Recyclable special-shaped diaphragm wall steel box joint lengthening tool and construction method

Abstract

The application discloses a recyclable special-shaped diaphragm wall steel box joint lengthening tool and a construction method, which comprises a lengthening tool main box body in a frame-shaped structure welded by steel plates, a resting bracket arranged on the side of the lengthening tool main box body, a lifting lug plate arranged at the top end of the lengthening tool main box body and welded and fixed with the lengthening tool main box body, a slurry outlet arranged on the side of the lengthening tool main box body, a hand hole and a hand hole cover arranged on the side of the lengthening tool main box body, and a connecting steel plate fixed to the lower part of the lengthening tool main box body through connecting bolts. The application is suitable for large cabin type anchor diaphragm wall foundation row insertion type mesh rigid joints, has a simple use method, solves the working condition of a large amount of steel waste of steel box lengthening, solves the problem of fixing of the top opening of the first-stage steel box of a high guide wall, and has strong applicability and economic value.

Description

Technical Field

[0001] The present invention relates to the field of bridge construction, and more particularly to a recyclable tool for extending a special-shaped ground-connected wall steel box joint and a construction method. Background Art

[0002] With the advancement of bridge construction, large-span bridges are increasingly being constructed. The compartment-type underground diaphragm wall anchor foundation combines the advantages of both caissons and ground-connected walls, avoiding the risk of sudden subsidence during excavation while also enabling unsupported excavation. However, during excavation, the ground-connected wall joints are subject to significant bending moments. Conventional ground-connected wall joints cannot meet these requirements, necessitating a new type of rigid mesh joint, which presents new challenges for underground diaphragm wall construction. Furthermore, the compartment-type ground-connected wall design features a high proportion of irregularly shaped ground-connected walls, and the design elevation of the ground-connected walls is generally lower than the guide wall elevation. This is particularly true in areas with high groundwater levels. To balance water pressure during trenching and prevent collapse, the trenching slurry level typically needs to be at least 1 meter above the groundwater level, necessitating the construction of a high guide wall. However, during construction, the steel box, as the first-phase trench section, is only concreted within the steel box, without direct contact with the soil. During the second-phase concrete pouring, significant lateral pressure is exerted on the steel box, necessitating the top of the steel box be secured to the guide wall. The general approach is to extend the steel box and anchor the top of the steel box to the guide wall by anchoring the steel plate. However, this approach will waste a lot of steel and will need to be chiseled out later, wasting a lot of manpower and material resources.

[0003] Therefore, there is an urgent need for a recyclable special-shaped ground-connected wall steel box joint extension tooling and construction method to solve the problem of fixing the top opening of the first-phase steel box of the high-conductivity wall, which has high practical and economic value. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to solve the problem of fixing the top opening of the first-phase steel box of the high-conductivity wall, and to provide a recyclable special-shaped ground-connected wall steel box joint extension tooling and construction method.

[0005] In order to achieve these purposes and other advantages according to the present invention, a recyclable special-shaped ground-connected wall steel box joint extension tool is provided, comprising:

[0006] The main box of the extended tooling is a frame structure welded from steel plates;

[0007] The bracket is placed on the side of the main box of the extension tooling;

[0008] The lifting lug is installed on the top of the main box of the extension tooling and is welded and fixed to the main box of the extension tooling;

[0009] The pulp outlet is set on the side of the main box of the extension tooling;

[0010] Hand holes and hand hole covers are provided on the side of the main box of the extended tooling;

[0011] The connecting steel plate is fixed to the lower part of the main box body of the extension tool by connecting bolts.

[0012] Preferably, the main box of the extension tool is assembled by welding a plurality of frame-shaped modules;

[0013] The said brackets are symmetrically arranged on both sides of the frame module located at the periphery of the main box of the extension tooling;

[0014] The slurry outlet is provided on the side of one of the frame-shaped modules located outside the periphery of the main box of the extension tooling;

[0015] The hand hole cover is provided on the side of each frame-shaped module provided with a connecting steel plate located on the outer periphery of the main box of the extension tooling;

[0016] The connecting steel plate is fixed to the lower end of the frame-shaped module on the periphery of the extension tool main box body by bolts.

[0017] Preferably, the main box of the extension tooling is composed of a central frame module and four groups of frame modules arranged around it to form a crisscross structure, wherein two opposite side surfaces of the frame modules located on the periphery extend a certain distance.

[0018] Preferably, the hand hole cover is arranged on the side of the extension tool main box body close to the connecting steel plate.

[0019] The present invention also provides a construction method using the recyclable special-shaped ground-connected wall steel box joint extension tooling, comprising the following steps:

[0020] After the S1 steel box and the extension tooling are processed, the steel box and the main box of the extension tooling are assembled together using bolts and connecting steel plates; the bolts are installed from the inside through the hand holes, and the outside of the steel box is tightened with nuts;

[0021] S2 uses a double-lift method to hoist the extension tooling and steel box into the slot as a whole;

[0022] After S3 is hoisted to the designed elevation, the extension tooling is placed on the guide wall or positioning frame using a shelving bracket. Steel plates or pads are placed under the shelving bracket to adjust the lowering elevation of the steel box.

[0023] S4 uses the conduit method to pour concrete in the steel box to a height of 0.5m above the design elevation, and after pouring the concrete, the elevation is 0.5m lower than the extension tooling. During the pouring process, a slurry discharge port is used to discharge the slurry that rises during the pouring process.

[0024] After S5 pouring is completed, the slurry layer in the steel box is extracted;

[0025] After the initial setting of the concrete in S6 and the pouring of the adjacent trough sections are completed, the connecting steel plate bolts are removed, the extension tooling is removed, and the trough section is moved to the next section for recycling.

[0026] Preferably, the steel box is a well-shaped special-shaped steel box.

[0027] The present invention includes at least the following beneficial effects: the present invention is suitable for large-scale compartment-type anchored ground-connected wall foundation row-type mesh rigid joints, the method of use is simple, and it solves the working condition of wasting a large amount of steel when extending the steel box, and solves the problem of fixing the top of the steel box of the first phase of the high-conducting wall, and has strong applicability and economic value.

[0028] Other advantages, objectives and features of the present invention will be reflected in part from the following description and will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the extension tooling of the present invention;

[0030] Figure 2 It is a schematic diagram of the connection between the steel box and the extension tooling of the present invention.

[0031] Explanation of the reference numerals: 1. Extending the main box body of the tooling, 2. Placing the corbel, 3. Lifting the ear plate, 4. Slurry outlet, 5. Hand hole cover, 6. Connecting steel plate, 7. Frame module, 8. Steel box, 9. Connecting bolts. DETAILED DESCRIPTION

[0032] The present invention is described in detail and completely below with reference to the accompanying drawings. Those skilled in the art will be able to implement the present invention based on this description. Before describing the present invention with reference to the accompanying drawings, it should be noted that the technical solutions and technical features provided in various parts of the present invention, including those described below, may be combined with each other unless they conflict.

[0033] In addition, the embodiments of the present invention described below are generally only part of the embodiments of the present invention, rather than all of the embodiments. Therefore, based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making any creative efforts should fall within the scope of protection of the present invention.

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The specific implementation process is as follows:

[0035] like Figure 1 As shown, a recyclable special-shaped ground-connected wall steel box 8 joint extension tooling includes:

[0036] The main box body 1 of the extension tooling is a frame structure formed by welding steel plates. The main box body 1 of the extension tooling is determined according to the shape and rigidity of the steel box 8 and the reinforcement form;

[0037] The shelving bracket 2 is set on the side of the main box body 1 of the extension tooling. The size and number of the shelving bracket 2 are determined according to the weight of the steel box 8;

[0038] The lifting lug plate 3 is arranged on the top of the extension tool main box 1, is welded and fixed to the extension tool main box 1, and is hoisted as a whole with the steel box 8 through the lifting lug plate 3;

[0039] The slurry outlet 4 is set on the side of the main box 1 of the extension tooling, and adopts a pump suction method to extract the upturned slurry during the underwater concrete pouring process;

[0040] The hand hole and the hand hole cover 5 are arranged on the side of the extended tool main box 1, and space is reserved for convenient bolt installation and removal;

[0041] The connecting steel plate 6 is fixed to the lower part of the extension tool main box 1 by the connecting bolts 9, and the steel box 8 is connected to the extension tool by bolts to facilitate installation and disassembly.

[0042] This technical solution may also include the following technical details to better achieve the technical effect: the main box body 1 of the extension tool is welded and assembled by a number of frame-shaped modules 7;

[0043] The brackets 2 are symmetrically arranged on both sides of the frame module 7 located on the outer periphery of the main box body 1 of the extension tool;

[0044] The slurry outlet is provided on the side of one of the frame-shaped modules 7 located on the outer periphery of the main box body 1 of the extension tool;

[0045] The hand hole cover 5 is provided on the side of each frame-shaped module 7 provided with a connecting steel plate 6 located on the outer periphery of the extension tool main box 1;

[0046] The connecting steel plate 6 is fixed to the lower end of the frame-shaped module 7 on the outer periphery of the extension tool main box 1 by bolts.

[0047] This technical solution can also include the following technical details to better achieve the technical effect: the main box body 1 of the extension tooling is composed of a central frame module and four groups of frame modules arranged around it to form a crisscross structure, wherein the two opposite sides of the frame module 7 located on the periphery extend a certain distance.

[0048] This technical solution may further include the following technical details to better achieve the technical effect: the hand hole cover 5 is arranged on the side of the extension tool main box 1 close to the connecting steel plate 6.

[0049] like Figure 2As shown, a construction method using recyclable special-shaped ground-connected wall steel box 8 joint extension tooling includes the following steps:

[0050] The steel box 8 described in S1 is a well-shaped special-shaped steel box 8. After the steel box 8 and the extension tooling are processed, the steel box 8 and the extension tooling main box body 1 are assembled into one by bolts and connecting steel plates 6; the bolts are installed from the inside through the hand holes, and the outside of the steel box 8 is tightened with nuts;

[0051] S2 uses a double-machine lifting method to hoist the extension tooling and steel box 8 into the slot as a whole;

[0052] After S3 is hoisted to the design elevation, the extension tooling is placed on the guide wall or positioning frame using the shelving bracket 2. A steel plate or pad is placed under the shelving bracket 2 to adjust the lowering elevation of the steel box 8.

[0053] S4 uses the conduit method to pour concrete in the steel box 8 to a height of 0.5m above the design elevation, and after pouring the concrete, the elevation is 0.5m lower than the extension tooling. During the pouring process, the slurry that rises during the pouring process is discharged through the slurry discharge port;

[0054] After S5 is poured, the slurry layer in the steel box 8 is extracted to prevent the slurry from wrapping around the connecting steel plate 6 after hardening, making it difficult to chisel it out later;

[0055] After the initial setting of S6 concrete and the pouring of adjacent trough sections are completed, remove the bolts connecting the steel plates 6, remove the extension tooling, and move to the next trough section for recycling.

[0056] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and embodiments shown and described herein.

Claims

1. A recyclable special-shaped ground-connected wall steel box joint extension tool, characterized in that: include: The main box of the extended tooling is a frame structure welded from steel plates; The bracket is placed on the side of the main box of the extension tooling; The lifting lug is installed on the top of the main box of the extension tooling and is welded and fixed to the main box of the extension tooling; The pulp outlet is set on the side of the main box of the extension tooling; Hand holes and hand hole covers are provided on the side of the main box of the extended tooling; The connecting steel plate is fixed to the lower part of the main box body of the extension tool by connecting bolts.

2. The recyclable special-shaped ground-connected wall steel box joint extension tool as claimed in claim 1 is characterized in that: The main box of the extension tooling is assembled by welding a number of frame-shaped modules; The said brackets are symmetrically arranged on both sides of the frame module located at the periphery of the main box of the extension tooling; The slurry outlet is provided on the side of one of the frame-shaped modules located outside the periphery of the main box of the extension tooling; The hand hole cover is provided on the side of each frame-shaped module provided with a connecting steel plate located on the outer periphery of the main box of the extension tooling; The connecting steel plate is fixed to the lower end of the frame-shaped module on the periphery of the extension tool main box body by bolts.

3. The recyclable special-shaped ground-connected wall steel box joint extension tool as claimed in claim 2 is characterized in that: The main box of the extension tooling is composed of a central frame module and four groups of frame modules arranged around it to form a well-shaped structure, wherein two opposite side surfaces of the frame modules located on the periphery extend a certain distance.

4. The recyclable special-shaped ground-connected wall steel box joint extension tool as claimed in claim 1 is characterized in that: The hand hole cover is arranged on the side of the extension tool main box body close to the connecting steel plate.

5. A construction method using the recyclable special-shaped ground-connected wall steel box joint extension tooling as described in any one of claims 1 to 4, characterized in that: The following steps are involved: After the S1 extension tooling is completed, the steel box and the main box of the extension tooling are assembled together using bolts and connecting steel plates; the bolts are installed from the inside through the hand holes, and the outside of the steel box is tightened with nuts; S2 uses a double-lift method to hoist the extension tooling and steel box into the slot as a whole; After S3 is hoisted to the designed elevation, the extension tooling is placed on the guide wall or positioning frame using a shelving bracket. Steel plates or pads are placed under the shelving bracket to adjust the lowering elevation of the steel box. S4 uses the conduit method to pour concrete in the steel box to a height of 0.5m above the design elevation, and after pouring the concrete, the elevation is 0.5m lower than the extension tooling. During the pouring process, a slurry discharge port is used to discharge the slurry that rises during the pouring process. After S5 pouring is completed, the slurry layer in the steel box is extracted; After the initial setting of the concrete in S6 and the pouring of the adjacent trough sections are completed, the connecting steel plate bolts are removed, the extension tooling is removed, and the trough section is moved to the next section for recycling.

6. The construction method according to claim 5, wherein: The steel box is a well-shaped special-shaped steel box.

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