Modular foundation pit steel truss supporting structure

Abstract

The invention discloses a modular foundation pit steel truss supporting structure which is compose of a single row or a plurality of rows of plane truss structures. Each plane truss structure comprises basic structure units and edge components and is mainly formed by splicing the basic structure units. The basic structure units located at the edges of the two ends of the plane truss structure are connected with the edge components. Each plane truss structure is formed by splicing the basic structure units along a row. Every two adjacent basic structure units are connected through a middle connecting node, and the spliced basic structure units at the two ends are connected with the edge components through end connecting nodes. Each basic structure unit is composed of two chord members and a diagonal web member, wherein the two chord members are arranged in parallel and are connected into a whole through the diagonal web member. The modular foundation pit steel truss supporting structure has the stressing characteristics of being large in bending bearing capacity and large in anti-bending stiffness and meanwhile has the characteristics of being unified in specification of the basic structure, high in universality, high in reutilization rate, easy to transport and install on site and the like.

Description

technical field [0001] The invention relates to the technical field of building structure engineering, in particular to a modular foundation pit steel truss support structure. Background technique [0002] During the excavation of the foundation pit, the supporting structure in the foundation pit plays an important role in maintaining the stability of the foundation pit. The traditional foundation pit support structure adopts reinforced concrete structure, which has the disadvantages of slow construction speed, long maintenance time, and the need to dismantle it later, which is not conducive to energy saving and environmental protection. In contrast, the steel support structures that have emerged in recent years generally have the advantages of convenient construction, fast speed, prestressing, and reusability, which are in line with the national development concept of energy conservation and environmental protection. [0003] For the support structure of the foundation pit...

AI Technical Summary

Problems solved by technology

The existing foundation pit steel support structure still has certain problems, such as steel pipe support technology, which has problems such as dense plane layout and poor node performance. Although the joint performance of the steel composite support structure has been improved, the problem of dense plane layout has not been solved. good solution

[0004] Although from the point of view of the whole life cycle, the steel support is reusable, and the steel of the waste components can be recycled to produce new components, but due to the diversity of foundation pit forms, it is usually necessary to customize different component forms according to different situations and specifications, and the price of steel is relatively high, which makes the initial investment of the steel support structure of the foundation pit huge, and the utilization rate of some components is low, which seriously affects its popularization and use; for the straight side of the foundation pit, the edge of the foundation pit The earth pressure forms an approximately uniformly distributed pressure inward, which puts forward high requirements on the bending performance of the supporting structure in the foundation pit

Therefore, the prior art lacks a foundation pit support structure with strong versatility, high reusability and good bending resistance

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