硬化土模型在无锡地区深基坑工程中的应用与分析

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摘要深基坑工程开挖规模大、深度深、应力路径复杂，土体本构模型的选取是深基坑工程数值计算和分析的关键。在对硬化土(HS)模型及模型参数进行理论分析的基础上，基于室内不同应力路径试验，确定无锡地区典型土层的HS模型参数。以三维Z_Soil软件对无锡地铁2号线车站基坑与紧邻恒隆基坑的施工过程进行数值分析，计算结果与实测数据吻合较好。研究表明，HS模型不仅能够反映土体应力、应变的非线性特性，还能够反映深基坑工程复杂的应力路径。无锡地区土质较硬，土体本构模型适合HS模型，由试验确定的HS模型参数可用于无锡地区深基坑工程的计算分析，同时也说明本文所采用数值计算方法的可靠性。

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关键词 ：土力学, 无锡地区, 深基坑工程, HS模型, 模型参数, 应力路径

Abstract：The deep foundation pit is characterized by large-scale excavation，deep excavation depth and complex stress path. The choice of soil constitutive model is the key to numerical analysis of deep foundation pit. On the basis of theoretical analysis of hardening soil(HS) model and model parameters，HS model parameters of the typical soil in Wuxi district are determined through different stress paths experiments in laboratory. Numerical analyses for construction process of station foundation pit in #2 line of Wuxi metro and Henglong foundation pit are performed using three-dimensional Z_Soil software，and numerical results are in good agreement with actual monitoring data. Research shows that HS model can reflect not only the nonlinear characteristics of soil′s stress and strain，but also the complex stress path of deep foundation pit. HS model is suitable for the hard soil in Wuxi district，and the HS model parameters decided by experiment can be applied to calculation of deep foundation pit in Wuxi district，and the numerical method is reliable.

Key words： soil mechanics Wuxi district deep foundation pit hardening soil(HS) model model parameters stress path

收稿日期: 2013-08-13

引用本文:

刘书斌1，王春波2，3，周立波1，唐志成4. 硬化土模型在无锡地区深基坑工程中的应用与分析[J]. 岩石力学与工程学报, 2014, 33(sl): 3022-3028.
LIU Shubin1，WANG Chunbo2，3，ZHOU Libo1，TANG Zhicheng4. APPLICATION AND ANALYSIS OF HARDENING SOIL MODEL IN DEEP FOUNDATION PITS IN WUXI DISTRICT. , 2014, 33(sl): 3022-3028.

链接本文:

http://www.rockmech.org/CN/Y2014/V33/Isl/3022

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