Large foundation pit assembling type structural steel supporting system

Abstract

The invention discloses a large foundation pit assembling type structural steel supporting system. The large foundation pit assembling type structural steel supporting system comprises first horizontal supporting pieces, second horizontal supporting pieces, joint connecting structures, vertical supporting structures and a hydraulic axial force compensation system. The first horizontal supporting pieces are located above the second horizontal supporting pieces. The first horizontal supporting pieces and the second horizontal supporting pieces are crossed to form crossed joints. The joint connecting structures comprise first vertical pivotal bases installed on the first horizontal supporting pieces at the crossed joints and second vertical pivotal bases installed on the second horizontal supporting pieces at the crossed joints, and vertical pivotal shafts are inserted. The vertical supporting structures are supported between the bottom of a foundation pit and the second horizontal supporting pieces. The first horizontal supporting pieces and the second horizontal supporting pieces which are arranged in a both-way manner are vertically arranged in a staggered manner, and a complex connecting structure at the crossed joints of the both-way horizontal supporting pieces on the same horizontal plane is effectively avoided. By means of the joint connecting structures which are arranged in a pivotal manner, linkage of the first horizontal supporting pieces and the second horizontal supporting pieces is improved, and the anti-buckling capability is improved.

Description

technical field [0001] The invention relates to the field of foundation pit support, in particular to a large-scale deep foundation pit assembly type steel support system. Background technique [0002] The internal support system of deep foundation pits generally adopts reinforced concrete structure. As we all know, the concrete support system needs to be dismantled after the completion of the underground space structure, which not only produces a large amount of solid waste, but also causes a serious waste of social resources. [0003] Some foundation pits are also supported by steel structures, such as two-way double steel pipe support structures, but the level of assembly construction is low, and material waste is serious. Moreover, this support system is mainly used for small foundation pit support and does not meet the needs of large foundation pit support. Require. The double steel pipe supports are arranged staggered along the horizontal and vertical directions on th...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a large-scale deep foundation pit assembly-type steel support system with high support rigidity, which is suitable for the support requirements of large-scale foundation pits, so as to solve the complex structure and buckling deformation at the intersection joints of the existing two-way double steel support structure The problem

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