CN210031835U

CN210031835U - Underground continuous wall seam block structure

Info

Publication number: CN210031835U
Application number: CN201920257844.2U
Authority: CN
Inventors: 石重庆; 杨宏刚; 白小雪; 刘朋飞; 王树英
Original assignee: Central South University; Third Engineering Branch of China Railway First Engineering Group Co Ltd
Current assignee: Central South University; China Railway Group Ltd CREC; Third Engineering Branch of China Railway First Engineering Group Co Ltd
Priority date: 2019-02-28
Filing date: 2019-02-28
Publication date: 2020-02-07
Anticipated expiration: 2029-02-28

Abstract

The utility model discloses an underground continuous wall seam block structure, including the steel sheet that covers the seam with incite somebody to action the steel sheet is fixed at the fixed part on the continuous wall, the steel sheet with be equipped with the intermediate layer of hugging closely and covering the seam between the seam, the steel sheet with be located between the continuous wall grout is formed with sealing glue layer in the space outside the intermediate layer, the intermediate layer includes by interior kelp inflation belt layer that sets gradually outside to and the filter layer that is used for filtering earth. The interlayer of the utility model comprises the kelp expanding belt layer and the filter layer, on one hand, the filter layer can be used for filtering the soil, thereby reducing the adverse effect of the soil on the sealing glue layer and preventing the sealing glue layer from losing efficacy due to the influence of the soil; on the other hand, the kelp expanding tape layer can achieve the purpose of high-efficiency water plugging; in addition, the sealing glue layer is formed only by grouting in the gap between the steel plate and the continuous wall and positioned outside the interlayer, so that the glue consumption is also saved.

Description

Underground continuous wall seam block structure

Technical Field

The utility model belongs to the technical field of foundation ditch engineering, especially, relate to an underground continuous wall seam block structure.

Background

When a foundation of a high-rise building or a subway station is constructed, an open excavation method is generally adopted for construction, and a foundation pit needs to be excavated. In order to ensure the safety of the foundation pit in the excavation process, the stratum around the foundation pit needs to be reinforced in advance. As a safe and reliable reinforcing measure, underground continuous walls are often used for reinforcing the stratum around the foundation pit. The underground continuous walls have good waterproof performance, but at the joint positions of the two underground continuous walls, water leakage is often caused in the excavation process of the foundation pit due to unreliable sealing, and the safety of the foundation pit and surrounding structures is threatened.

Patent 2014203643728 discloses a sealing device for the seam leakage water of the underground diaphragm wall of the confined water foundation pit, which only needs to install the fixing part for the sealing part at the set position of the diaphragm wall during construction, and grouting is performed to realize the sealing of the seam. However, as the penetrating water generally contains soil, the soil directly acts on the glue solution, and the subsequent glue solution sealing is easy to lose efficacy. And a large amount of sealant is required to seal the joint.

SUMMERY OF THE UTILITY MODEL

The present application is directed to solving at least one of the problems in the prior art. Therefore, one of the objectives of the present invention is to provide a joint sealing structure for underground diaphragm wall, which is reliable in sealing and has less sealant consumption.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides an underground continuous wall seam block structure, including the steel sheet that covers the seam and inciting somebody to action the steel sheet is fixed at the fixed part on the continuous wall, the steel sheet with be equipped with between the seam and hug closely and cover the intermediate layer of seam, the steel sheet with be located between the continuous wall grout is formed with sealing glue layer in the space outside the intermediate layer, the intermediate layer includes the kelp inflation belt layer that sets gradually from inside to outside and is used for filtering the filter layer of earth.

Further, the fixed part includes pre-buried in the diaphragm wall be located a pair of magnet of seam both sides, magnet is extended to form outward the diaphragm wall with the absorption end that the steel sheet is connected.

Further, both ends of the adsorption end are flush with both ends of the seam.

Furthermore, the steel plate is composed of a plurality of steel plate units which are sequentially spliced along the extending direction of the joint, and a sealing element is arranged in the splicing joint between the adjacent steel plate units.

Furthermore, the sealing glue layer adopts a plugging layer of plugging king.

Furthermore, the filter layer comprises two metal meshes and filter cotton clamped and fixed between the two metal meshes.

Furthermore, the metal mesh is connected with the filter cotton through a stranded wire.

Compared with the prior art, the utility model has the advantages that the interlayer is arranged between the steel plate and the seam, and comprises the kelp expanding belt layer and the filter layer, so that on one hand, the filter layer can be used for filtering the soil, thereby reducing the adverse effect of the soil on the sealing glue layer and preventing the sealing glue layer from losing efficacy due to the influence of the soil; on the other hand, the kelp is soaked in water and expanded to increase the volume, and the peripheral gap is fully filled, compressed and compacted to form a kelp expansion belt layer, so that the aim of efficiently blocking water is fulfilled; in addition, the sealing glue layer is formed only by grouting in the gap between the steel plate and the continuous wall and positioned outside the interlayer, so that the glue consumption is also saved.

Drawings

FIG. 1 is a front view of embodiment 1;

FIG. 2 is a sectional view taken along line B-B of FIG. 1;

FIG. 3 is a sectional view taken along line A-A of FIG. 1;

FIG. 4 is a schematic cross-sectional view of the filter layer in example 1;

fig. 5 is a transverse sectional view of example 2.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example 1

Referring to fig. 1-3, the seam plugging structure for the underground diaphragm wall comprises a steel plate 2 covering a seam 1 and a fixing part 4 for fixing the steel plate 2 on the diaphragm wall 3, wherein an interlayer 5 clinging to and covering the seam 1 is arranged between the steel plate 2 and the seam 1, and a sealant layer 5 is formed in a gap between the steel plate 2 and the diaphragm wall 3 and positioned outside the interlayer by grouting. Wherein, the interlayer comprises a kelp expanding belt layer 6 and a filter layer 7 for filtering soil, which are arranged from inside to outside in sequence.

Referring to fig. 4, the filter layer 7 includes two metal mesh sheets 71 and filter cotton 72 clamped and fixed between the two metal mesh sheets 71, the metal mesh sheets 71 and the filter cotton 72 are connected by a twisted wire 73, and the filter cotton 72 is fixed by the metal mesh sheets 71. Of course, it is obvious to those skilled in the art that the filter layer 7 may be made of other filter materials with filtering soil in the prior art.

Referring to fig. 2 and 3, in this embodiment, the fixing portion 4 may be formed by using expansion bolts to fix the steel plates on the continuous wall, the interlayer is fixed to the joint 1 by pressing the steel plates 2, and the sealant layer 5 may be formed by pouring a leakage stoppage king anti-seepage liquid and solidifying, but the expansion bolts are used to fix and position the steel plates 2, which may damage the connecting wall 3. The steel plate 2 is composed of a plurality of steel plate units 21 which are sequentially spliced along the extending direction of the joint 1, and a sealing piece 8 is arranged in the joint between the adjacent steel plate units 21.

Referring to fig. 2 and 3, the construction process of the plugging structure of the embodiment is as follows: cover the intermediate layer on seam 1, splice in order through expansion bolts each steel sheet unit 21 and fix on connecting wall 3 along seam 1 extending direction, the intermediate layer compresses tightly through steel sheet 2 and covers on seam 1, seam concatenation seam between the adjacent steel sheet unit 21 realizes sealedly through sealing member 8, pour into sealed glue at the top of steel sheet 2 at last, glue solution downward flow fills and is located the space between the intermediate layer between steel sheet 2 and the diaphragm wall 3 and grout and be formed with sealing glue layer 5, accomplish the installation.

In the embodiment, the interlayer is arranged between the steel plate 2 and the seam 1 and comprises the kelp expansion belt layer 6 and the filter layer 7, so that on one hand, the filter layer 7 can be used for filtering mud, the adverse effect of the mud on the sealing glue layer 5 can be reduced, and the sealing glue layer 5 is prevented from losing efficacy due to the influence of the mud; on the other hand, the kelp is soaked in water and expanded to increase the volume, and the peripheral gap is fully filled, compressed and compacted to form a kelp expansion belt layer 6, so that the aim of efficiently blocking water is fulfilled; in addition, only the gap between the steel plate 2 and the continuous wall 3 outside the interlayer needs to be grouted and sealed, so that the glue consumption is saved.

Example 2

Referring to fig. 5, what is different from embodiment 1 is that the fixing portion 4 includes a pair of high-strength magnets embedded in the diaphragm wall and located at both sides of the joint, the high-strength magnets extend out of the diaphragm wall 3 to form an adsorption end connected with the steel plate 2, the steel plate 2 is fixed on the adsorption end by magnetic adsorption, and the length of the extension portion of the high-strength magnets is smaller than the thickness of the interlayer, so that the interlayer can be pressed on the joint. In order to ensure the connection strength, the adsorption surface of the adsorption end keeps close contact with the inner side surface of the steel plate 2, the magnetic adsorption force provided by the high-strength magnet must be greater than the acting force of the seepage water on the steel plate, and the two ends of the adsorption end are flush with the two ends of the seam 1. Compared with the embodiment 1 in which the steel plate 2 is fixed through the expansion bolts, the steel plate 2 is fixed through the high-strength magnets embedded in the wall, so that the structure of the wall cannot be damaged, and the installation is very convenient.

The above examples are merely illustrative of the present invention clearly and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Nor is it intended to be exhaustive of all embodiments. And obvious changes and modifications may be made without departing from the scope of the present invention.

Claims

1. The utility model provides an underground continuous wall seam block structure, includes the steel sheet that covers the seam and will the fixed part of steel sheet fixed on the continuous wall which characterized in that: the steel sheet with be equipped with the intermediate layer of hugging closely and covering the seam between the seam, the steel sheet with be located between the diaphragm wall grout is formed with sealing glue layer in the space outside the intermediate layer, the intermediate layer includes the kelp expanding strip layer that sets gradually from inside to outside and is used for filtering the filter layer of earth.

2. The underground diaphragm wall seam block structure of claim 1, wherein: the fixing part comprises a pair of magnets which are embedded in the continuous wall and located on two sides of the joint, and the magnets extend to the outer portion of the continuous wall to form an adsorption end connected with the steel plate.

3. The underground diaphragm wall seam block structure of claim 2, wherein: the two ends of the adsorption end are flush with the two ends of the seam.

4. The underground diaphragm wall seam block structure of claim 3, wherein: the steel plate is composed of a plurality of steel plate units which are sequentially spliced along the extending direction of the joint, and a sealing piece is arranged in the splicing joint between every two adjacent steel plate units.

5. The underground diaphragm wall seam block structure of claim 1, wherein: the sealing adhesive layer adopts a plugging layer of plugging king.

6. The underground diaphragm wall seam block structure of claim 1, wherein: the filter layer comprises two metal meshes and filter cotton clamped and fixed between the two metal meshes.

7. The underground diaphragm wall seam block structure of claim 6, wherein: the metal mesh is connected with the filter cotton through a stranded wire.