岩土力学2013，Vol.34Issue(6)：1766-1774,9.
上海地区基坑开挖数值分析中土体HS-Small模型参数的研究
Study of parameters of HS-Small model used in numerical analysis of excavations in Shanghai area
摘要
Abstract
Numerical analysis has become the most important method for analyzing and predicting the deformation of excavations in close proximity to sensitive properties.One of the key problems in a numerical analysis is to select proper soil constitutive models and their corresponding parameters.HS-Small model including HS model parameters and small strain parameters is suitable for numerical analysis of deep excavations because HS-Small model can not only reflect shear and compression hardening but also account for shear modulus attenuating with strain in tiny strain range.However,it is difficult to obtain the whole set of parameters of HS-Small model.Parameters of HS model which determined by soil tests are firstly checked through numerical analysis of five excavation histories in Shanghai area.Determination of some parameters of HS-Small model is then modified based on parameter sensitivity analysis.The most sensitive parameter is determined by back analysis of the field measurements of five case histories.Validity of the whole set of parameters of the HS-Small model is verified by numerical analysis of several typical excavations in Shanghai.关键词
HS-Small模型/参数/基坑/环境影响/数值分析Key words
HS-Small model / parameters / foundation pit / environmental impact / numerical analysis分类
建筑与水利引用本文复制引用
王卫东,王浩然,徐中华..上海地区基坑开挖数值分析中土体HS-Small模型参数的研究[J].岩土力学,2013,34(6):1766-1774,9.基金项目
上海市青年科技启明星计划B资助项目(No.11QB1400400) （No.11QB1400400）
国家科技支撑计划(No.2012BAJ01B02). （No.2012BAJ01B02）
