WO2018177306A1 - Fabricated underground wall and construction method thereof - Google Patents

Abstract

A fabricated underground wall, constituted by splicing multiple walls (1). The wall (1) is formed by assembling a bottom wall (1-1) and an upper wall (1-2); a concave-convex sub-port of a steel structure is provided at the slicing joint of adjacent two walls (1), that is, a protrusion on one of the walls is embedded into a recess on the other of the walls; the bottom and side surfaces of the walls (1) are provided with tracks (2); a chain cutter (3) is mounted on the track (2) during construction; the chain cutter (3) is composed of a chain (3-1) and a cutter (3-2) mounted on the chain (3-1); during construction, the chain cutter (3) merely excavates rock at the bottom of the wall (1); the wall (1) and the bottom chain cutter (3) move downwards simultaneously; after an upper plane of a lower wall (1) is lowered with the chain cutter to a set height with respect to the ground, the upper wall (1-2) is assembled and spliced; and welding is performed at the joint between the upper and lower walls before the walls are sent underground, thereby integrating the walls into a whole. Also disclosed is a construction method of the fabricated underground wall.

Description

Assembled underground wall and construction method thereof Technical field

The invention relates to a prefabricated underground wall and a construction method thereof, and belongs to the technical field of civil engineering foundation construction.

Background technique

The existing underground continuous wall technology uses a trenching machine on the ground to excavate a long and narrow deep trough under the condition of mud retaining wall, hoist the steel cage in the trough, and pour the underwater concrete into a unit trough section. This is done piece by piece. The main defects are as follows: 1) The underwater construction quality in the tank is difficult to control and detect, and the construction period is long; 2) The interface between the groove sections is difficult to construct and easy to seep; 3) The slotting machine is high and moves along the circumference. Applications are limited.

Summary of the invention

The invention provides a prefabricated underground wall and a construction method thereof, the purpose of which is to overcome the defects existing in the prior art, and the main advantage thereof is that the assembly of the adjacent two walls 1 is embedded and welded by the concave and convex, and the connection is safe and reliable. The sealing is good; the wall 1 itself has a chain knife for excavating the bottom of the rock, the factory prefabricated wall, the block is divided or the whole is lowered after the site is spliced, the construction is simple, the construction period is short, and the cost is low.

The technical solution of the invention is that the underground wall 1 is assembled by the bottom wall 1-1 and a plurality of walls 1-2; the assembling and splicing portions of the adjacent two walls 1 are respectively provided with concave and convex sub-ports of steel structure, that is, convexity of one wall The platform is embedded in the groove of another wall, and is divided into two structures: A and B: A. The interface of the same wall has both a groove and a boss, and the other wall is reversed; B, a wall is a groove, and the other wall It is a boss; the bottom and sides of the wall 1 are provided with a track 2, and the track 2 is provided with a chain knife 3, and the chain knife 3 is composed of a chain 3-1 and a cutter 3-2 mounted on the chain 3-1, the chain When the knife 3 is working, only the rock at the bottom of the wall 1 is excavated, and the wall 1 and the bottom chain cutter 3 are simultaneously operated downward. The upper plane of the lower wall 1 is lowered to the height set at the ground with the chain cutter, and then the upper part is assembled. Wall 1-2, the interface of the adjacent two walls is welded before entering the underground to make it integrated.

The invention has the advantages that the assembly of the adjacent two walls 1 adopts the concave-convex embedded welding and splicing, and the connection is safe and reliable, and the wall 1 itself has a chain cutter for excavating the bottom rock of the wall, and the factory prefabricated wall 1 is divided into blocks or the whole is dropped after the site is spliced. The construction is simple, the construction period is short, and the cost is low.

DRAWINGS

Figure 1 is a schematic view showing a structure in which the splicing joints of the adjacent two walls 1 are respectively provided with a concave and convex sub-port of a steel structure, that is, a boss of one wall is embedded in a groove of the other wall;

Figure 2 is a view of the A-A of Figure 1, and is also a structural schematic diagram of the welding of the bottom wall 1-1 and the upper wall 1-2 rows.

Figure 3 is a B-direction view of Figure 1, and is also a structural schematic diagram of the chain cutter driving device 5 composed of the driving power device 5-1, the spoil processing device 5-2 and the frame 5-3, and is also a chain knife 3 and a chain knife. A schematic structural view of the driving device 5 and the wall 1 in a construction state;

Figure 4 is a C-C view of Figure 3, also a cross-sectional view of the middle portion of the wall 1;

Figure 5 is an enlarged view of a portion I of Figure 2, which is also a schematic structural view of the rail 2 at the bottom of the bottom wall 1-1, and is also a mud nozzle 6-1 and a mud pipeline 6 of the mud pipeline device 6 on the bottom wall 1-1. Schematic diagram of -2;

Figure 6 is an enlarged view of a portion II of Figure 2, that is, one wall of the adjacent two walls 1 is a groove, and the other wall is a boss, and a plurality of holes are provided at the same position of the adjacent two walls, and the holes are formed at the time of splicing. A schematic structural view of the pin 7 is inserted therein, and is also a structural schematic view in which the connecting steel plate 8 is welded at the interface of the adjacent two walls 1 and the thickness after welding is not greater than the thickness of the underground wall 1;

7 is a schematic structural view of the chain cutter 3, and is also a schematic structural view of the chain 3-1 and the cutter 3-2;

FIG. 8 is a schematic structural view of another space-curable chain cutter 3, and is also a schematic structural view of the chain 3-1 and the cutter 3-2;

Figure 9 is a structural schematic view showing the assembly of the chain cutter 3 and the driving device 5 by assembling the bottom wall 1-1 and welding it into a whole;

Figure 10 is the bottom of the wall 1-1 chain knife 3 excavated rock, the side of the chain knife 3 running from the bottom up to bring the excavated rock to the top, the wall 1-1 and the bottom of the chain knife 3 together to drop to the set position Schematic diagram of the structure;

Figure 11 is a structural schematic view showing the removal of the driving device 5 after the upper chain cutter 3 is disconnected;

Figure 12 is a view of the A-A of Figure 11, which is also a schematic structural view of the bottom wall 1-1, and is a structural schematic view of the bottom wall 1-1 on which the plane is lowered to a height position set from the ground;

Figure 13 is a schematic view showing the structure after assembling the splicing upper wall 1-2, installing the chain cutter 3 and the driving device 5;

Figure 14 is a view of the A-A of Figure 13, and is also a structural schematic view in which the pin 7 is inserted into the hole during splicing, and the interface is welded by the steel plate 8 to be integrated;

Figure 15 is the bottom of the wall 1-1 chain knife 3 excavated rock, the side of the chain knife 3 running from the bottom up to bring the excavated geotechnical to the top, the welded wall 1 and the bottom of the chain knife 3 down to a schematic diagram of the structure of the set position;

Figure 16 is a schematic structural view of the assembly and splicing construction of all the walls 1;

Fig. 17 is a view taken along the line A in Fig. 16, and is a schematic view showing the structure in which the temporary tooling 4 is taken out after the wall 1 is constructed.

1 is the underground wall, which is assembled from the bottom wall 1-1 and several walls 1-2; 1-1 is the bottom wall of the underground wall 1; 1-2 is the wall above the bottom wall of the underground wall 1; It is a rail provided on the bottom and sides of the wall 1; 3 is a chain cutter for excavating rock and soil, consisting of a chain 3-1 and a cutter 3-2 mounted on the chain 3-1; 3-1 is a chain cutter 3 3-2 is a cutter constituting the chain cutter 3; 4 is a temporary tooling during construction; 5 is a chain cutter driving device, which is driven by the power unit 5-1, the spoil handling device 5-2, and the frame 5-3. Composition; 5-1 is the driving power device; 5-2 is the spoil handling device; 5-3 is the frame; 6 is the mud pipeline device; 6-1 is the mud nozzle on the bottom of the wall 1; 6-2 is the wall 1 internal mud pipeline; 7 is the pin inserted in the hole when the wall 1 is spliced; 8 is the steel plate welded when the wall 1 is spliced.

detailed description

The underground wall 1 is assembled from the bottom wall 1-1 and a plurality of walls 1-2; the assembly joints of the adjacent two walls 1 are respectively provided with concave and convex ports of steel structure, that is, the bosses of one wall are embedded in the concave of the other wall In the trough, there are two structures A and B: A. The interface of the same wall has both grooves and bosses, and the other wall is opposite; B, one wall is a groove, the other wall is a boss; wall 1 A rail 2 is arranged on the bottom and both sides, and a chain cutter 3 is arranged on the rail 2 during construction. The chain cutter 3 is composed of a chain 3-1 and a cutter 3-2 mounted on the chain 3-1. When the chain cutter 3 works, only the wall is excavated. 1 At the bottom of the rock, the wall 1 and the bottom chain knife 3 run downward at the same time. The upper plane of the lower wall 1 is lowered to the height set at the ground with the chain cutter, and then the upper wall 1-2 is assembled and adjacent. The joints of the two walls are welded before entering the ground to make them integrated.

One wall of the adjacent two wall interfaces is a groove, and the other wall is a boss. A plurality of holes are arranged at the same position of the adjacent two walls, and a pin is inserted into the hole during the splicing.

The interface between the adjacent two walls is welded with a connecting steel plate, and the thickness after welding is not greater than the thickness of the underground wall.

The specific construction method described is divided into the following steps:

1) Prefabricated wall 1-1 and wall 1-2 modules;

2) Clean up the site to meet the construction conditions;

3) transport the prefabricated walls 1-1 and 1-2 modules to the site;

4) Assembling the bottom wall 1-1, making it a whole by welding, installing the chain cutter 3 and the driving device;

5) Start the driving device, the bottom chain knife 3 of the wall 1-1 excavates the rock and soil, and the side of the chain knife 3 running from the bottom up to bring the excavated rock soil to the top;

6) Wall 1-1 and the chain cutter 3 at the bottom are lowered together;

7) The upper plane of the wall 1-1 is lowered to a height set from the ground, and the driving device is stopped;

8) Assembling and splicing the upper wall 1-2, the joint is welded to make it integrated;

9) Start the driving device, the bottom chain knife 3 of the wall 1-1 excavates the rock and soil, and the side of the chain knife 3 running from the bottom up to bring the excavated rock soil to the top;

10) the welded wall 1 and the bottom chain cutter 3 are lowered together;

11) The upper plane of the welded wall 1 is lowered to a height set from the ground, and the driving device is stopped;

12) Assembling and splicing the upper wall 1-2, welding at the interface to make it integrated;

Repeat the above construction of 9) to 12) until the assembly and splicing of all the walls 1 is completed.

The technical solution of the present invention is further described below with reference to the accompanying drawings:

As shown in FIG. 1 to FIG. 8 , the underground wall 1 is assembled from the bottom wall 1-1 and a plurality of walls 1-2; the assembling and splicing portions of the adjacent two walls 1 are respectively provided with concave and convex sub-ports of steel structure, that is, a wall The boss is embedded in the groove of the other wall, and is divided into two structures: A and B: A. The interface of the same wall has both a groove and a boss, and the other wall is reversed; B, a wall is a groove, and another One wall is a boss. The bottom of the wall 1 and the two sides are provided with a track 2, and the track 2 is provided with a chain cutter 3, the width of the chain cutter 3 is smaller than the width of the groove mouth at the interface, and the chain cutter 3 is connected by the chain 3-1 and the chain 3 The tool 3-2 is composed of -1, and the driving power device 5-1 drives the chain cutter 3. When the chain cutter 3 works, only the rock soil at the bottom of the wall 1 is excavated, and the bottom of the wall 1 is excavated by the chain cutter 3 running downward and upward. The rock belt is brought up to the upper side, and the device 5-2 separates the rock soil brought by the chain cutter 3 from the bottom of the wall 1 with the chain cutter 3, and the wall 1 and the bottom chain cutter 3 simultaneously run downward, and the upper plane of the lower wall 1-1 follows After the chain knife is lowered to the height set by the ground, the upper wall 1-2 is assembled and the interface of the adjacent two walls is welded before entering the ground to make it integrated; a wall at the interface between the adjacent two walls The groove is the groove, the other wall is a boss, and a plurality of holes are arranged at the same position of the adjacent two walls, and the pin 7 is inserted into the hole during the splicing; the connecting steel plate 8 is welded at the interface of the adjacent two walls, and the welding is performed. The thickness afterwards is not greater than the thickness of the underground wall.

As shown in Figure 9 to Figure 17, the specific construction method is divided into the following steps:

1) Prefabricated wall 1-1 and wall 1-2 modules;

2) Clean up the site to meet the construction conditions;

3) transport the prefabricated walls 1-1 and 1-2 modules to the site;

4) Assembling the bottom wall 1-1, making it a whole by welding, installing the chain cutter 3 and the driving device 5, etc.;

5) Start the driving device 5, the bottom chain knife 3 of the wall 1-1 excavates the rock and soil, and the side of the chain knife 3 running from the bottom up to bring the excavated rock soil to the top;

6) Wall 1-1 and the chain cutter 3 at the bottom are lowered together;

7) The upper plane of the wall 1-1 is lowered to a height set from the ground, and the driving device 5 is stopped;

8) Assembling and splicing the upper wall 1-2, the joint is welded to make it integrated;

9) Start the driving device 5, the bottom chain knife 3 of the wall 1-1 excavates the rock and soil, and the side of the chain knife 3 running from the bottom up to bring the excavated rock soil to the top;

10) the welded wall 1 and the bottom chain cutter 3 are lowered together;

11) The upper plane of the welded wall 1 is lowered to a height set from the ground, and the driving device 5 is stopped;

12) Assembling and splicing the upper wall 1-2, welding at the interface to make it integrated;

Repeat the above construction of 9) to 12) until the assembly and splicing of all the walls 1 is completed.

Claims (4)

A prefabricated underground wall, characterized in that the underground wall (1) is assembled from the bottom wall (1-1) and a plurality of walls (1-2); the assembly joints of the adjacent two walls (1) are respectively provided with steel The concave and convex mouth of the structure, that is, the boss of one wall is embedded in the groove of the other wall, and is divided into two structures A and B: A. The interface of the same wall has both a groove and a boss, and the other wall is opposite; B. One wall is a groove, the other wall is a boss; the bottom (2) of the wall (1) is provided with a track (2), and the track (2) is provided with a chain knife (3), a chain knife (3) It consists of a chain (3-1) and a cutter (3-2) mounted on the chain (3-1). The chain cutter (3) works only to dig the rock, wall (1) and bottom at the bottom of the wall (1). The chain cutter (3) runs downward at the same time, and the upper plane of the lower wall (1) is assembled with the upper wall (1-2) and the interface of the adjacent two walls after the chain cutter is lowered to the height set at the ground. Before welding into the ground, weld it and make it one. A fabricated underground wall according to claim 1, wherein one wall of the adjacent two wall interfaces is a groove, and the other wall is a boss, and a plurality of positions are provided at the same position of the adjacent two walls. Hole, when the splicing is inserted into the hole with a pin. A fabricated underground wall according to claim 1, wherein said adjacent two walls are welded with a connecting steel plate at an interface, and the thickness after welding is not greater than the thickness of the underground wall. A fabricated underground wall according to claim 1, wherein said specific construction method is divided into the following steps: 1) Prefabricated wall (1-1) and wall (1-2) modules; 2) Clean up the site to meet the construction conditions; 3) transport the prefabricated wall (1-1) and wall (1-2) modules to the site; 4) Assembling the bottom wall (1-1), making it a whole by welding, installing the chain cutter (3) and the driving device; 5) Start the driving device, the bottom chain knife (3) of the wall (1-1) excavates the rock and soil, and the side of the chain knife (3) running from the bottom up to bring the excavated rock soil to the top; 6) The wall (1-1) and the chain knife (3) at the bottom are lowered together; 7) The upper plane of the wall (1-1) is lowered to a height set from the ground to stop the driving device; 8) Assembling the upper wall (1-2) and welding the joint to make it integrated; 9) Start the drive device, the bottom chain knife (3) of the wall (1-1) excavates the rock and soil, and the side of the chain knife (3) running from the bottom up to bring the excavated rock and soil to the top; 10) The welded wall (1) and the bottom chain knife (3) are lowered together; 11) The upper plane of the welded wall (1) is lowered to a height set at the ground, and the driving device is stopped; 12) Assemble the upper wall (1-2) and weld the joint to make it integrated; Repeat the above construction of 9) to 12) until the assembly and splicing of the entire wall (1) is completed.

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