Method for constructing underground diaphragm wall joint

Abstract

The invention discloses a method for constructing an underground diaphragm wall joint. The method refers to a slurry tank, a plurality of diaphragm wall channel sections are formed in the slurry tank, seams are formed between the adjacent diaphragm wall channel sections, a positioning piece is arranged at the top of each diaphragm wall channel section, the tops of the positioning pieces are connected with leakage detecting chambers, the bottoms of the leakage detecting chambers communicate with a plurality of ventilation pipes, the positions, corresponding to the ventilation pipes, of the tops of the leakage detecting chambers communicate with second leakage detecting channels, and the tops of the second leakage detecting channels communicate with mounting grooves. The positioning pieces are pre-buried in all the diaphragm wall channel sections correspondingly, the leakage detecting chambers are formed in the tops of the positioning pieces, permeability detection is conducted on the interiors of the leakage detecting chambers, after it is detected that no air leaks, leakage detection is conducted through the second leakage detecting channels, cavities and the ventilation pipes, if it is detected that leakage occurs, concrete is directly introduced for leaking stoppage, after leaking stoppage, construction can be completed only by pulling out the positioning pieces, simpleness and convenience are achieved, and leakage detecting of all the diaphragm wall channel sections in the slurry tank can be completed.

Description

technical field [0001] The invention relates to the related field of underground diaphragm walls, in particular to a construction method for underground diaphragm wall joints. Background technique [0002] Generally speaking, the underground diaphragm wall is a continuous reinforced concrete wall built underground as a water interception, anti-seepage, load-bearing, and water-retaining structure. The underground diaphragm wall is composed of many wall sections. In order to maintain the continuous construction between the wall sections, the joint adopts the lock pipe technology, that is, before pouring the concrete of the groove section, a diameter and groove is pre-inserted at the end of the groove section. Steel pipes with the same width, that is, locking pipes, after the initial setting of the concrete, the steel pipes are slowly pulled out, so that the ends form a semi-tenon-shaped joint. There are also rigid joints set up according to the force requirements of the wall ...

AI Technical Summary

Problems solved by technology

[0003] The shape and installation method of the joint play a decisive role in whether there will be leakage between the pouring groove sections of the underground connecting wall. Leakage occurs between the two unit groove sections, and the side seepage prevention and water retaining effects cannot be achieved. On this basis, a new construction method for the joint of the underground diaphragm wall is proposed. After the joint is constructed and installed , which greatly reduces the leakage between the unit tank sections, and brings convenience to the staff's follow-up operations

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