bolt radius at both ends of the steel pipe with the radius of the inner wall of the steel pipe, The inner pipe port at one end of the steel pipe is sealed, and the top of the inner pipe at the other end is provided with a pouring port. Self-compacting concrete is poured into the FRP steel pipe. The height of the concrete poured in the FRP steel pipe is the same as the top of the inner pipe. Connecting ears; the construction method of the described FRP integral joint, firstly design a multi-plane joint according to the design requirements, wrap the outer wall of the multi-plane joint with the outer seamless winding FRP pipe, the vertical half pipe of the single joint, the horizontal The end of the half-pipe and the inclined half-pipe is reserved for embedding space and sealed, and the connecting lugs are welded on the end face of the half-pipe. Finally, self-compacting concrete is poured into the pouring hole to fill the inner space of the multi-plane joint.

The construction method of the lower structure is as follows: firstly, the factory prefabricated FRP concrete trusses and FRP concrete columns are inserted into the ring dampers, connected to the FRP integral multi-plane nodes, connected and fixed by high-strength bolts, and formed into a basic truss unit structure, Use 5 to 6 basic truss units to form the layered module monomer of the truss; then weld a C-type sleeve 2 on the upper end of each set layered module monomer column, and place a rubber gasket inside the C-type sleeve 2 ; Weld a C-shaped sleeve at the lower end of each set layered module single column, and install and fix the hydraulic fixer on the side wall of the column through high-strength bolts; the upper end face of the layered module single column on the top layer of the truss layer forms a belt Bolt holes are connected to the ear and the inner pipe extending out of the design length, and self-compacting concrete is poured into the inner pipe, and the concrete height is level with the top of the inner pipe; Weld the inner pipe with the conical head of the designed length, and pour the self-compacting concrete into the inner pipe until the inner pipe with the conical head is filled; the construction method of the superstructure is to first install the factory prefabricated FRP concrete truss and FRP concrete column sleeves. The ring-in damper is connected to the FRP integral multi-plane node, which is connected and fixed by high-strength bolts to form a truss platform structure; the bottom of the truss platform is welded with the column leg connection port according to the design requirements.

First, excavate the oil production site to the corresponding depth and level it, place the formwork and pour the square freestanding foundation. The upper part of the foundation is provided with a steel base plate with a connecting sleeve; after the foundation is formed, the factory prefabricated truss layered module single The bodies are arranged in order and transported to the corresponding location at sea; secondly, the single length layered module of the bottom layer in the truss layered is sunk to the specified position, and the inner tube with the tapered head at the lower end of the bottom layer module is connected with the four connecting sleeves of the square independent foundation. , tighten the high-strength bolts on the connecting ears through the underwater robot; then immerse the layered modules into the water in turn, and connect the inner tube with the tapered head at the lower end of the upper module to the C-shaped sleeve of the lower module completely. The interface is compacted by the hydraulic fixture and the high-strength bolts on the connecting ears are tightened by the underwater robot; when the single layer module is assembled to the top module, the mooring cable is tied at the mooring cable connection, and the mooring cable is fastened. The mooring weight at the lower end is placed at the design position to form a fixed effect on the tower structure; finally, the upper structure is lifted, and the connection port of the lower column leg of the platform is connected with the inner pipe of the top module of the lower structure, and connected by high-strength bolts on the connecting ears And welded fixed.

The advantages of the present invention are:

1. The present invention applies the FRP concrete structure in the field of offshore platforms. The FRP layer greatly improves the corrosion resistance of the platform structure, reduces the later maintenance cost of the components and prolongs the life of the structure; the steel tube layer restrains and deforms the inner layer concrete, Give full play to the role of concrete strength; the concrete layer in the component improves the overall rigidity of the structure and reduces the deformation of the lower truss structure under the action of underwater loads.

2. By setting the annular damper, the deformation performance of the truss and the column under the load has been improved, and at the same time, the durability of the use of the rod has been improved, and the overall energy dissipation and shock absorption capacity of the structure has been improved.

3. In the present invention, the connection method of the assembled FRP composite cable tower platform structure system is connected by factory-prefabricated integral nodes to connect the column and truss, and the cable tower is simplified by the nested connection of inner pipes and the connection and fixation of high-strength bolts. The construction technology of the type platform structure system; the inner pipe resists the shear force at the joint, and the high-strength bolt resists the tensile force, which meets the strength and deformation requirements of the structure; during the offshore construction, the single layered module can be lifted and constructed simply and quickly, and the Assembling and docking in sequence, using underwater robots to tighten the screws, the construction process of sequential docking is simple, time-consuming, and pollution-free; when the platform needs to be disassembled, it is only necessary to disassemble and transport the layered modules in sequence, and then transfer them to other destinations. After the foundation is poured and formed, it can be directly installed, and the platform structure can be disassembled and assembled at any time, which has the effect of reuse and cost reduction.

Description of drawings:

Fig. 1 is the structure schematic diagram of the present invention

Figure 2 is a schematic cross-sectional view of an integral joint in the present invention;

3 is a schematic cross-sectional view of a layered connection node of the underlying structure of the present invention;

4 is a schematic diagram of a layered module monomer of the present invention;

Fig. 5 is the connection schematic diagram of the lower structure layered module of the present invention;

Fig. 6 is the substructure of the present invention-basic connection node sectional schematic diagram;

7 is a schematic diagram of a freestanding square foundation of the present invention;

Fig. 8 is the substructure of the present invention - basic connection schematic diagram;

Fig. 9 is the structure schematic diagram of the upper platform of the present invention;

Fig. 10 is the bottom schematic diagram of the upper platform of the present invention;

Fig. 11 is the top schematic diagram of the top module of the present invention

12 is a schematic diagram of the damper and high-strength bolt backing plate of the present invention;

13 is a schematic diagram of a layered module monomer connection member of the present invention;

Figure 14 is a schematic diagram of the FRP concrete structure of the present invention.

Description of reference numerals: 1 upper platform structure, 2 upper-substructure connection structure, 3FRP integral joint, 4FRP concrete composite cross brace, 5FRP concrete composite column, 6 layered connecting member, 7FRP concrete composite diagonal brace, 8 annular damper , 9 substructure - foundation connecting member, 10 connecting sleeve, 11 independent square foundation, 12 mooring rope, 13 mooring weight, 14 backing plate, 15 high-strength bolt, 16 inner pipe, 17 connecting ear, 18 bolt hole, 19 vertical half pipe, 20 inclined half pipe, 21 transverse half pipe, 22FRP inner pipe with tapered head, 23C type sleeve one, 24 hydraulic fixer, 25 rubber cushion, 26C type sleeve two, 27 basic truss unit , 28 upper module monomer, 29 lower module monomer, 30 steel plate foundation plate, 31 concrete base, 32 mooring cable connection, 33 column leg connection port, 34 platform column, 35 platform cross brace, 36 platform node, 37 stiffening Rib, 38 sandwich concrete, 39FRP outer layer, 40 core concrete, 41FRP pipe, 42 steel pipe

Detailed ways:

Referring to each figure, the present invention specifically adopts the following embodiments: including an upper platform structure 1, several upper module units 28, layered connectors 6, several lower module units 29 and an independent square foundation 11, several upper module units The body 28 and several lower-level module monomers 29 are respectively assembled through the FRP integral node 3, the ring damper 8, the FRP concrete composite column 5, the FRP concrete composite diagonal brace 7 and the FRP concrete composite cross brace 4 to form the upper layer of the rigid connection system. Structure and substructure; the upper platform structure 1 is connected with the superstructure through the upper-lower structure connecting structure 2, the upper structure is connected with the lower structure through the layered connecting member 6, and the lower structure is connected with the independent square through the lower structure-basic connecting member 9 Base 11 connections. The FRP integral node 3 includes a vertical half-pipe 19, an oblique half-pipe 20, and a transverse half-pipe 21. The top and bottom of the vertical half-pipe 19 are respectively connected to the inner pipe 16 through the ring damper 8. 16 The outer wall is provided with a backing plate 14, the outer wall of the backing plate 14 is provided with high-strength bolts 15, the high-strength bolts 15 are connected with the FRP concrete composite column 5, the inner pipe 16 is inserted into the FRP concrete composite column 5, and the end of the FRP concrete composite column 5 is provided with a connection Ear (17); vertical half-pipe 19 side wall is provided with inclined half-pipe 20 and transverse half-pipe 21, inclined half-pipe 20 and transverse half-pipe 21 are respectively combined with FRP concrete diagonal brace 7 and FRP concrete combined cross brace 4 connect. The layered connection member 6 includes a C-type sleeve 1 23, a C-type sleeve 2 26 and a hydraulic fixture 24. The C-type sleeve 1 23 is connected to the C-type sleeve 2 26 through the hydraulic fixture 24, and the C-type sleeve is connected. The upper part of the sleeve 1 23 and the lower part of the C-shaped sleeve 26 are respectively connected with the inner pipe 16 through the ring damper 8. The outer wall of the inner pipe 16 is provided with a backing plate 14, and the outer wall of the backing plate 14 is provided with high-strength bolts 15. The high-strength bolts 15 and The FRP concrete composite column 5 is connected, the inner pipe 16 is inserted into the FRP concrete composite column 5, and the end of the FRP concrete composite column 5 is provided with connecting ears 17; The transverse half-pipe 21, the oblique half-pipe 20 and the transverse half-pipe 21 are respectively connected with the FRP concrete composite diagonal brace 7 and the FRP concrete composite cross brace 4, and the bottom of the C-shaped sleeve-23 is the FRP tapered inner pipe 22; the described The second C-shaped sleeve 26 is provided with a rubber cushion 25, and the outer wall of the second C-shaped sleeve 26 is provided with an oblique half-pipe 20 and a transverse half-pipe 21. The oblique half-pipe 20 and the transverse half-pipe 21 are respectively combined with FRP concrete and inclined The brace 7 is connected with the FRP concrete composite cross brace 4. The first C-shaped sleeve 23 and the second C-shaped sleeve 26 are assembled by several basic truss units 27 , ring dampers 8 and FRP integral nodes 3 . The lower structure-basic connecting member 9 includes a connecting sleeve 10, the FRP inner tube 22 with a tapered head provided at the bottom of the lower structure is inserted into the connecting sleeve 10, and the connecting sleeve 10 is fixed on the independent square foundation 11, and the independent square The foundation 11 includes a concrete base 31 and a steel base plate 30 , and the four outer walls of the concrete base 31 are provided with a steel base plate 30 . The upper platform structure 1 includes a plurality of column leg connecting ports 33, platform uprights 34 and platform cross braces 35, the platform cross braces 35 are arranged on the platform upright pillars 34 in a staggered manner, and the column leg connection ports are provided with the intersection of the platform cross braces 35. , the column leg connection port 33 is connected with the FRP concrete composite column 5, and the column leg connection port 33 is provided with a stiffening rib 37. The FRP concrete composite column 5, the FRP concrete composite diagonal brace 7 and the FRP concrete composite cross brace 4 are respectively divided into three forms, the form one is the core concrete 40, the steel pipe 42 and the FRP pipe 41 in turn from the inside to the outside. The second is the core concrete 40, the steel pipe 42, the interlayer concrete 38 and the FRP pipe 41 from the inside and the outside, and the third is the steel pipe 42, the sandwich concrete 38 and the FRP pipe 41 from the inside and the outside. The construction method of the described FRP concrete composite structure column 5 is to first wrap the steel pipe 42 with the outer seamless winding FRP pipe 41, then fix the inner pipe with the radius of the inner wall of the steel pipe through the horizontal high-strength bolts at both ends of the steel pipe, and extend it. Design length, the lower inner pipe port of the steel pipe is sealed, the top of the upper inner pipe is provided with a pouring port, and the self-compacting concrete is poured into the FRP steel pipe. The height of the concrete poured in the FRP steel pipe is the same as the top of the inner pipe. The end face welding connection ear; the construction method of the described FRP concrete composite cross brace 4, first wraps the steel pipe 42 with the outer seamless winding FRP pipe 41, and then passes the horizontal high-strength bolts at both ends of the steel pipe. The inner pipe with the radius of the inner wall of the steel pipe , stretch out the design length, one end of the steel pipe is sealed with the inner pipe port, and the top of the inner pipe at the other end is provided with a pouring port, and self-compacting concrete is poured into the FRP steel pipe. The height of the concrete poured in the FRP steel pipe is the same as the top of the inner pipe. , Weld the connecting ears on both ends of the steel pipe; the construction method of the FRP integral node 3, first design a multi-plane node according to the design requirements, wrap the outer wall of the multi-plane node with the outer layer of seamless winding FRP pipe, and the single node The vertical half-pipe, the horizontal half-pipe, and the oblique half-pipe end are reserved for embedding space and sealed, and the connecting ears are welded on the end face of the half-pipe. Finally, self-compacting concrete is poured into the pouring hole to fill the inner space of the multi-plane joint. The construction method of the lower structure is as follows: firstly, the factory prefabricated FRP concrete trusses and FRP concrete columns are inserted into the ring dampers, connected to the FRP integral multi-plane nodes, connected and fixed by high-strength bolts, and formed into a basic truss unit structure, Use 5 to 6 basic truss units to form the layered module monomer of the truss; then weld a C-type sleeve 2 on the upper end of each set layered module monomer column, and place a rubber gasket inside the C-type sleeve 2 ; Weld a C-shaped sleeve at the lower end of each set layered module single column, and install and fix the hydraulic fixer on the side wall of the column through high-strength bolts; the upper end face of the layered module single column on the top layer of the truss layer forms a belt Bolt holes are connected to the ear and the inner pipe extending out of the design length, and self-compacting concrete is poured into the inner pipe, and the concrete height is level with the top of the inner pipe; Weld the inner pipe with the conical head of the designed length, and pour the self-compacting concrete into the inner pipe until the inner pipe with the conical head is filled; the construction method of the superstructure is to first install the factory prefabricated FRP concrete truss and FRP concrete column sleeves. The ring-in damper is connected to the FRP integral multi-plane node, which is connected and fixed by high-strength bolts to form a truss platform structure; the bottom of the truss platform is welded with the column leg connection port according to the design requirements. First, excavate the oil production site to the corresponding depth and level it, place the formwork and pour the square freestanding foundation. The upper part of the foundation is provided with a steel base plate with a connecting sleeve; after the foundation is formed, the factory prefabricated truss layered module single The bodies are arranged in order and transported to the corresponding location at sea; secondly, the single length layered module of the bottom layer in the truss layered is sunk to the specified position, and the inner tube with the tapered head at the lower end of the bottom layer module is connected with the four connecting sleeves of the square independent foundation. , tighten the high-strength bolts on the connecting ears through the underwater robot; then immerse the layered modules into the water in turn, and connect the inner tube with the tapered head at the lower end of the upper module to the C-shaped sleeve of the lower module completely. The interface is compacted by the hydraulic fixture and the high-strength bolts on the connecting ears are tightened by the underwater robot; when the single layered module is assembled to the top module, the mooring line 12 is fastened at the mooring line connection 32, and the tie The mooring weight 13 at the lower end of the mooring cable 12 is placed at the design position to form a fixed effect on the tower structure; finally, the upper structure is lifted, and the connection port of the lower column leg of the platform is connected with the inner pipe of the top module of the lower structure, and the upper structure is connected through the connecting lugs. The high-strength bolts are connected and welded.

This new type of prefabricated FRP concrete composite cable tower platform structure system is composed of prefabricated FRP concrete composite columns, FRP concrete composite trusses, and FRP integral multi-plane nodes. The upper platform of the fabricated FRP concrete composite cable tower platform platform The structure is a two-story multi-row FRP concrete composite truss structure, and the lower truss structure part of the assembled FRP concrete composite cable tower platform is a tower structure with a square section; among them, the FRP concrete composite column and the FRP concrete composite truss end Connecting ears with bolt holes are formed, and the inner tube at the end extends through the ring damper and then is embedded in the node half-pipe and connected and fixed by high-strength bolts; the integral multi-plane node is intersected by the horizontal half-pipe, the vertical half-pipe and the oblique half-pipe The extension end face of the half-pipe forms connecting ears with bolt holes; the lower truss structure is composed of multiple layered module monomers, and the upper layer-lower layer module monomers are connected by truss layered connecting members and connected by longitudinal high-strength bolts.

In the above scheme, the FRP concrete composite structure is composed of FRP pipe, steel pipe and core concrete; it is composed of FRP pipe, interlayer concrete, steel pipe and core concrete; it is composed of FRP pipe, interlayer concrete and steel pipe. Among them, in the FRP concrete composite structure, the outer layer of FRP can prevent the steel pipe and concrete in the inner layer of the rod from being corroded by seawater; the steel pipe and the FRP layer can constrain the deformation of the concrete layer; the concrete layer can greatly improve the rigidity and strength of the rod structure. effect.

The half-pipe of the integral joint described in the above scheme reserves the space for the inner pipe to be nested; the extending end face of the half-pipe of the integral joint forms connecting ears and is provided with bolt holes; the cross-sectional radius of the inner pipe is a single The radius of the inner wall of the body node half-pipe.

In the above scheme, the FRP CFST composite column combined with the ring damper and the FRP CFST truss combined with the ring damper are provided with prefabricated inner tubes at their ends, which are fixed by the lateral high-strength bolts on the side walls. It is the inner wall radius of the FRP concrete-filled steel tubular composite column and the FRP concrete-filled steel tubular truss combined with the ring damper. The inner pipe penetrates the ring damper and is embedded in the single node half pipe, which is fixed and connected by high-strength bolts.

The lower structure tower structure in the above scheme is composed of a plurality of truss layered modules, wherein 5 to 6 basic truss units are connected to form a layered module monomer with a height of 30 meters. The layered module monomer is easy to hoist and construct, and can be quickly hoisted and docked to fix the underwater structure when assembled at sea.

In the above scheme, the truss layered module connecting member is composed of a hydraulic fixture, a C-type sleeve 1, a C-type sleeve 2, a rubber gasket, a FRP concrete inner pipe with a conical head, and high-strength bolts. The C-type sleeve 1, The C-shaped sleeves 2 are welded and fixed to the two ends of the columns of the upper and lower trusses respectively. The side walls of the upper truss layered single column are provided with hydraulic fixers, and the FRP inner pipe with a conical head protrudes from the bottom. The lower truss layered single column The top of the vertical column is provided with a rubber gasket, which has a sealing effect on the connecting section of the vertical column and mitigates the adverse impact of the impact; the truss structure of the upper-lower layered module is nested and connected with inner tubes and compacted by hydraulic fasteners, and then passed through the longitudinal high-strength truss structure. Bolted connection.

The upper structure-lower structure connection part of the above scheme is composed of a column leg connection port, a stiffening rib, a connecting ear, and an inner tube. The radius of the inner tube is the radius of the inner wall of the column leg connection port, and the stiffeners are distributed along the outer wall of the column leg connection port in a cross shape. , the connecting part is nested in the inner tube and fixed by longitudinal high-strength bolts.

The substructure-foundation connection part described in the above scheme is composed of a square freestanding foundation with a connecting sleeve and a FRP concrete inner pipe with a conical head, which are connected in a nested manner, and then fixed by longitudinal high-strength bolts.

The construction method of the prefabricated FRP concrete composite cable tower platform structure described in the above scheme:

The construction method of the prefabricated column of the FRP concrete composite structure: first wrap the steel pipe with the outer layer of seamless winding FRP pipe, then set the inner pipe with the radius of the inner wall of the steel pipe at both ends of the steel pipe, extend the design length, and pass the side wall of the steel pipe. The horizontal high-strength bolts are fixed. The lower inner pipe port of the steel pipe is sealed, the top of the upper inner pipe is provided with a pouring port, and the self-compacting concrete is poured into the FRP steel pipe. The height of the concrete poured in the FRP steel pipe is the same as the top of the inner pipe. Ear; the construction method of the prefabricated truss bracing of the FRP concrete composite structure, first wrap the steel pipe with the outer seamless winding FRP pipe, then set the inner pipe with the radius of the inner wall of the steel pipe at both ends of the steel pipe, and extend the design length , and is fixed by horizontal high-strength bolts on the sidewall of the steel pipe. The inner pipe port at one end of the steel pipe is sealed, and the top of the inner pipe at the other end is provided with a pouring port. Self-compacting concrete is poured into the FRP steel pipe. The height of the concrete poured in the FRP steel pipe is the same as the top of the inner pipe. Connect the ear.

The construction method of the prefabricated integral multi-plane joint of the FRP concrete composite structure: first, design the multi-plane joint according to the design requirements, wrap the outer wall of the multi-plane joint with the outer layer of seamless winding FRP pipe, and the vertical half-pipe, The end of the transverse half-pipe and the oblique half-pipe reserve an embedded space and seal it, and weld connecting ears on the end face of the half-pipe. Finally, self-compacting concrete is poured into the pour hole until the interior space of the multiplanar node is filled.

The construction method of the superstructure of the prefabricated FRP composite cable tower platform structure: first, the factory prefabricated FRP concrete trusses and FRP concrete columns are sleeved into the ring damper, and the FRP integral multi-plane nodes are connected and fixed by high-strength bolts. , and form a truss platform structure; the bottom of the truss platform is welded with the column leg connection port according to the design requirements.

The construction method of the prefabricated FRP combined cable tower platform structure system: excavate the oil production site to the corresponding depth and level it, place the formwork and pour the square independent foundation, in which the upper part is set with a steel foundation plate with a connecting sleeve. After the foundation is formed, the prefabricated truss layered module monomers are arranged in order. First, the bottom layer length layered module monomers in the truss layering are sunk to the specified position. The lower end of the bottom layer module has a tapered inner tube and a square independent foundation. After the four connecting sleeves are butted, the high-strength bolts on the connecting ears are tightened by the underwater robot; then the layered module monomers are immersed in the water in turn, and the inner tube with the conical head at the lower end of the upper layered layered module monomer is separated from the lower layer. The C-shaped sleeves of the single layer module are completely butted, and the interface is compacted by the hydraulic fixture and the high-strength bolts on the connecting ears are tightened by the underwater robot; when the single layer module is assembled to the top module, the mooring cable is connected Mooring ropes are fastened at the place, and the mooring weights at the lower end of the mooring ropes are placed at the design position to form a fixed effect on the tower structure; finally, the upper structure is hoisted, and the connection port of the lower column legs of the platform is connected to the top module of the lower structure. The inner pipes are butted, connected and fixed by welding with high-strength bolts on the connecting ears.

Example 1:

As shown in Figure 2 and Figure 14, this new type of prefabricated FRP concrete composite cable tower platform structure system is composed of prefabricated FRP concrete composite columns, FRP concrete composite trusses, and FRP integral multi-planar nodes. The node is composed of the intersection of the horizontal half-pipe, the vertical half-pipe and the oblique half-pipe. The extending end face forms the connecting ear, and the connecting ear has bolt holes; the FRP concrete composite column and the FRP concrete composite truss end form the connecting ear with bolt holes, The inner tube extending at the end penetrates the ring damper and then is embedded in the node half tube and fixed by high-strength bolts. As shown in FIG. 8 , the nodes of the upper structural components are assembled and formed in the above-mentioned manner.

The construction method in this embodiment:

The construction method of prefabricated integral multi-plane joints is to first design multi-plane joints according to the design requirements. Reserve an embedded space for the end of the half-pipe and seal it, and weld the connection lugs on the end of the half-pipe. Finally, pour concrete into the pouring hole to fill the inner space of the multi-plane joint;

The construction method of the prefabricated column of the FRP concrete composite structure: first wrap the steel pipe with the outer layer of seamless winding FRP pipe, then set the inner pipe with the radius of the inner wall of the steel pipe at both ends of the steel pipe, extend the design length, and pass through the side wall of the steel pipe. The horizontal high-strength bolts and the inner and outer steel plates are connected and fixed, the inner pipe port at the lower part of the steel pipe is sealed, and the top of the upper inner pipe is provided with a pouring port, and self-compacting concrete is poured into the FRP steel pipe. After the concrete is formed, the connecting ears are welded on both ends of the steel pipe;

The construction method of the prefabricated truss of the described FRP concrete composite structure, first wraps the steel pipe with the outer seamless winding FRP pipe, then sets the inner pipe with the radius of the inner wall of the steel pipe at both ends of the steel pipe, extends the design length, and passes through the steel pipe. The horizontal high-strength bolts on the side wall of the steel pipe and the inner and outer steel plates are connected and fixed. The inner pipe port at one end of the steel pipe is sealed, and the top of the inner pipe at the other end is provided with a pouring port. Self-compacting concrete is poured into the FRP steel pipe. The top is flat, and after the concrete is formed, the connecting ears are welded on both ends of the steel pipe.

Example 2:

As shown in Figure 3, Figure 4, Figure 5, Figure 13, the lower tower structure is composed of multiple truss layered modules, of which 5 to 6 basic truss units are connected to form a layered module monomer with a height of 30 meters . The connection components of the substructure truss layered module monomer are composed of hydraulic fixtures, C-type sleeves 1, C-type sleeves 2, rubber gaskets, FRP concrete inner pipes with conical heads, and high-strength bolts. C-type sleeves 1, The C-type sleeves 2 are welded and fixed to the two ends of the upper and lower truss columns respectively. The side walls of the upper truss columns are provided with hydraulic fixers, the bottom is welded with a FRP inner tube with a conical head, and the top of the lower truss column is provided with rubber gaskets.

The construction method in this embodiment:

First, the factory prefabricated FRP concrete trusses and FRP concrete columns are inserted into the ring damper, connected to the FRP integral multi-plane nodes, connected and fixed by high-strength bolts to form a basic truss unit, of which 5 to 6 basic truss units constitute a The truss layered module monomer; then weld the C-type sleeve 2 on the upper end of each set single-layer module column, place a rubber gasket inside the C-type sleeve 2, and weld the C-type sleeve 1 at the lower end of the column, and The hydraulic fixer is fixed on the side wall of the column by high-strength bolts, and the inner tube of the upper-lower module monolithic structure is nested and connected and compacted by the hydraulic fixer, and then fixed by longitudinal high-strength bolts.

Example 3:

As shown in Figure 6, Figure 7, Figure 8, the lower structure-foundation connection part is composed of a square freestanding foundation with a connecting sleeve and a FRP concrete inner pipe with a conical head. The inner pipe is nested and connected, and fixed by longitudinal high-strength bolts. .

The construction method in this embodiment:

The lower end surface of the bottom-level module column in the substructure is layered to form connecting ears with bolt holes and a FRP inner tube with a tapered head of welding design length, and then pour concrete into the inner tube until the inner tube with a tapered head is filled; when working underwater, the bottom layer After the inner tube with the conical head at the lower end of the module is butted with the four connecting sleeves of the square independent foundation, the high-strength bolts on the connecting ears are tightened by the underwater robot.

Example 4:

As shown in Figure 9, Figure 10 and Figure 11, the upper platform structure of the assembled FRP composite stay-cable tower platform structure consists of prefabricated FRP concrete trusses and FRP concrete columns, which are sleeved into ring dampers, and connected to the FRP integral multi-plane It consists of nodes, which are connected and fixed by high-strength bolts to form a truss platform structure; the bottom of the truss platform is welded with column leg connection ports according to design requirements; among them, the upper platform structure-lower truss structure connection part consists of column leg connection ports, stiffeners, connecting ears, inner It is composed of tubes, which are connected by nesting of inner tubes, and then fixed by longitudinal high-strength bolts.

Example 5:

Figure 1 is an overall schematic diagram of the assembled FRP composite stay-tower-type platform structure. The structural system includes an upper platform structure part and a lower truss structure part.

The construction method in this embodiment:

The oil production site is excavated to the corresponding depth and leveled, and the formwork is placed and a square independent foundation is poured. The upper part is provided with a steel foundation plate with a connecting sleeve. After the foundation is formed, the prefabricated truss layered module monomers are arranged in order. First, the bottom layer length layered module monomers in the truss layering are sunk to the specified position. The lower end of the bottom layer module has a tapered inner tube and a square independent foundation. After the four connecting sleeves are butted, the high-strength bolts on the connecting ears are tightened by the underwater robot; then the layered module monomers are immersed in the water in turn, and the inner tube with the conical head at the lower end of the upper layered layered module monomer is separated from the lower layer. The C-shaped sleeves of the single layer module are completely butted, and the interface is compacted by the hydraulic fixture and the high-strength bolts on the connecting ears are tightened by the underwater robot; when the single layer module is assembled to the top module, the mooring cable is connected Mooring ropes are fastened at the place, and the mooring weights at the lower end of the mooring ropes are placed at the design position to form a fixed effect on the tower structure; finally, the upper structure is hoisted, and the connection port of the lower column legs of the platform is connected to the top module of the lower structure. The inner pipes are butted, connected and fixed by welding with high-strength bolts on the connecting ears.

To sum up, the present invention applies the FRP concrete structure in the field of offshore platforms. The FRP layer greatly improves the corrosion resistance of the platform structure, reduces the later maintenance cost of the components and prolongs the life of the structure; Constrain the deformation and give full play to the strength of concrete; the concrete layer in the component improves the overall rigidity of the structure and reduces the deformation of the lower truss structure under the action of underwater loads. By setting the annular damper, the deformation performance of the truss and the column under the load is improved, and at the same time, the durability of the use of the rod is improved, and the overall energy dissipation and shock absorption capacity of the structure is improved. In the present invention, the structural system connection method of the assembled FRP combined stay tower platform is connected by factory-prefabricated integral nodes to connect the column and the truss, and the stay cable tower platform is simplified through the nested connection of inner tubes and the connection and fixation of high-strength bolts. The construction technology of the structural system; the inner pipe resists shearing force at the joint, and the high-strength bolt resists the tensile force, which meets the strength and deformation requirements of the structure; during offshore construction, the single layered module can be hoisted simply and quickly for construction, and in sequence Assembling and docking, using the underwater robot to tighten the screws, the construction process of sequential docking is simple, time-consuming, and pollution-free; when the platform needs to be disassembled, it is only necessary to disassemble and transport the layered modules in sequence, and then transfer to other destinations. After the foundation is poured and formed, it can be installed directly, and the platform structure can be disassembled and assembled at any time, which has the effect of reuse and cost reduction.

Claims (10)

1. The utility model provides a tower platform system of assembled FRP concrete combination guy cable which characterized in that: the composite steel plate comprises an upper platform structure (1), a plurality of upper layer module single bodies (28), a layered connecting piece (6), a plurality of lower layer module single bodies (29) and an independent square foundation (11), wherein the plurality of upper layer module single bodies (28) and the plurality of lower layer module single bodies (29) are assembled through FRP integral type nodes (3), ring type dampers (8), FRP concrete combined columns (5), FRP concrete combined diagonal braces (7) and FRP concrete combined transverse braces (4) respectively to form an upper layer structure and a lower layer structure of a rigid connection system; the upper platform structure (1) is connected with an upper layer structure through an upper-lower structure connecting structure (2), the upper layer structure is connected with a lower layer structure through a layered connecting component (6), and the lower layer structure is connected with an independent square foundation (11) through a lower structure-foundation connecting component (9).

2. The fabricated FRP concrete composite guyed tower platform system of claim 1, wherein: the FRP integral type node (3) comprises a vertical half pipe (19), an oblique half pipe (20) and a transverse half pipe (21), the top and the bottom of the vertical half pipe (19) are respectively connected with an inner pipe (16) through an annular damper (8), the outer wall of the inner pipe (16) is provided with a backing plate (14), the outer wall of the backing plate (14) is provided with a high-strength bolt (15), the high-strength bolt (15) is connected with an FRP concrete combined column (5), the inner pipe (16) is inserted into the FRP concrete combined column (5), and the end part of the FRP concrete combined column (5) is provided with a connecting lug (17); the side wall of the vertical half pipe (19) is provided with an oblique half pipe (20) and a transverse half pipe (21), and the oblique half pipe (20) and the transverse half pipe (21) are respectively connected with the FRP concrete combined inclined strut (7) and the FRP concrete combined transverse strut (4).

3. The fabricated FRP concrete composite guyed tower platform system of claim 1, wherein: the layered connecting component (6) comprises a first C-shaped sleeve (23), a second C-shaped sleeve (26) and a hydraulic fixer (24), the first C-shaped sleeve (23) is connected with the second C-shaped sleeve (26) through the hydraulic fixer (24), the upper part of the first C-shaped sleeve (23) and the lower part of the second C-shaped sleeve (26) are respectively connected with the inner pipe (16) through a ring damper (8), the outer wall of the inner pipe (16) is provided with a backing plate (14), the outer wall of the backing plate (14) is provided with a high-strength bolt (15), the high-strength bolt (15) is connected with the FRP concrete combined column (5), the inner pipe (16) is inserted into the FRP concrete combined column (5), and the end part of the FRP concrete combined column (5) is provided with a connecting lug (17); an inclined half pipe (20) and a transverse half pipe (21) are arranged on the side wall of the C-shaped sleeve I (23), the inclined half pipe (20) and the transverse half pipe (21) are respectively connected with the FRP concrete combined inclined strut (7) and the FRP concrete combined transverse strut (4), and an FRP inner pipe (22) with a conical head is arranged at the bottom of the C-shaped sleeve I (23); and a rubber cushion layer (25) is arranged in the C-shaped sleeve II (26), an inclined half pipe (20) and a transverse half pipe (21) are arranged on the outer wall of the C-shaped sleeve II (26), and the inclined half pipe (20) and the transverse half pipe (21) are respectively connected with the FRP concrete combined inclined strut (7) and the FRP concrete combined transverse strut (4).

4. The fabricated FRP concrete composite guyed tower platform system of claim 3, wherein: the C-shaped sleeve I (23) and the C-shaped sleeve II (26) are assembled through a plurality of basic truss units (27), ring-type dampers (8) and FRP integral type nodes (3).

5. The fabricated FRP concrete composite guyed tower platform system of claim 1, wherein: the lower structure-foundation connecting member (9) comprises a connecting sleeve (10), an FRP (fiber reinforced plastic) belt conical head inner pipe (22) arranged at the bottom of the lower structure is inserted into the connecting sleeve (10), the connecting sleeve (10) is fixed on an independent square foundation (11), the independent square foundation (11) comprises a concrete base (31) and a steel plate foundation plate (30), and the outer walls of four circles of the concrete base (31) are provided with the steel plate foundation plate (30).

6. The fabricated FRP concrete composite guyed tower platform system of claim 1, wherein: upper portion platform structure (1) include a plurality of post leg connector (33), platform stand (34) and platform stull (35), platform stull (35) are crisscross each other and are located on platform stand (34), the post leg connector is equipped with platform stull (35) intersection, post leg connector (33) are connected with FRP concrete combination stand (5), post leg connector (33) department is equipped with stiffening rib (37).

7. The fabricated FRP concrete composite guyed tower platform system of claim 1, wherein: the FRP concrete combination upright post (5), the FRP concrete combination inclined strut (7) and the FRP concrete combination transverse strut (4) are respectively divided into three forms, wherein the forms comprise core concrete (40), a steel pipe (42) and an FRP pipe (41) from inside to outside in sequence, the forms comprise the core concrete (40), the steel pipe (42), sandwich concrete (38) and the FRP pipe (41) from inside to outside in sequence, and the forms comprise the steel pipe (42), the sandwich concrete (38) and the FRP pipe (41) from inside to outside in sequence.

8. The construction method of the fabricated FRP concrete combined guyed tower platform system according to claim 1, characterized by comprising the following steps: the construction method of the FRP concrete composite structure upright post (5) comprises the steps of wrapping a steel pipe (42) by using an outer-layer seamless winding type FRP pipe (41), fixing inner pipes with the radius being the radius of the inner wall of the steel pipe at the two ends of the steel pipe through transverse high-strength bolts, extending out to a designed length, sealing the end ports of the inner pipes at the lower part of the steel pipe, arranging a pouring opening at the top end of the inner pipe at the upper part, pouring self-compacting concrete into the FRP steel pipe, leveling the height of the concrete poured into the FRP steel pipe to the top of the inner pipe, and welding connecting lugs on the two end faces of the steel pipe after the concrete is formed; the FRP concrete combined waler (4) construction method comprises the steps of wrapping a steel pipe (42) by using an outer-layer seamless winding type FRP pipe (41), extending out a designed length from the two ends of the steel pipe through an inner pipe with the radius of a transverse high-strength bolt being the radius of the inner wall of the steel pipe, sealing the end port of the inner pipe at one end of the steel pipe, arranging a pouring opening at the top end of the inner pipe at the other end of the steel pipe, pouring self-compacting concrete into the FRP steel pipe, enabling the height of the concrete poured into the FRP steel pipe to be equal to the top of the inner pipe, and welding connecting lugs on the two end faces of the steel pipe after the concrete is formed; the construction method of the integral FRP node (3) comprises the steps of firstly designing a multi-plane node according to design requirements, wrapping the outer wall of the multi-plane node by using an outer seamless winding type FRP pipe, reserving embedding spaces at the ends of a vertical half pipe, a horizontal half pipe and an oblique half pipe of a single node, sealing, welding connecting lugs on the end faces of the half pipes, and finally pouring self-compacting concrete into a pouring hole to fill the inner space of the multi-plane node.

9. The construction method of the fabricated FRP concrete combined guyed tower platform system according to claim 1, characterized by comprising the following steps: firstly, sleeving an FRP concrete truss and an FRP concrete upright column prefabricated in a factory into an annular damper, butting an integral FRP multi-plane node, connecting and fixing the integral FRP multi-plane node through a high-strength bolt, forming a basic truss unit structure, and forming a layered module monomer of a truss by using 5-6 basic truss units; welding a C-shaped sleeve II at the upper end of each set single stand column of the layered module, and placing a rubber gasket into the C-shaped sleeve II; welding a first C-shaped sleeve at the lower end of each single upright post of the set hierarchical module, and installing and fixing a hydraulic fixer on the side wall of each upright post through a high-strength bolt; the upper end surface of the single column of the layering module at the top layer in the layering of the truss is provided with a bolt hole connecting lug and an inner tube with a designed length extending out, self-compacting concrete is poured into the inner tube, and the height of the concrete is equal to the top of the inner tube; forming a bolt hole connecting lug and welding a conical head inner pipe with a designed length on the lower end surface of a single column of a layering module at the bottom layer in the layering of the truss, and pouring self-compacting concrete into the inner pipe until the conical head inner pipe is filled; firstly, sleeving an FRP concrete truss and an FRP concrete upright column prefabricated in a factory into an annular damper, butting FRP integral multi-plane nodes, and connecting and fixing the FRP integral multi-plane nodes through high-strength bolts to form a truss platform structure; and welding the column leg connecting ports at the bottom of the truss platform according to design requirements.

10. The construction method of the fabricated FRP concrete combined guyed tower platform system according to claim 1, characterized by comprising the following steps: firstly, excavating an oil extraction site to a corresponding depth, leveling, placing a template and pouring a square independent foundation, wherein a steel foundation plate with a connecting sleeve is arranged at the upper part of the foundation; after the foundation is formed, arranging the truss layered module monomers prefabricated in a factory in sequence, and transporting the truss layered module monomers to corresponding places on the sea; secondly, sinking the bottom length layering module monomer in the truss layering to a specified position, butting an inner pipe with a conical head at the lower end of the bottom module with 4 connecting sleeves of a square independent foundation, and then screwing the high-strength bolts on the connecting lugs through an underwater robot; then sequentially immersing the layered module monomers into water, completely butting an inner pipe with a conical head at the lower end of the upper layer module monomer with a C-shaped sleeve of the lower layer module monomer, compacting an interface through a hydraulic fixer and screwing a high-strength bolt on a connecting lug by using an underwater robot; when the layered module monomer is assembled to the top layer module, a mooring cable (12) is tied at a mooring cable connecting part (32), and a mooring weight block (13) at the lower end of the mooring cable (12) is placed at a designed position to form a fixing effect on the tower structure; and finally, hoisting the upper structure, butting the lower column leg connecting port of the platform with the inner pipe of the top module of the lower structure, and connecting and welding and fixing the upper column leg connecting port and the inner pipe of the top module through high-strength bolts on the connecting lugs.

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