Anti-floating structure of shallow covering subsurface structure and construction method of anti-floating structure

Abstract

The invention discloses an anti-floating structure of a shallow covering subsurface structure and a construction method of the anti-floating structure. The anti-floating structure of the shallow covering subsurface structure comprises partially thickened side walls, enclosing piles and anti-floating beams. Anti-floating beam bending reinforcing steel bars are embedded in the position, located on the upper part of a bottom plate, of the enclosing piles, the anti-floating beam bending reinforcing steel bars are located between spiral bars and stiffening bars of the enclosing piles and are weldedto main reinforcement of the enclosing piles, anti-floating beams are poured in the anti-floating beam bending reinforcing steel bars, pit wall plain concrete is poured in the tops of the anti-floating beams, and tunnel side walls, a middle plate and a top plate are constructed on the position, located in the enclosing piles, of the upper part of the bottom plate in sections. According to the anti-floating structure of the shallow covering subsurface structure, a space is not required to be additionally arranged at the top of the structure, and the anti-floating structure of the shallow covering subsurface structure is only required to be overhung outwards and extend at two side edges of the structure, so that the increased foundation pit excavation width and enclosure range caused by theconstruction of anti-floating toes is greatly reduced, and the construction cost is reduced; thickness is increased by using subsurface structure partial side walls with a waist rail anti-floating design, the calculation of corner bending moment and shear force is convenient, and the local reinforcement is reduced; the locally thickened side wall at the top plate and the anti-floating beams transmit pressure through the plain concrete, and settlement can be controlled when the foundation unevenly settles.

Description

technical field [0001] The invention relates to the technical field of underground structure engineering, in particular to an anti-floating structure of a shallow-covered underground structure and a construction method thereof. Background technique [0002] With the continuous development of urban construction, the development and construction of urban underground space has been paid more and more attention, and various underground projects such as comprehensive pipe corridors, urban underground ring roads, vehicle communication passages, and street crossing tunnels are increasing in many cities. In order to reduce the project cost, underground engineering construction generally adopts shallow burial as much as possible. Underground structural engineering, especially the joints of feed, discharge, ventilation, escape, etc. of integrated pipe corridors, often encounter working conditions with shallow covering soil during design. In areas with a high groundwater level, due to...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of anti-floating structure and construction method of shallow overburden underground structure, to solve the anti-floating problems of large-span and shallow overburden underground structures such as integrated pipe gallery nodes in the above-mentioned prior art, and overcome the existing anti-floating structure. Floating technical measures: anti-lift piles and anti-floating anchors are expensive and difficult to construct; only using anti-floating toes takes up a lot of land, excavating a large amount of earthwork, and high construction costs, which will also cause pipeline relocation and traffic diversion; shallow covering soil conditions Difficulties such as the inability to set up the top beam

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