水文地质工程地质2012，Vol.39Issue(2)：79-84,6.
考虑土体硬化的基坑开挖性状及隆起稳定性分析
Investigation of excavation characters and basal stability with considering soil hardening behavior
摘要
Abstract
The stress path of soil in excavation is different from that of loading and unloading. The computed retaining wall displacement and basal heave and peripheral ground settlement may be inaccurate with adopting normal ideal elastoplastic model of soil. The soil properties in different excavation zones were analyzed, and the hardening soil model was adopted to simulate the influence of excavation unloading and soil hardening. An actual excavation was numerically analyzed using finite element method, the earth pressure on retaining wall and lateral displacements of retaining wall were computed and compared with measured data. In addition, the stability of excavation was analyzed with adopting strength reduction FEM. The results show that the numerical analysis with adopting hardening soil model can reflect unloading/reloading and hardening characters of soil, the computed results of earth pressure on retaining wall, lateral retaining wall displacements and basal stability factors coincide with experiential results of excavation in soft ground.关键词
基坑工程/土体硬化模型/开挖卸载/土体性状/有限元强度折减法Key words
excavation engineering/ hardening soil model/ unloading/ soil properties/ strength reduction FEM分类
建筑与水利引用本文复制引用
张飞,李镜培,唐耀..考虑土体硬化的基坑开挖性状及隆起稳定性分析[J].水文地质工程地质,2012,39(2):79-84,6.基金项目
上海市科委科技攻关计划(09231200900) （09231200900）
