Analysis of Deformation Properties of Subway Station Foundation Pit in Soft Soil with High Creep Property

Abstract

Abstract:

In order to investigate the effect of soft soil with strong creep resistance on the deformation during construction, based on the foundation pit engineering of the South East Outer Ring Road Station in Ningbo, the deformation of the building envelope and the external surface subsidence were analyzed. The results show that the effect of the foundation excavation on the deformation of the building envelope and the external surface subsidence has an obvious time effect. So the time of deeper soil excavation should be strictly controlled followed by timely erection of support and pouring of concrete floor. Meanwhile, the deformation and longterm displacement of the pit were calculated by combining the finite element modeling (FEM) with the displacement aging coefficient and taking the strong creep resistance into account. The numerical results conform to the monitored results,
which verifies the feasibility of the method, and provides reference for similar excavation engineering.

Key words: soft soil, excavation engineering, high creep property, finite element modeling (FEM) simulation, long-term displacement

CLC Number:

TU 447

ZHOU Kunpeng1a,WANG Yingyi1b,ZHU Jiwen2,HUANG Xingchun1a,1b. Analysis of Deformation Properties of Subway Station Foundation Pit in Soft Soil with High Creep Property[J]. Journal of Shanghai Jiaotong University, 2013, 47(09): 1413-1418.

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