CN219045162U

CN219045162U - Underground diaphragm wall foundation pit support

Info

Publication number: CN219045162U
Application number: CN202320057860.3U
Authority: CN
Inventors: 郝晓光; 陈辉强; 赖鸿荣; 白军旺
Original assignee: State Construction Huazhong Construction Co ltd
Current assignee: State Construction Huazhong Construction Co ltd
Priority date: 2023-01-09
Filing date: 2023-01-09
Publication date: 2023-05-19
Anticipated expiration: 2033-01-09

Abstract

The utility model relates to the field of building equipment, in particular to an underground continuous wall foundation pit support, which comprises walls and flexible joints, wherein the flexible joints are columnar bodies for pouring concrete in flexible hollow pipes, a plurality of flexible joints are embedded in joints of two adjacent walls, and the flexible joints are mutually attached and sealed and staggered to form a meshed structure. According to the utility model, through improving the underground diaphragm wall foundation pit supporting structure, the thick-wall flexible pipe sleeve with good sealing and buffering performances is arranged outside the flexible joint, and the concrete core column with strong bearing capacity is poured inside the thick-wall flexible pipe sleeve, and the flexible joints are mutually attached, sealed and alternately arranged in a penetrating way to form a meshed structure, so that the sealing performance of the joint and the buffering performance of the diaphragm wall in response to the expansion and contraction change can be improved, and the anti-seepage effect and the service life of the whole diaphragm wall supporting structure can be improved.

Description

Underground diaphragm wall foundation pit support

Technical Field

The utility model relates to the field of building equipment, in particular to an underground continuous wall foundation pit support.

Background

The underground diaphragm wall has good seepage-proofing performance and strong soil retaining and bearing capacity, and is often used for supporting a foundation pit of a deep foundation pit with higher underground water level and higher water pressure. However, the underground diaphragm wall needs to be constructed in sections, the length of each unit wall section is generally controlled to be about 4-6 m, and if the surrounding environment is unfavorable or the stability of a matrix is poor, the length of the wall section is shorter, so that joints are required to be arranged at joints of adjacent underground diaphragm walls for connection and water shutoff. If the joint is sealed and carried poorly, problems such as water seepage, sand flow and piping can appear from the joint during support, and even the risk of foundation pit groundwater flood irrigation appears. Considering the settlement and expansion effects of underground continuous walls of each section, most of the existing joints adopt flexible connection joint forms, such as corrugated pipe joints, locking pipe joints and the like, but the flexible joints often adopt single or multiple single rows, the tightness and the expansion and contraction change buffering performance of the continuous walls are insufficient, so that the seepage prevention performance of the whole continuous wall support is reduced, and the use effect and the service life are influenced. In view of this, there is a need for improvements in underground diaphragm wall foundation pit supporting structures.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model discloses an underground continuous wall foundation pit support which comprises walls and flexible joints, wherein the flexible joints are columnar bodies for pouring concrete in flexible hollow pipes, a plurality of flexible joints are embedded in joints of two adjacent walls, and the flexible joints are mutually attached and sealed and staggered to form a meshed structure. According to the utility model, through improving the underground diaphragm wall foundation pit supporting structure, the thick-wall flexible pipe sleeve with good sealing and buffering performances is arranged outside the flexible joint, and the concrete core column with strong bearing capacity is poured inside the thick-wall flexible pipe sleeve, and the flexible joints are mutually attached, sealed and alternately arranged in a penetrating way to form a meshed structure, so that the sealing performance of the joint and the buffering performance of the diaphragm wall in response to the expansion and contraction change can be improved, and the anti-seepage effect and the service life of the whole diaphragm wall supporting structure can be improved.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides an underground continuous wall foundation ditch support, includes the wall body, the wall body for building underground and be used for the continuous wall component of support foundation ditch, the wall body is equipped with a plurality of sections of a word range, its characterized in that: the flexible joint is a columnar body for pouring concrete in a flexible hollow pipe, the flexible joint is provided with a plurality of flexible joints, the flexible joints are embedded at the joint of two adjacent walls and are mutually attached and sealed and staggered to form a meshed structure.

The flexible joint comprises a flexible pipe sleeve and a core column, and the core column is poured in the flexible pipe sleeve.

Further, the flexible pipe sleeve is a thick-wall rubber hollow round pipe, and the wall thickness of the flexible pipe sleeve is not less than 50mm.

Further, the core column is a concrete casting body.

The two adjacent wall bodies are provided with a plurality of semi-arc grooves on the respective end faces of the wall joints, the center distances of the two adjacent grooves on each end face are equal, the center distances are smaller than the sum of the diameters of the two flexible joints, the diameters of the flexible joints are matched with the diameters of the grooves on the wall joints, the flexible joints can be embedded in the semi-arc grooves, and the adjacent flexible joints are arranged in a staggered mode and are tightly attached to each other.

From the above description, the underground diaphragm wall foundation pit support provided by the utility model has the advantages that: the outside at flexible joint is equipped with the thick wall flexible pipe box that has good sealing and cushioning properties to pour the strong concrete stem of bearing capacity in its inside, a plurality of flexible joints laminating each other are sealed and crisscross interlude are arranged and are formed the meshing form structure, even each section underground diaphragm wall is receiving different ambient temperature and geological structure's influence and producing necessary subsidence and flexible, cushion and absorb the leakproofness that can improve the seam crossing and should the flexible buffer nature that changes of diaphragm wall through a plurality of flexible joints of crisscross meshing and sealing, thereby can improve the prevention of seepage effect and the life of whole diaphragm wall support. The utility model has reasonable design, simple structure, low cost and convenient popularization.

Drawings

FIG. 1 is a schematic view of a foundation pit support for an underground diaphragm wall according to the present utility model;

FIG. 2 is an enlarged schematic view of A-A in FIG. 1;

fig. 3 is an enlarged view of fig. 2 in the direction B.

Reference numerals:

1, a wall body; 11 wall joints; 2 a flexible joint; a flexible tube sleeve 21; 22 stem.

Detailed Description

The utility model is further described below by means of specific embodiments.

As shown in fig. 1 to 3, the underground diaphragm wall foundation pit support according to the present utility model includes a wall 1 and a flexible joint 2. The wall body 1 be built underground and be used for supporting the continuous wall component of foundation ditch, wall body 1 is equipped with a plurality of sections of straight line range, flexible joint 2 be the column body of pouring concrete in flexible hollow tube, flexible joint 2 is equipped with a plurality of, a plurality of flexible joints 2 imbeds in the seam crossing of two adjacent wall bodies 1 and flexible joint 2 laminating each other is sealed and staggered arrangement forms the meshing form structure.

As shown in fig. 1 to 3, the flexible joint 2 according to the present utility model includes a flexible pipe sleeve 21 and a stem 22, and the stem 22 is cast in the flexible pipe sleeve 21. The flexible pipe sleeve 21 is a thick-wall rubber hollow round pipe, the wall thickness of the thick-wall rubber hollow round pipe is not less than 50mm, and the wall thickness of the flexible pipe sleeve 21 in the embodiment is 70mm. The core column 22 is a concrete casting body. The adjacent two walls 1 are provided with a plurality of semi-arc grooves on the respective end surfaces of the wall joints 11, the center distances of the adjacent two grooves on each end surface are equal, the center distances are smaller than the sum of the diameters of the two flexible joints 2, the diameters of the flexible joints 2 are matched with the diameters of the grooves on the wall joints 11, the flexible joints 2 can be embedded in the semi-arc grooves, and the adjacent flexible joints 2 are arranged in a staggered mode and are tightly attached.

The stem 22 of the flexible joint 2 can be poured into the flexible pipe sleeve 21 in advance to form the stem 22 and the flexible pipe sleeve 21 into a whole; the in-situ casting stem 22 may also be reproduced by pressing the flexible sleeve 21 into a half-arc shaped recess hole drilled at the wall joint 11 of an adjacent wall 1 while the wall 1 is being constructed.

When the underground diaphragm wall is constructed, the wall joints 11 can be reserved after the adjacent wall bodies 1 are respectively poured, a plurality of semi-arc-shaped groove holes are drilled on the respective end faces of the wall joints 11, and then a plurality of flexible connectors 2 which are poured or flexible sleeves 21 without core columns 22 which are not poured are pressed into the wall joints. If an empty flexible sleeve 21 is pressed in, the stem 22 is poured after the pressing in.

When the underground diaphragm wall is constructed, a plurality of flexible joints 2 with core columns 22 poured in advance can be staggered, mutually attached and sealed to form a meshed shape, and the flexible joints are fixed at the wall joints 11 of the wall body 1 to be poured in advance; and pouring the wall body 1, and embedding a plurality of flexible joints 2 at wall joints 11 of the adjacent wall bodies 1.

According to the utility model, through improving the underground diaphragm wall foundation pit supporting structure, the thick-wall flexible pipe sleeve with good sealing and buffering performances is arranged outside the flexible joint, and the concrete core column with strong bearing capacity is poured inside the thick-wall flexible pipe sleeve, and the flexible joints are mutually attached, sealed and alternately arranged in a penetrating way to form a meshed structure, so that the sealing performance of the joint and the buffering performance of the diaphragm wall in response to the expansion and contraction change can be improved, and the anti-seepage effect and the service life of the whole diaphragm wall supporting structure can be improved.

The foregoing is merely an embodiment of the present utility model, but the design concept of the present utility model is not limited thereto, and any insubstantial modification of the present utility model by using the concept shall belong to the behavior of infringement of the protection scope of the present utility model.

Claims

1. The utility model provides an underground continuous wall foundation ditch support, includes wall body (1), wall body (1) be built by laying bricks or stones and be used for supporting the continuous wall component of foundation ditch underground, wall body (1) are equipped with a plurality of sections of a word range, its characterized in that: still include flexible joint (2), flexible joint (2) be the column body of pouring concrete in flexible hollow tube, flexible joint (2) are equipped with a plurality of, a plurality of flexible joint (2) imbeds in the seam crossing of two adjacent wall bodies (1) and flexible joint (2) laminating each other is sealed and staggered arrangement forms meshing form the structure.

2. The underground diaphragm wall foundation pit support of claim 1, wherein: the flexible joint (2) comprises a flexible pipe sleeve (21) and a core column (22), wherein the core column (22) is poured in the flexible pipe sleeve (21).

3. The underground diaphragm wall foundation pit support of claim 2, wherein: the flexible pipe sleeve (21) is a thick-wall rubber hollow round pipe, and the wall thickness of the thick-wall rubber hollow round pipe is not less than 50mm.

4. A diaphragm wall pit support according to claim 3, wherein: the core column (22) is a concrete casting body.

5. The underground diaphragm wall foundation pit support of claim 4, wherein: the two adjacent wall bodies (1) are provided with a plurality of semi-arc grooves on the end faces of the wall joints (11), the center distances of the two adjacent grooves on each end face are equal, the center distances are smaller than the sum of the diameters of the two flexible joints (2), the diameters of the flexible joints (2) are matched with the diameters of the grooves on the wall joints (11), the flexible joints (2) can be embedded in the semi-arc grooves, and the adjacent flexible joints (2) are arranged in a staggered mode and are tightly attached to each other.