The Evaluation of Deformation Induced by Excavation Considering the Properties of Diaphragm-Soil Interface

doi:10.16183/j.cnki.jsjtu.2006.12.022

Abstract

Abstract:

A three-dimensional finite element method by considering the properties of the diaphragm wall-soil interface was applied to analyze the excavation of a deep foundation pit in Shanghai soft ground. The simulation results were compared with the monitoring data as well as the simulation results without diaphragm wall-soil contact. The influence of diaphragm-soil interface on the deformation analysis of excavation was discussed. The results of simulation considering the properties of the diaphragm-soil interface show closer agreement with the measure ment data. Moreover, the model without diaphragm wall-soil contact generally gets smaller wall deformation and induced ground movement.

Key words: deep excavation, diaphragm wall-soil interface, deformation, finite element method

CLC Number:

TU470.3

FAN Wei, WANG Jian-hua, CHEN Jin-jian. The Evaluation of Deformation Induced by Excavation Considering the Properties of Diaphragm-Soil Interface[J]. Journal of Shanghai Jiao Tong University, 2006, 40(12): 2118-2121.

Figures/Tables 5

Fig. 1

Fig. 2

Tab. 1

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Fig. 4

References 5

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土层	层厚/m	重度/(kN·m^-3)	φ/(°)	孔隙比	λ	κ	M	μ		f_s/kPa
土层	层厚/m	重度/(kN·m^-3)	φ/(°)	孔隙比	λ	κ	M	主动侧	被动侧	f_s/kPa
1-1 杂填土	1.78	-	-	-	-	-	-	-	-	-
2-3 砂质粉土	7.45	18.8	22.60	0.91	0.056	0.006	0.882	0.174	0.259	15
4 淤泥质粘土	8.85	17.2	8.60	1.38	0.104	0.008	0.315	0.064	0.096	24
5 粉质粘土	6.60	18.5	15.50	0.98	0.086	0.007	0.587	0.110	0.165	50
6 粉质粘土	3.70	20.0	13.80	0.68	0.035	0.003	0.518	0.105	0.156	80
7-1 砂质粉土	4.70	18.9	22.80	0.86	0.044	0.003	0.890	0.174	0.259	90
7-2 粉细砂	-	19.2	25.40	0.77	0.025	0.002	1.001	0.208	0.309	100

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