Construction method for dynamic steel supporting system of deep foundation pit

Abstract

The invention discloses a construction method for a dynamic steel supporting system of a deep foundation pit. The construction method comprises the following steps: constructing a foundation pit space enclosing structure; performing first-layer soil excavation in the foundation pit space enclosing structure, and mounting first-layer steel supports; performing second-layer soil excavation, and mounting second-layer steel supports; performing third-layer soil excavation and mounting third-layer steel supports; and according to the design requirements, dismantling a plurality of steel supports from the first-layer steel supports and / or second-layer steel supports, and synchronously mounting the plurality of steel supports into the third-layer steel supports. Under the premise of ensuring safety, reliability and reasonability in stress of the whole steel support structure, as part of steel supports of the first-layer steel supports and / or the second-layer steel supports are dismantled in advance, and the part of steel supports are synchronously mounted in the third-layer steel supports, turnover usage rate of steel supports is improved, usage amount of steel supports is saved, and engineering construction progress is accelerated. The construction method is applied to the technical field of construction of foundation pits.

Description

technical field [0001] The invention relates to the technical field of foundation pit construction, in particular to a construction method of a dynamic steel support system for deep foundation pits. Background technique [0002] The construction of high-rise building deep foundations, basements or underground structures in narrow urban areas requires the excavation of foundation pits. In order to prevent the excavation of foundation pits from causing safety impacts on the foundations of adjacent existing structures and ensure the safety and smooth construction of the project, it is often necessary to excavate foundation pits The foundation pit support structure is set up in order to ensure construction safety. [0003] Steel support is a commonly used support structure in foundation pit support structure. The installation and removal of steel support is convenient and fast, and it can play the role of support as soon as possible, reduce the time effect, and reduce the deform...

AI Technical Summary

Problems solved by technology

[0003] Steel support is a commonly used support structure in foundation pit support structure. The installation and removal of steel support is convenient and fast, and it can play the role of support as soon as possible, reduce the time effect, and reduce the deformation of the enclosure structure due to the increase of time effect , and can be reused, which is convenient for professional construction. However, using steel supports as a supporting structure requires a large amount of steel

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