Fluid-Structure Coupling Analysis of Dewatering and Excavation in 500 kV Shanghai Expo Underground Substation

doi:10.16183/j.cnki.jsjtu.2010.06.001

Abstract

Abstract:

On the background of 500 kV Shanghai Expo underground substation, a fluid-structure coupling FEM analysis of dewatering and excavation was made based on the Biot's consolidation theory. A pumping test was simulated to determine soil parameters by back-analysis of displacement and pore pressure. A fluid-structure coupling model was built to analyze dewatering and excavation with steady analysis method and birth-death element method respectively. Seepage and stress fields were solved at the same time. With comparison of the calculated and measured values, the fluid-structure coupling method used in the analysis of dewatering and excavation was proved to be correct and feasible.

Key words: fluid-structure coupling, pumping test, dewatering in excavation, finite element mathod (FEM)

CLC Number:

TU473.3

LIU Jing, CHEN Jin-jian, WANG Jian-hua. Fluid-Structure Coupling Analysis of Dewatering and Excavation in 500 kV Shanghai Expo Underground Substation[J]. Journal of Shanghai Jiao Tong University, 2010, 44(06): 721-725.

Figures/Tables 12

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References 6

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土层编号	层厚/m	γ/ (kN·m^-3)	E/MPa	k/ (mm·s^-1)	K₀
①, ②	3.1	18.8	15	3.5×10^-4	0.66
③	7.0	17.8	20	3.5×10^-3	0.56
④	7.0	17.2	25	8.0×10^-5	0.69
⑤_1-1	9.6	18.2	30	5.0×10^-6	0.64
⑤_1-2	4.0	19.6	35	3.3×10^-5	0.63
⑦₁	6.5	19.1	40	2.6×10^-2	0.55
⑦₂	8.3	19.3	50	3.8×10^-2	0.53
⑧₁, ⑧₂	27.8	18.5	80	3.8×10^-3	0.64
⑧₃	4.0	19.4	100	0.3	0.59
⑨₁	4.9	18.6	300	0.3	0.50
⑨₂	27.8	16.7	500	0.3	0.47