Variable-rigidity foundation pit support structure

Abstract

A variable-rigidity foundation pit support structure comprises a first plastic plate and at least two second plastic plates. The two ends of the first plastic plate are connected with one ends of the corresponding second plastic plates correspondingly to form downward folded corners. The other ends of the corresponding second plastic plates are connected with the rest of the second plastic plates. The first plastic plate and the second plastic plates are connected to form an inverted-L-shaped structure used for being arranged in a foundation pit. The first plastic plate and the second plastic plates are each provided with a hollow structure used for buffering. The whole inverted-L-shaped structure is inserted into the ground of the foundation pit along the wall face of the foundation pit. The variable-rigidity foundation pit support structure has the main beneficial effects that the middles of the plastic plates are hollowed, the pressure of the foundation pit on an enclosure plate is effectively resisted, rigidity variability is utilized better, rigidity changes along with changes of loads, and a good toppling prevention effect is achieved; and the plates are connected in a plug manner, the structure is much simpler, but the effect is the same. The variable-rigidity foundation pit support structure is suitable for being used for a support system of the foundation pit.

Description

technical field [0001] The invention relates to a foundation pit support structure with variable stiffness. Background technique [0002] The foundation pit support project is a temporary project, and the safety reserve in the design can be relatively small, but it is related to the region. Geological conditions in different regions have different characteristics. The foundation pit support is to ensure the safety of the underground structure construction and the surrounding environment of the foundation pit, and the support, reinforcement and protection measures are adopted for the side wall of the foundation pit and the surrounding environment. Common support forms include row piles, underground diaphragm walls, steel sheet piles, soil nail walls, cement retaining walls, inverted arch walls, composite structures, etc. [0003] Publication number is that the Chinese patent of CN203891032U discloses a kind of combination structure of rotary grouting pile and miniature stee...

AI Technical Summary

Problems solved by technology

Although the pile body has a deeper insertion depth and higher rigidity and strength through sparse row piles, and the boundary constraints are strengthened, but the process is too complicated, the construction requirements are high, and the bending capacity of the material is low

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