CN111236157A - Attached steel-concrete composite structure ship anti-collision structure - Google Patents

Abstract

The invention discloses an attached steel-concrete composite structure anti-ship collision structure, which is attached to the outer wall of a bridge pier or a bearing platform at the height of the water surface, and includes one or more units; The hollow inner cavity of the shell is provided with a skeleton, which is filled with foamed concrete; the skeleton includes a number of thin steel pipes and a number of steel lattices; a number of thin steel pipes are arranged parallel to each other, and the length direction of each thin steel pipe is parallel to the horizontal direction ; Every two adjacent thin steel pipes are connected by a steel lattice to form a network structure; several cavities enclosed by the steel lattice and the inner wall of the shell are filled with foamed concrete. The application of the invention makes the surface of the bridge pier anti-ship collision facility without exposed steel structure, and the foam concrete filled inside can better improve the energy dissipation after the ship collision, improve the anti-ship collision performance and durability of the bridge, and at the same time realize the anti-ship collision of the bridge pier. Self-floating of the facility.

Description

Attached steel-concrete composite structure ship anti-collision structure

technical field

The invention relates to the technical field of bridge pier protection, in particular to an attached steel-concrete composite structure anti-ship collision structure.

Background technique

The anti-ship collision facility for bridge piers is an existing technology that is widely used in the protection of various bridge piers. Among them, the attached bridge pier ship collision prevention facilities are mainly made of steel and FRP materials.

In practical application, the above two kinds of anti-ship collision facilities for bridge piers have certain defects.

In practical application, the steel attached bridge pier ship collision prevention facility is difficult to deal with the corrosion of metal materials, and the maintenance work after the anti-corrosion paint is scratched is also heavy, and the maintenance cost is high.

The attached pier anti-collision facility of FRP material solves the corrosion problem, but the structure is relatively thin, the anti-collision performance is limited, and the connection with the bearing platform under the action of wave dynamics is also very high. prone to problems.

Therefore, how to reduce the maintenance cost of the attached bridge pier anti-ship collision facility as much as possible on the premise of ensuring the use effect has become a technical problem that those skilled in the art need to solve urgently.

SUMMARY OF THE INVENTION

In view of the above-mentioned defects of the prior art, the present invention provides an attached steel-concrete composite structure anti-ship collision structure. There is no exposed steel structure on the outside, which improves durability. The foamed concrete inside can better improve the energy dissipation after ship collision, simplify daily maintenance work, reduce maintenance costs, improve the anti-ship collision performance and durability of bridges, and realize bridge piers at the same time. The self-floating anti-ship collision facility makes installation and connection more convenient.

In order to achieve the above object, the present invention discloses an attached steel-concrete composite structure anti-ship collision structure, which is attached to the outer wall of the bridge pier or the platform at the water surface height, and includes one or more units.

The unit includes an outer shell, the outer shell is a box-shaped structure, and is made of strain-strengthened UHPC concrete material;

The hollow inner cavity of the shell is provided with a skeleton and filled with foamed concrete;

The skeleton includes several thin steel tubes and several steel lattice structures;

A plurality of the thin steel pipes are arranged parallel to each other, and the length direction of each thin steel pipe is parallel to the horizontal direction;

Every two adjacent thin steel pipes are connected by the steel lattice to form a mesh structure;

The several cavities enclosed by the plurality of shaped steel lattice structures and the inner wall of the casing are filled with foamed concrete.

Preferably, the outer shell is prefabricated by casting strain-strengthened UHPC concrete with fine steel mesh sheets.

More preferably, each of the thin steel pipes and/or each of the shaped steel lattices in contact with the fine steel mesh sheets is connected with the corresponding fine steel mesh sheets by welding or bolting.

More preferably, the casing includes side plates on both sides, end plates at both ends, a top plate and a bottom plate, which are connected by cast-in-place wet-joint sections.

More preferably, rubber chord guards are provided on the side plates on both sides; among the side plates on both sides, the side plate facing the platform is the inner plate, and the side plate facing away from the platform is the outer plate. plate.

Preferably, the length of the casing is 6 meters to 10 meters.

Beneficial effects of the present invention:

The present invention combines the characteristics of the existing steel and FRP material attached bridge pier anti-ship collision facilities, so that there is no exposed steel structure on the outside, and the durability is improved. Energy dissipation, simplifies daily maintenance work, reduces maintenance costs, improves bridge anti-ship collision performance and durability, and at the same time realizes self-floating of bridge pier anti-ship collision facilities, making installation and connection more convenient.

The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings, so as to fully understand the purpose, characteristics and effects of the present invention.

Description of drawings

FIG. 1 shows a schematic structural diagram of an embodiment of the present invention attached to a bridge pier or a platform.

FIG. 2 shows a schematic structural diagram of an embodiment of the present invention in which a plurality of units are interconnected and integrated.

FIG. 3 shows a partially enlarged structural schematic diagram of the connection structure of the fine steel mesh and the profiled steel lattice in an embodiment of the present invention.

Detailed ways

Example

As shown in Figures 1 and 2, the attached steel-concrete composite structure anti-ship collision structure is attached to the outer wall of the bridge pier or the cap 1 at the water surface level, and includes one or more units.

The unit includes an outer shell, which is a box-shaped structure made of strain-strengthened UHPC concrete material;

The hollow inner cavity of the shell is provided with a skeleton, which is filled with foam concrete 7;

The skeleton includes several thin steel tubes 8 and several steel lattice structures 9;

Several thin steel pipes 8 are arranged parallel to each other, and the length direction of each thin steel pipe 8 is parallel to the horizontal direction;

Every two adjacent thin steel pipes 8 are connected by a steel lattice 9 to form a mesh structure;

Several cavities surrounded by several steel lattices 9 and the inner wall of the shell are filled with foamed concrete 7 .

The principle of the present invention is as follows:

The UHPC concrete material has the characteristics of high strength and high toughness. Under a small impact force, the anti-ship collision structure is elastic and intact, and the conventional scraping of the ship will not cause great damage to the anti-ship collision structure.

Under the action of a large impact force, the shell made of UHPC concrete material can disperse the point action to a large deformation range. or impact load on deck 1.

The cavity in each thin steel pipe 8 can achieve the purpose of weight reduction, and each thin steel pipe 8 can consume energy through deformation under a large impact force.

The outer shell made of UHPC concrete material is convex polyline or convex curved surface, which has small horizontal stiffness, and can generate large deformation to dissipate the impact energy under the action of the ship's impact force.

The skeleton of the network structure formed by several thin steel pipes 8 and several steel lattice structures 9 is filled with foamed concrete 7 in several cavities enclosed by the several steel lattice structures 9 and the inner wall of the shell.

The system realizes the dissipation of impact energy through several thin steel pipes 8 , several shaped steel lattices 9 , deformation of the shell made of UHPC concrete material, and fragmentation of the foamed concrete 7 under the impact force of the ship.

As shown in FIG. 3 , in some embodiments, the outer shell is prefabricated by pouring the strain-strengthened UHPC concrete material using fine steel mesh sheets 10 .

In some embodiments, each thin steel tube 8 and/or each steel lattice 9 in contact with the fine steel mesh sheet 10 is connected to the corresponding fine steel mesh sheet 10 by welding or bolting.

In some embodiments, the housing includes side plates on both sides, end plates at both ends, a top plate 5 and a bottom plate 6, which are connected by cast-in-place wet joints.

In some embodiments, rubber chord guards 2 are provided on both side plates; among the side plates on both sides, the side plate facing the platform 1 is the inner plate 4, and the side plate facing away from the platform 1 is the outer plate 3.

In certain embodiments, the housing is 6 meters to 10 meters in length.

The preferred embodiments of the present invention have been described above in detail. It should be understood that those skilled in the art can make numerous modifications and changes according to the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art through logical analysis, reasoning or limited experiments on the basis of the prior art according to the concept of the present invention shall fall within the protection scope determined by the claims.

Claims (6)

1. The ship collision prevention structure of the attached steel concrete composite structure is attached to the outer wall of a pier or a bearing platform (1) at the height of a water surface and comprises one or more units; the method is characterized in that:

the unit comprises a shell which is of a box-shaped structure and is made of a strain-reinforced UHPC concrete material;

a framework is arranged in a hollow inner cavity of the shell and is filled with foam concrete (7);

the framework comprises a plurality of thin steel pipes (8) and a plurality of steel lattices (9);

the thin steel pipes (8) are arranged in parallel, and the length direction of each thin steel pipe (8) is parallel to the horizontal direction;

every two adjacent thin steel pipes (8) are connected through the section steel lattice (9) to form a net structure;

and a plurality of cavities formed by the steel section lattices (9) and the inner wall of the shell are filled with foam concrete (7).

2. The attachment type steel reinforced concrete composite structure ship collision prevention structure as claimed in claim 1, wherein the outer shell is prefabricated by pouring strain-reinforced UHPC concrete material through a thin steel mesh (10).

3. The attachment type steel reinforced concrete composite structure ship collision prevention structure according to claim 2, wherein each of the thin steel pipes (8) and/or each of the steel section lattices (9) in contact with the fine steel mesh sheets (10) is connected with the respective fine steel mesh sheets (10) by welding or bolting.

4. The structure of claim 2, wherein the outer hull comprises two side panels, two end panels, a top panel (5) and a bottom panel (6), which are connected by a cast-in-place wet joint.

5. The attached steel reinforced concrete composite structure ship collision prevention structure as claimed in claim 4, wherein rubber protective strings (2) are arranged on the side plates on both sides; the side plates on the two sides facing the bearing platform (1) are inner side plates (4), and the side plates back to the bearing platform (1) are outer side plates (3).

6. The attachment type steel reinforced concrete composite structure ship collision prevention structure according to claim 1, wherein the length of the outer shell is 6 to 10 meters.

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