P_5含量对滑坡体砾质土的力学性质影响试验研究  

Study on the Test of P_5 Content Affecting Mechanical Property of Gravelly Soil in Landslide

作　　者：左永振[1] 张婷[1] 丁红顺[1] 

机构地区：[1]长江科学院水利部岩土力学与工程重点实验室,湖北武汉430010

出　　处：《西北地震学报》2011年第B08期223-226,共4页Northwestern Seismological Journal

基　　金：国家科技支撑项目(2008BAB29B02)

摘　　要：粗粒含量对滑坡体砾质土的力学性质具有重要意义。针对乌东德水电站金坪子滑坡体砾质土拟合了5条不同P5含量的试验级配,分别进行饱和状态与非饱和状态的固结排水剪切试验。试验表明,两种试验条件下的变形参数和强度参数均较高,变形参数k值与kb总体上随P5含量的增大而增大;P5含量越高粗颗粒的骨架作用越强,试样的模量越大。砾质土饱和状态的内摩擦角和变形参数低于非饱和状态,说明试样浸水饱和会使强度模量降低,降雨将降低滑坡体的稳定性。The Coarse-grained content has important meaning to the mechanical properties of gravelly soil in landslide.For the gravelly soil on Jinpingzi landslide at Wudongde hydroelectric power station,five different P5 contents of test gradation are given to carry on saturated type and non-saturated type consolidated drained test.The result indicates that the deformation and intensive parameters in both conditions are higher,the K and Kb value of in deformation parameters increase with the P5 content increasing,the coarse particles skeleton function is stronger with higher P5 content,and the test specimen module is bigger.The internal friction angle and deformation parameters of saturated type are lower than the non-saturated type,indicating that soaked saturated sample will reduce the strength modulus,in the engineering application meaning that the rainfall will reduce the stability of landside.

关 键 词：砾质土 滑坡体 P5含量 试验 力学性质 

分 类 号：TU411.3[建筑科学—岩土工程]