›› 2014, Vol. 35 ›› Issue (S2): 495-500.

• Geotechnical Engineering • Previous Articles     Next Articles

Study of time effect on top-down excavation of Shanghai Zhongshan Hospital

WANG Guo-cui, LIANG Zhi-rong, WEI Xiang   

  1. Shenyuan Geotechnical Engineering Co., Ltd., Shanghai Xiandai Architectural Design Group, Shanghai 200040, China
  • Received:2014-05-08 Online:2014-10-31 Published:2014-11-12

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Abstract: In light of the effect of soft soil rheology, the time effect of rheology should be considered in excavation analysis. Due to the excavated and structural construction conditions, construction period is prolonged, therefore time effect is particularly significant in the construction process. For the project of Shanghai Zhongshan Hospital, the finite element model is built to simulate the construction process of top-down excavation of foundation pits. The calculated displacement of diaphragm wall and soil is compared to the measured one in various operating conditions during construction. The results show that the model can reasonably reflect the impact of excavation on the structure and the surrounding environment, and rationally simulate the time effect of excavation. The construction process of top-down excavation and the excavation period is relatively long, so the construction process and the construction time should be reasonable arranged to control the deformation of structure and soil and protect the surrounding environment.

Key words: foundation pit, top-down method, time effect, soil rheology

CLC Number: 

  • O 302
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