Internal and external support structure and construction method of building foundation pit

Abstract

The invention provides a building foundation pit internal and external supporting structure. The building foundation pit internal and external supporting structure comprises multiple anchor rods, oneends of the multiple anchor rods are fixed in a rock-soil body, and the other ends of the multiple anchor rods are fixed on a H-shaped supporting frame; the multiple anchor rods are divided into two rows, and the two rows of anchor rods and the rock-soil body are arranged in an isosceles triangle; the upper portion and the middle portion of the H-shaped supporting frame are fixedly connected withsupporting piles arranged on the rock-soil body through upper pressing rods and lower pressing rods correspondingly; and the H-shaped supporting frame is further connected with the supporting piles through supporting rods. According to the building foundation pit internal and external supporting structure, the problems that a foundation pit supporting structure cannot be repeatedly disassembled and utilized at the present stage, so that the resource utilization rate is declined to a certain extent, and saving of the construction cost is not facilitated are solved; and in the case of the building foundation pit internal and external supporting structure, the structure is fast to construct, the construction period is short, the device is effectively protected, the use amount of the anchor rods is reduced, the raw materials are saved, and the project cost is reduced.

Description

technical field [0001] The invention relates to the field of foundation pit support, in particular to an internal and external support structure of a building foundation pit and a construction method. Background technique [0002] During the construction of building foundation pits, in order to ensure construction safety and prevent landslide accidents, support measures must be taken for the excavated building foundation pits. The design and construction of building foundation pit support should comprehensively consider the engineering geological and hydrogeological conditions, foundation pit type, foundation pit excavation depth, drainage conditions and the surrounding environment's unique requirements on the foundation pit side wall, the surrounding load of the foundation pit and the service life of the support structure Reasonable design and careful construction are required. At present, two structural forms are generally used in the support structure of deep foundation ...

AI Technical Summary

Problems solved by technology

[0006] The invention provides an internal and external support structure of a building foundation pit, which solves the problem that the support structure of the foundation pit cannot be repeatedly disassembled and utilized at the present stage, wastes resource utilization to a certain extent, is not conducive to saving construction costs, and its structure is built quickly , The construction period is short, because the anchor rod and the rock and soil are not inserted vertically, not only reduces the scope of the anchor rod to disturb the soil layer, but also reduces the pressure of the rock mass on the anchor rod and the upper and lower rows of anchor rods and the H-shaped support frame Build a combination to achieve the support between each other and the support of the support piles, effectively protect the device, reduce the amount of anchor rods, save raw materials and reduce engineering costs; in addition, the anchor-type support structure and the support structure are combined Combined, a combined support structure system is formed, which is suitable for deep and large foundation pit projects. It not only increases the elastic fulcrum of the retaining structure, improves the axial tension of the anchor rod and the axial pressure value of the inner support, but also effectively guarantees the foundation pit engineering Quality and safety of excavation use

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