Joint pipe used for buried type waterproof steel plate in underground diaphragm wall and construction method of joint pipe

Abstract

The invention relates to the field of constructional engineering, in particular to a joint pipe used for a buried type waterproof steel plate in an underground diaphragm wall and a construction method of the joint pipe. The joint pipe comprises a joint pipe body, the side wall of the joint pipe body is provided with an opening for fixing the waterproof steel plate, and a telescopic tongue is arranged at the opening and fixed to the joint pipe body through a bolt. With the assistance of the joint pipe, the waterproof steel plate is placed at a joint of the underground diaphragm wall, and the water seepage phenomenon is effectively avoided. The joint pipe and the construction method have the advantages that the structure is simple, the cost is low and the operation is easy, and are convenient to use and popularize.

Description

technical field [0001] The invention relates to the field of construction engineering, in particular to a joint pipe used for a buried waterproof steel plate in an underground continuous wall and a construction method thereof. Background technique [0002] With the rapid development of my country's infrastructure construction, there are more and more deep foundation pit projects such as subway stations. Among various foundation pit maintenance methods, the underground diaphragm wall has been used more and more because of its outstanding advantages such as good integrity, high rigidity, and good displacement control effect. [0003] The underground diaphragm wall is to be grooved in advance to form a groove section with a certain length and shape. The prefabricated steel cage is placed in the groove section, and concrete is poured to form the wall section. In this continuous construction, the wall sections are connected to each other to form a wall. Complete underground wall...

AI Technical Summary

Problems solved by technology

[0004] Due to the limitation of construction technology and construction process, when the underground diaphragm wall is grooved, there is a deviation in the verticality control of two adjacent walls, which reduces the anti-seepage ability of the joint position; Part of the mud skin and mud residue will remain in the position, so that under the action of water pressure, a leakage channel will be formed; due to insufficient cleaning of the tank, the thickness of the sediment does not meet the requirements, and part of the sediment will also be pushed to the groove section during concrete pouring Seam position, which also leads to mud seepage

Therefore, water seepage at the joint position of the underground diaphragm wall groove section is a common problem, and it also brings great hidden dangers to the safety of the project

[0005] At present, the anti-seepage and plugging method commonly used in engineering is mainly to build high-pressure rotary grouting piles outside the joints of the groove sections. This method occupies the construction site, affects the construction period, and has high project cost; for local spot leakage, clean the surface and chisel. Use polyurethane and other materials to plug leaks; for large-area line leaks, cut and pick grooves at the leaks, place plastic pipes in the grooves for drainage after chiseling, and seal them with seam sealing materials

These two methods cannot repair the internal defects of the underground diaphragm wall, and the sealing effect is difficult to meet the requirements

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