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)
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.
徐中华,王建华,王卫东. 软土地区采用灌注桩围护的深基坑变形性状研究[J]. 岩土力学,2009,30(5):1 362-1 366.(XU Zhonghua,WANG Jianhua,WANG Weidong. Deformation behavior of deep excavations retained by bored pile wall in soft soil[J]. Rock and Soil Mechanics,2009,30(5):1 362-1 366.(in Chinese))
Your browse does not support frame! " target="_blank">
[7]
O?ROURKE T D. Base stability and ground movement prediction for excavations in soft clay[C]// Proceedings of International Conference on Retaining Structure. Thomas Telford,London:[s. n.],1992:657-686.
Your browse does not support frame! " target="_blank">
王立忠,叶盛华,沈恺伦,等. K0固结软土不排水抗剪强度[J]. 岩土工程学报,2006,28(8):970-977.(WANG Lizhong,YE Shenghua,SHEN Kailun,et al. Undrained shear strength of K0 consolidated soft clays[J]. Chinese Journal of Geotechnical Engineering,2006,28(8):970-977.(in Chinese))
[15]
CLOUGH G W,O?ROURKE T D. Construction induced movements of in situ walls[C]// Proceedings of Specialty Conference on Design and Performance of Earth Retaining Structures. New York:[s.n.],1990,439-470.
Your browse does not support frame! " target="_blank">
徐中华,王建华,王卫东. 上海地区深基坑工程中地下连续墙的变形性状[J]. 土木工程学报,2008,41(8):81-86.(XU Zhonghua,WANG Jianhua,WANG Weidong. Deformation behavior of diaphragm walls in deep excavations in Shanghai[J]. China Civil Engineering Journal,2008,41(8):81-86.(in Chinese))
Your browse does not support frame! " target="_blank">
OU C Y,LIAO J T,LIN H D. Performance of diaphragm wall constructed using top-down method[J]. Journal of Geotechnical and Geoenvironmental Engineering,ASCE,1998,124(9):798-808.
Your browse does not support frame! " target="_blank">
[6]
OSMAN A S,BOLTON M D. Ground movement predictions for braced excavations in undrained clay[J]. Journal of Geotechnical and Geoenvironmental Engineering,ASCE,2006,132(4):465-477.
Your browse does not support frame! " target="_blank">
黄茂松,宋晓宇,秦会来. K0固结黏土基坑抗隆起稳定性上限分析[J]. 岩土工程学报,2008,30(2):250-255.(HUANG Maosong,SONG Xiaoyu,QIN Huilai. Basal stability of braced excavations in K0- consolidated soft clay by upper bound method[J]. Chinese Journal of Geotechnical Engineering,2008,30(2):250-255.(in Chinese))
[13]
LADD C C,EDGERS L. Consolidated-undrained direct simple shear tests on Boston blue clay[R]. Cambridge:Department of Civil Engineering,Massachusetts Institute of Technology,1972.
Your browse does not support frame! " target="_blank">