Construction method for constructing underground structures under buildings

Abstract

The invention provides a construction method for constructing an underground structure under a building. The construction method comprises the steps that underground enclosing structures are disposedaround the building; a plate-shaped tube curtain is formed in the position, within the scope of the underground enclosing structures, below the building; excavation openings are left between the flat-plate-shaped tube curtain and the underground enclosing structures; a soil body in the underground structure space to be constructed is excavated from top to bottom from the excavation openings; and back-building of the underground structure is performed from the bottom up. The construction method utilizes the formed flat-plate-shaped tube curtain, and the load on the tube curtain is reduced due to higher strength, rigidity and water-stop properties and fewer requirements on the soil body thickness on the lower part of the building; and better support are provided for the soil body on the upper part of the tube curtain and the soil body on the lower upper part of the building while expanding the underground structure space to be constructed. The structure formed by the method of forming the underground structure smoothly form bottom to up can be rich and complicated, the back-building structural quality can be guaranteed as a ground structure, and the construction efficiency is high and the speed is high.

Description

technical field [0001] The invention relates to the technical field of civil engineering construction, in particular to a construction method for constructing an underground structure under a building. Background technique [0002] There are several construction methods in the prior art for constructing underground structures without moving or destroying existing buildings, such as shield method, pipe jacking method, mine method, circular pipe curtain method (pipe shed method). The shield tunneling method and the pipe jacking method are construction methods in which the excavation equipment is advanced and followed by the prefabricated structure. The construction structure is mainly in the form of a tunnel, and the space and form of the structure are limited by the shape of the tunnel section, which is not suitable for complex underground structures. Construction; the mining method is a construction method for constructing tunnels by excavating underground tunnels. The minin...

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Problems solved by technology

[0003] An object of the present invention is to provide a construction method for constructing an underground structure under a building, so as to solve the problem of soil loss on the top of the roof under various unfavorable geological conditions, especially in soft ground, in the existing method, and it is difficult to guarantee the soil on the top of the roof. and building support

[0004] Another object of the present invention is to provide a construction method for constructing an underground structure under a building, so as to solve the problems that the existing methods cannot adapt to complex underground structure construction, and the quality of the underground structure and the safety during construction are difficult to guarantee

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