应变速率对含砾滑带土抗剪强度影响研究  

Influence of strain rate to the shear strength of conglomeratic sliding-zone soil

作　　者：高旭[1] 晏鄂川[1] 崔学杰[1] 

机构地区：[1]中国地质大学(武汉)工程学院,湖北武汉430074

出　　处：《水文地质工程地质》2016年第1期94-98,共5页Hydrogeology & Engineering Geology

基　　金：国家自然科学基金项目资助(41172282)

摘　　要：在三轴实验中所得滑坡滑带土强度结果既受实验方法影响,也与不同的实验条件和应变速率密切相关。以某滑坡为例,结合室内试验,基于蒙特卡洛原理建立含砾滑带土数值试验模型,揭示不同应变速率下滑带土强度特性的响应规律,并建立反映不同应变速率下滑带土强度预测模型。结果表明,不同应变速率下抗剪强度值差异明显,呈现明显的分区性(相对高应变速率区和相对低应变速率区),各区中应变速率对抗剪强度值的影响不同。The results of triaxial shear experiments are influenced by experimental methods,and are closely related to the different experimental conditions and the loading rate. Taking a landslide as an example and combined with laboratory tests,this paper establishes a conglomeratic sliding-zone soil numerical test model and reveals different strain rate declines with the dynamic response rules of soil strength characteristics. The shear strength prediction model is also established. The results show that the values of the shear strength under different strain rates are markedly different,and show obvious zoning characteristics（ high strain rate and low strain rate）. The strain rate in different districts has different influences for the shear strength values.

关 键 词：滑带土 三轴实验 抗剪强度 应变速率 

分 类 号：TU411.7[建筑科学—岩土工程]