基于材料状态相关剪胀性的土坡稳定分析极限平衡法  

Stability analysis of soil slope by limit equilibrium method considering dilatancy based on material state-dependent critical state

作　　者：贾苍琴[1] 黄茂松[2] 王贵和[1] 

机构地区：[1]中国地质大学工程技术学院,北京100083 [2]同济大学地下建筑与工程系,上海200092

出　　处：《岩土力学》2009年第S2期149-153,共5页Rock and Soil Mechanics

基　　金：国家自然青年科学基金项目(No.40902085);国家自然科学基金项目(No.50579051);中国地质大学(北京)科学技术基金资助(No.200704)

摘　　要：土体剪胀性对土坡稳定性分析的结果有较大的影响,而在传统的极限平衡法中无法考虑土体的剪胀性。以Toyoura砂为例,通过基于材料状态相关临界状态理论的本构模型,确定了摩擦角与剪胀角之间的关系,然后将采用等效摩擦角的方式用于土坡稳定的极限平衡法分析中,提出了一种基于材料状态相关剪胀性的极限平衡法,并通过算例说明在极限平衡法中考虑剪胀角对正确评价土坡稳定性是很重要的。There is more important effect of dilatancy of soils on the slope stability;however,the dilatancy is not considered in the traditional limit equilibrium method.The relationship between friction angle and dilatant angle determined by the material state-dependent critical state constitutive model,then the slope stability is analyzed by the limit equilibrium method with the equivalent friction angle considering the dilatancy of soils.The case studies show that it is very important to analyze the influence of dilatancy on the slope stability in the limit equilibrium method.

关 键 词：材料状态相关 临界状态 剪胀性 土坡稳定分析 极限平衡法 

分 类 号：TU43[建筑科学—岩土工程]