硬化土模型在无锡地区深基坑工程中的应用与分析

发布时间：2018-08-02 20:15

【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。
[Abstract]:Deep foundation pit excavation has large scale, deep depth and complex stress path. The selection of soil constitutive model is the key to the numerical calculation and analysis of deep foundation pit engineering. Based on the theoretical analysis of HS model and model parameters, the HS model parameters of typical soil layers in Wuxi area are determined based on the indoor different stress path tests. Three Dimensional Z_Soil software is used to analyze the construction process of the foundation pit of Wuxi Metro Line 2 and the construction process of the foundation pit adjacent to the constant long foundation pit. The calculated results are in good agreement with the measured data. The study shows that the HS model can not only reflect the nonlinear characteristics of soil stress and strain, but also reflect the complex stress path of deep foundation pit engineering. The soil quality in Wuxi area is hard, The soil constitutive model is suitable for the HS model. The HS model parameters determined by the test can be used for the calculation and analysis of deep foundation pit engineering in Wuxi, and the reliability of the numerical calculation method used in this paper is also explained.
【作者单位】：无锡地铁集团有限公司;同济大学地下建筑与工程系;同济大学岩土及地下工程教育部重点实验室;武汉大学土木建筑工程学院;
【基金】：无锡市科技计划资助项目(092167) 国家青年科学基金资助项目(51008156)
【分类号】：TU470

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