| With the rapid development of society, the urban upground space could not meet the demand of economic development, more and more deep foundation pits are formed by the exploitation of underground space. Due to the complex and uncertainty of rock and soil mass, the deformation of rock and soil mass and supporting structure in deep foundation pit excavation and supporting can not be accurately solved. The traditional strength control theory and construction design method can not meet the demand of requirements of foundation pit design any longer.Based on the previous research results and classical soil mechanics, this paper has an theoretical analysis of stress of soils, soil strain and deformation, mechanical effect of soil mass by the combined pile-anchor supporting. Combining foundation pit with supporting structure, and using the professional finite element numerical simulation software Midas/GTS to analyse the process of excavation unloading and combined pile-anchor supporting of the foundation pit in Fuyuan of Yunnan province. This article has a concrete simulation of stress-strain behaviors, horizontal deformation of lateral walls of foundation pit, the soil rebound of pit bottom and the ground settlement of pit boundary, and at last, it summarized the changing law of them and get some significant conclusion of foundation pit construction design. |
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