巨型黄土滑坡剪出口滑带土的原位剪切试验研究  

In situ shear experiment on the shear crack of giant loess landslide

作　　者：罗丽娟[1] 赵法锁[2] 陈新建[2] 赵振荣[1] 朱启东[1] 

机构地区：[1]长安大学建工学院,陕西西安710061 [2]长安大学地测学院,陕西西安710054

出　　处：《西安科技大学学报》2009年第4期459-464,共6页Journal of Xi’an University of Science and Technology

基　　金：国家自然科学基金面上项目(40872185);长安大学科学基金项目(06Q14)

摘　　要：针对某巨型黄土滑坡的工程地质现状,在滑坡剪出口3个不同位置切削尺寸为500mm×600mm×800mm的土柱体进行了天然状态和饱水状态2种工况下的残余剪切试验,获得相应的残余抗剪强度指标。通过与滑带土同工况下的室内实验强度指标对比,发现原位剪切试验获得的内聚力和内摩擦角较室内实验指标高13.06%和24.64%,并分析了试验结果差异的原因,最后总结了黄土滑坡原位剪切试验过程中的注意事项。试验研究表明巨型滑坡滑带土的大型原位剪切试验对滑坡稳定性分析和工程治理优化具有重要价值。Based on the engineering geological analysis of giant loess landslide, three soil samples with the size of 500 mm × 600 mm × 800 mm were cut on the shear crack of landslide. The residual shear experiment of soil samples were finished in native state and saturated state. Compared with the residual co- hesive force and residual internal friction angle of slide face soil in saturated state by indoor shear experiment and in situ shear experiment, that of landslide shear crack soil in saturated state by in situ shear experiment is greater with degree of 13.06% and 24.64% than that by indoor shear experiment. The reason of difference between two experimental methods is proposed. It shows that in situ experiment is important to the landslide stability analysis and the optimization of landslide engineering treating, especially to the giant landslide.

关 键 词：黄土滑坡 原位剪切试验 剪出口 巨型滑坡 

分 类 号：P642.22[天文地球—工程地质学]