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| MODIFIED MOBILIZABLE STRENGTH DESIGN(MSD) METHOD ON DEFORMATION PREDICTIONS OF FOUNDATION PIT |
| WANG Haoran1，2，WANG Weidong1，3，HUANG Maosong1，2，XU Zhonghua3 |
| (1. Department of Geotechnical Engineering，Tongji University，Shanghai 200092，China；2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education，Tongji University，Shanghai 200092，China；3. Department of Underground Structure and Geotechnical Engineering，East China Architectural Design and Research Institute Co.，Ltd.，Shanghai 200002，China) |
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Abstract Firstly，the mobilizable strength design(MSD) method for predicting deformation induced by excavation is introduced. The method cannot only use the strain-stress curve of site soil but also take the effect of heterogeneity and anisotropy of soil on undrained strength of soil into account. Then，after considering the undrained anisotropic shear strength of K0 normally consolidated soft clay and bending strain energy of retaining wall，the MSD method is modified. A numerical example is calculated by the modified MSD method in the end. The results calculated by the modified MSD method are compared with those calculated by finite element method(FEM) based on the MIT–E3 constitutive model and normal MSD method. It is shown that the results calculated by the modified MSD method are closer to those calculated by the FEM，which proves that the modified MSD method is more suitable for calculating deformation induced by excavation.
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Received: 10 May 2010
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2011, Vol. 30 
