传递系数法中条块间应力的探讨  

DISCUSSION OF INTER-SLICE ACTION IN TRANSMITTING COEFFICIENT METHOD

作　　者：易朋莹[1,2] 邓时义 吕涛 

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]重庆市高新工程勘察设计院有限公司,重庆401121 [3]四川宏扬建筑集团有限公司,资阳641500 [4]重庆市交通规划勘察设计院,重庆401121

出　　处：《工程地质学报》2012年第4期478-482,共5页Journal of Engineering Geology

基　　金：国家杰出青年科学基金(50625824);重庆市科委重点攻关项目(CSTC 2006AB7003)

摘　　要：根据对传递系数法条块间作用力性质及与主动土压力和被动土压力关系进行的分类,揭示了其中3类计算成果与条块间的实际应力状态不符,分析成果偏危险。结合Mohr-Coulomb屈服准则,分析了问题原因,并求解了条块间应力的极限值。结论表明:当条块间作用力小于主动土压力时后侧条块发生主动破坏,条块间作用力应采用主动土压力,当作用力大于被动土压力时前侧条块将发生被动破坏,条块间作用力采用被动土压力,并将研究成果运用到工程案例。The inter-slice action of transmitting coefficient method is classified according to its properties and the relationship among the inter-slice action and active earth pressure and passive earth pressure. This paper reveals that the three types of calculation results discord with the real stress state, which is more dangerous. The reason for the problem is analyzed. The limit value of the inter-slice stress is solved with the Mohr-Coulomb yield criterion.The finding shows that the rear slice can occur active destruction when the inter-slice action is less than the active earth pressure. So the inter-slice action should take active earth pressure. The anterior slice can occur passive destruction when the inter-slice action is more than the passive earth pressure. So the inter-slice action should take passive earth pressure. The research results are applied to engineering cases.

关 键 词：传递系数法 MOHR-COULOMB 主动土压力 被动土压力 下滑力 

分 类 号：TU457[建筑科学—岩土工程]