Selection of soil constitutive models for numerical simulation of foundation pit excavation

被引：0
作者：
Song, Guang [1 ]
Song, Er-Xiang [1 ]
机构：
[1] Department of Civil Engineering, Tsinghua University
来源：
Song, E.-X. (songex@mail.tsinghua.edu.cn) | 1600年 / Tsinghua University卷 / 31期
关键词：
Constitutive model; Foundation pit excavation; Numerical simulation; Pressure-sensitivity; Stress-path;
D O I：
10.6052/j.issn.1000-4750.2012.08.0583
中图分类号：
学科分类号：
摘要：
One of the key points in numerical simulation of foundation pit excavation is to select a proper soil costitutive model. The main stress-path in soil affected by deep excavation has been analyzed. And it is noted that a proper soil constitutive model should be able to consider the deformation characteristics of unloading stress-path and stress-dependent stiffness reasonably. Several soil constitutive models commonly used in geotechnical numerical analysis are discussed. The suitability of these constitutive models used in numerical analysis of deep excavation is examined through simulating some stress path triaxial tests and analyzing some typical excavation projects. The Hardening Soil Model uses a stress-dependent stiffness, different for loading and un-/reloading. Both deformation of the foundation pit support structures and the settlement of ground can be predicted well by using this model, thus it is recommended for use in numerical analyses of deep excavations.
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页码：86 / 94
页数：8
相关论文
共 17 条
  • [1] Potts D.M., Axelsson K., Grande L., Et al., Guidelines for the Use of Advanced Numerical Analysis, (2002)
  • [2] Xu Z., Wang W., Selection of soil constitutive models for numerical analysis of deep excavations in close proximity to sensitive properties, Rock and Soil Mechanics, 31, 1, (2010)
  • [3] Song E., Qiu Y., Finite element analysis of composite soil nailing for excavation support, Rock and Soil Mechanics, 22, 3, pp. 241-245, (2001)
  • [4] Zai J., Zhang Y., Wang X., Chang Y., Experimental research on deformation and strength of cohesive soil under lateral extension, Chinese Journal of Geotechnical Engineering, 29, 9, pp. 1409-1412, (2007)
  • [5] Ge W., Research on lateral unloading stress path and wall deformation, (2001)
  • [6] Liu G., Hou X., Unloading modulus of the shanghai soft clay, Chinese Journal of Geotechnical Engineering, 18, 6, pp. 18-23, (1996)
  • [7] Zhou E., Application of hardening soil model with small-strain in deformation analysis for foundation pit, (2010)
  • [8] Nakai T., An isotropic hardening elastoplastic model considering the stress path dependency in three dimensional stresses, Soils and Foundations, 29, 1, pp. 119-139, (1989)
  • [9] Green G.E., Bishop A.W., A note on the drained strength of sand under generalized strain conditions, Geotechnique, Technical Note, 19, 1, pp. 144-149, (1969)
  • [10] Sutherland H.B., Mesdary M.S., The influence of the intermediate principal stress on the strength of sand, Proceedings of the 7th ICSMFE, 1, pp. 391-399, (1969)
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