Construction method of underground diaphragm wall

Abstract

The invention aims at providing a construction method of an underground diaphragm wall. A separation wall composed of double rows of three-axis mixing piles is adopted, and double anti-seepage measures are adopted at a joint of the underground diaphragm wall, so that the technical problems that a groove is prone to collapsing in sludge geology, and leakage is prone to occurring at a waterproof weak position of the underground diaphragm wall are solved. The method comprises the following steps of building the separation wall composed of the three-axis mixing piles; reinforcing two sides of a construction position of the underground diaphragm wall by adopting the three-axis mixing piles; constructing the underground diaphragm wall by adopting a groove-jumping construction operation mode, a slurry retaining wall construction process and an underwater concrete pouring construction process, wherein a joint part of the underground diaphragm wall is the I-shaped steel joint; and treating a groove section joint by adopting a high-pressure jet grouting pile. Through the method disclosed by the invention, the construction problems of large disturbance deformation, easy groove collapse and the like of a sludge stratum can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of diaphragm wall construction, in particular to an underground diaphragm wall construction method. Background technique [0002] The underground diaphragm wall in the prior art is a construction method developed in the construction of deep foundations. It uses special trenching equipment to excavate trenches according to the designed width, length and depth along the deep foundation or the periphery of underground structures with thixotropic mud retaining wall. After the trench section is formed, a reinforcement cage is placed in the trench. Concrete is poured using the conduit method to form a unit trough section and concrete wall, so as to continue digging and pouring concrete construction, and connect the unit walls one by one by a certain joint method to form a continuous underground reinforced concrete wall or concrete wall. The curtain is used as an underground wall structure for anti-seepage, soil r...

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