Construction method of underground diaphragm wall

Abstract

The invention discloses a construction method of an underground diaphragm wall, belonging to the technical field of a support structure. The technical essentials comprise the following steps of: (1) digging a groove on a pre-set foundation and placing a steel reinforcement cage; and casting concrete to form an underground diaphragm wall section; (2) digging one groove at the adjacent position of the formed underground diaphragm wall section and placing one steel reinforcement cage; and casting the concrete to form one underground diaphragm wall section; reserving a suitable distance between the two adjacent underground diaphragm wall sections so as to ensure that connectors can be effectively overlapped; and (3) after casting the two underground diaphragm wall sections, forming holes on the connectors of the two wall sections when the concrete is not condensed; pouring the concrete into the holes to better connect the two underground diaphragm wall sections, so as to form a continuous whole body. The invention aims to provide the construction method of the underground diaphragm wall, which has the advantages of simplicity in construction and good water sealing effects; and the construction method is used for constructing the underground diaphragm wall.

Description

technical field [0001] The invention relates to a construction method of a supporting structure, more specifically, to a construction method of an underground connection wall. Background technique [0002] The underground continuous wall is to perform trough-forming operation in advance to form a trough section of a certain length, hang a reinforcement cage in the trough section, pour concrete to form a unit wall section, and then connect the unit wall sections to form a continuous underground reinforced concrete wall. The underground diaphragm wall can be constructed under complex conditions, has a large construction depth, a large bearing capacity of supporting components, and good anti-seepage performance. It is the most reliable support method in foundation pit support. Especially in the sand layer, in order to achieve the water-stop effect, it is necessary to use the underground diaphragm wall, which is the most reliable support method. At present, the underground diap...

AI Technical Summary

Problems solved by technology

[0005] However, the successive pouring of joint concrete will form a natural gap with mud skin at the joint of the wall, and there will be splits between the two walls due to the difference in verticality, and the differential deformation of the wall under the water and soil pressure will make the joint The joints will be further enlarged, and the current continuous wall joint measures have not effectively solved the above problems

After the underground diaphragm wall is greater than a certain depth, the huge water pressure will cause the water and sand on the outside to be brought into the foundation pit along the joints, which will bring a very large risk to the safety of the foundation pit

At the same time, as the main side wall of the permanent structure, joint leakage will bring a lot of inconvenience to the normal use of the building, and there are certain hidden dangers in the durability of the structure.