基于颗粒流法的粘性匀质土坡稳定性分析  

Stability Analysis of Cohesive Homogenous Soil Slope Based on Particle Flow Method

作　　者：贺续文[1] 刘忠[1] 廖彪[1] 

机构地区：[1]湘潭大学土木工程与力学学院,湖南湘潭411105

出　　处：《路基工程》2011年第1期57-59,63,共4页Subgrade Engineering

摘　　要：采用颗粒流法对粘性匀质土坡失稳破坏全过程进行数值模拟,无需假定材料的本构关系及土坡滑裂面位置和形状,直接从细观上定义颗粒之间的接触关系,通过模拟双轴试验,将土体的宏、细观参数联系起来,从细观层面上分析土坡的破坏机理。结果表明,当粘结强度减小到一定程度时,土坡失稳;土坡由于自身强度不足而发生的失稳破坏,一般表现为上部拉裂、中部剪切、底部挤压的破坏形式。The whole process of destabilization and failure of cohesive homogenous soil slope is simulated using particle flow method. It is unnecessary to assume the constitutive relation of material and the position and shape of slope sliding surface. The micro contact relation between particles can be defined directly. Through simulation of biaxial test, the macro and micro soil parameters are integrated to analyze the failure mechanism of soil slope from micro aspect. It is indicated that when bonding strength reduces to a certain degree, soil slope is destabilized. Upper crack, central shear and bottom compaction are the common failure modes of soil slope due to insufficient strength.

关 键 词：颗粒流 土坡失稳 滑裂面 粘结强度 

分 类 号：U416.16[交通运输工程—道路与铁道工程]