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Construction method of variable-section underground diaphragm wall

A technology of underground diaphragm wall and construction method, which is applied in the direction of sheet pile wall, foundation structure engineering, construction, etc. It can solve the problems of plastic pipe binding and positioning not firm, square caisson structure strength decrease, and welding bracket difficulty, etc. It is not easy to achieve Effects of displacement, shortened installation time, and convenient disassembly

Active Publication Date: 2020-04-03
通号建设集团第一工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a construction method for an underground diaphragm wall with variable cross-section, which solves the problems of weak binding and positioning of plastic pipes, decreased structural strength of square caissons and difficulty in welding brackets in existing construction methods for underground diaphragm walls with variable cross-section. big flaw

Method used

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  • Construction method of variable-section underground diaphragm wall
  • Construction method of variable-section underground diaphragm wall
  • Construction method of variable-section underground diaphragm wall

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Such as figure 1 Shown, the construction method of the underground continuous wall of a kind of variable cross-section provided by the invention comprises the following steps:

[0033] 1) Open the first lead holes at each corner position of the predetermined underground diaphragm wall; carry out concrete pouring to each first lead hole; open a plurality of second lead holes at intervals along the edge of the underground diaphragm wall; concrete pouring;

[0034] 2) Carry out the construction of the first lead hole at the four corners of the underground diaphragm wall at first, until the concrete pouring of the underground diaphragm wall at the corner is completed, and then carry out the second lead hole and underwater concrete pouring construction of the diaphragm wall in the middle section;

[0035] 3) Excavating soil to form a groove; 4) using a hole cleaning machine to clean up the groove until the sand content in the groove is less than 7%;

[0036] 5) Hoisting th...

Embodiment 2

[0040] Such as figure 2 , image 3 and Figure 4 As shown, the present invention also discloses a binding device, which includes an outer wire fixing sleeve 1 and an inner installation sleeve 2. The outer wire fixing sleeve includes a sleeve body 3, and an installation groove 4 penetrating both ends is opened in the sleeve body. The inner wall of the top of the installation groove is equipped with an upper conductive sheet 5, the inner wall of the bottom of the installation groove is equipped with a lower conductive sheet 6, the upper part of the sleeve is equipped with a positive terminal 7, and the lower part of the sleeve is equipped with a negative terminal 8 ; The upper conductive sheet is connected to the positive terminal through a wire, and the lower conductive sheet is connected to the negative terminal through a wire;

[0041] The inner mounting sleeve includes six equal-length ceramic support plates 9, the bottom ends of the six ceramic support plates are fixed t...

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Abstract

The invention discloses a construction method of a variable-section underground diaphragm wall. The construction method is characterized by comprising the following steps that 1) first guiding holes are formed in the corners of the a preset underground diaphragm wall, and multiple second guiding holes are formed along the edge of the underground diaphragm wall at intervals; 2) firstly, the first guiding holes in the four corners of the underground diaphragm wall are constructed, and then construction of the second guiding holes of the middle section of the diaphragm wall and underwater concrete pouring construction are carried out; 3) soil is cut to form a groove; 4) a hole cleaning machine is utilized for cleaning the formed groove; 5) a reinforcement cage is hoisted; 6) multiple plasticpipes sequentially penetrate through a bundling device, the plastic pipes are arranged in order after powering and fusing are carried out, multiple rebars penetrate into the plastic pipes, the two ends of each rebar are welded to brackets, and a square caisson is formed; and 7) the square caisson is hoisted to a preset variable-section cavity. According to the construction method of the variable-section underground diaphragm wall, the plastic pipes are bundled and positioned firmly, the square caisson is high in structural strength, and the bracket welding difficulty is low.

Description

technical field [0001] The invention relates to the field of building construction methods, in particular to a construction method for an underground diaphragm wall with variable cross-section. Background technique [0002] At present, compared with the ordinary underground diaphragm wall construction, the variable cross-section underground diaphragm wall requires a series of requirements such as the processing and manufacture of the reinforcement cage, the design of the lifting point of the reinforcement cage, and the selection of the concrete pouring method for the cavity, making the construction more difficult. Among them, in the processing and production of the reinforcement cage of the ground connection wall, the reinforcement cage of the underground diaphragm wall is composed of steel bars, steel columns, etc., and the volume of the steel columns is large, and the processing is difficult. Plastic pipes are used to fill the cavity formed by variable cross-section, which...

Claims

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Application Information

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IPC IPC(8): E02D5/20E02D15/04
CPCE02D5/20E02D15/04
Inventor 万明明
Owner 通号建设集团第一工程有限公司