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Repair structure and construction method of wall gap in underground diaphragm wall

A technology of underground diaphragm wall and construction method, which is applied in basic structure engineering, sheet pile wall, building and other directions, can solve the problems of high engineering cost, large amount of construction work, poor soil and water-stopping effect, etc., so as to ensure construction safety, The effect of enhancing structural strength

Active Publication Date: 2016-05-18
SHANGHAI NO 7 CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the wall gap of the existing underground diaphragm wall needs to rely on the supplementary underground diaphragm wall to close the joints between the walls, the construction quantity is large, the project cost is high, and the effect of retaining soil and water is poor. The purpose of the present invention is to provide a A repair structure and construction method for gaps in the width of an underground diaphragm wall. The sealing structure and the enclosure structure are used to form a water-stop curtain, which can effectively prevent the seepage water from the soil from infiltrating into the foundation pit, and ensure the construction safety of the foundation pit. And improve the construction efficiency, reduce the project cost

Method used

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  • Repair structure and construction method of wall gap in underground diaphragm wall
  • Repair structure and construction method of wall gap in underground diaphragm wall
  • Repair structure and construction method of wall gap in underground diaphragm wall

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Embodiment 1

[0035] Example 1: Combining figure 1 Illustrate the repairing structure of the gap of the underground diaphragm wall of the present embodiment, side A represents in the foundation pit in the accompanying drawing, side B represents outside the foundation pit, and the wall gap is positioned at the waterproof steel plate ( 12, 13), such as figure 1 As shown, the above-mentioned repair structure is composed of an enclosure structure 40 and a sealing structure 50; the side of the wall gap near the B side is covered with an enclosure structure 40 composed of piles, and two water-stop steel plates (12, 13 ) wing plates are connected by sealing steel plates, steel bars are bound in the gap of the wall and concrete is poured to make a sealing structure 50, and the sealing structure 50 can be connected with the adjacent underground continuous wall 10 as a whole. In this embodiment, the water-stop steel plates (12, 13) adopt H-shaped steel, and other forms of steel can also be used, whi...

Embodiment 2

[0040] Embodiment two: combine Figure 1 to Figure 6 Illustrate the construction method of the repairing structure of the underground diaphragm wall wall gap of the present embodiment, the A side represents the inside of the foundation pit, and the B side represents the outside of the foundation pit, and the specific steps are as follows:

[0041] S101, before excavating the earth in the foundation pit, if figure 2 As shown, an enclosure structure 40 composed of piles is constructed on the outside of the adjacent underground diaphragm wall 10 joint (that is, near the B side), so that the enclosure structure 40 is covered on the outside of the joint;

[0042] S102, such as image 3 and Figure 4 As shown, the earthwork in the foundation pit is excavated in layers, and there is a layer of earthwork between every two vertically adjacent concrete supports (60, 70). When the upper layer of earthwork is excavated to the bottom level of the concrete support 70 below Afterwards, s...

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Abstract

The invention provides a repair structure of an underground diaphragm wall panel notch and a construction method of the repair structure, and relates to the field of underground diaphragm walls. The problems that a joint of an existing wall panel notch needs to be closed by supplementing an underground diaphragm wall, the construction project amount is large, cost is high and the soil blocking and water stopping effect is poor are solved. The repair structure is composed of a retaining structure and a blocking structure. The outer side of the wall panel notch is wrapped by the retaining structure composed of piles. Wing plates of water stopping steel plates are connected through sealing steel plates. Concrete is poured into the wall panel notch to obtain the blocking structure. The blocking structure and the adjacent underground diaphragm wall can be connected into a whole. The construction method includes the steps of firstly, constructing the retaining structure at the joint; secondly, digging out soil of the positions where every two adjacent concrete supports are located, and picking out and conducting streaming on concrete to form the wall panel notch; thirdly, welding the water stopping steel plates to form a cavity, binding reinforcing steel bars and pouring concrete to form blocking units; fourthly, repeatedly executing the second step and the third step, conducting pouring on the blocking units from top to bottom step by step, wherein the blocking units are connected end to end to form the blocking structure, and the blocking structure is connected with the underground diaphragm walls on the two sides into a whole.

Description

technical field [0001] The invention relates to the technical field of construction of an underground diaphragm wall, in particular to a repair structure for gaps in the width of an underground diaphragm wall and a construction method thereof. Background technique [0002] With the continuous emergence of urban high-rise buildings, the diversification of building functions and the limitation of site space make more and more deep foundation pit projects. At present, in deep foundation pit engineering, the support form mainly adopts the form of underground diaphragm wall combined with reinforced concrete support. After the earthwork in the deep foundation pit is excavated and the reinforced concrete support construction is completed, the construction of the basement structure will be carried out. [0003] During the construction process of the underground diaphragm wall, the joints of two adjacent underground diaphragm walls, that is, the end-to-end connection of the undergro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/20
Inventor 郑杰杜星吴炜程唐海卿
Owner SHANGHAI NO 7 CONSTR