Supporting structure for foundation pit excavation and using method

Abstract

The invention discloses a supporting structure for foundation pit excavation and a using method, and belongs to the technical field of building construction. The supporting structure comprises a stand column, a bottom plate and a waterproof assembly. The stand column is vertically inserted into the bottom plate, a gap space is formed between the stand column and the bottom plate, a first annular steel plate is inserted into the bottom plate, and the inner edge of the first annular steel plate is located in the gap space. The waterproof assembly comprises a steel pipe, a water stop plate and a second annular steel plate; the steel pipe is coaxially and fixedly arranged on the stand column in a sleeving mode; the water stop plate is located below the bottom plate; the water stop plate is perpendicular to the stand column; the outer edge of the water stop plate protrudes out of the gap space; the second annular steel plate is inserted into the water stop plate in parallel; and the inner edge of the second annular steel plate is perpendicularly welded to the outer circumferential wall of the steel pipe. According to the supporting structure for foundation pit excavation, the problem of water seepage of the bottom plate in the pouring process can be avoided, and the problem of water seepage at the joint of the bottom plate after construction can be solved.

Description

technical field [0001] The invention belongs to the technical field of building construction, and more specifically relates to a support structure for foundation pit excavation and a use method. Background technique [0002] The foundation pit is an earth pit excavated according to the size requirements at the foundation design position. During the excavation process of the foundation pit, it is necessary to arrange support structures in the foundation pit in advance to support the soil and ensure the normal progress of subsequent construction. Therefore, the supporting structure can only be dismantled after the main body (including the bottom plate) in the foundation pit is completed. [0003] In related technologies, in order to improve the bearing capacity of the supporting structure, the supporting structure is gradually replaced by a steel pipe column with a column, and the column is formed by pouring reinforced concrete, which can greatly improve its bearing capacity. ...

AI Technical Summary

Problems solved by technology

[0004] However, the connection point between the column and the foundation pit or the column and the bottom slab poured in the later foundation pit can be regarded as the contact between old and new concrete (there is a difference in construction time), so that the bottom slab is in the process of pouring (water seepage from the outer peripheral wall of the column) and after the pouring is completed. The joints of the bottom plate are prone to water seepage, which increases the risk of engineering accidents

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