基于原位直剪试验的坡积含泥角砾碎石抗剪强度参数探究  

Study on Shear Strength Parameters of Landslide Mud-bearing Breccia Gravel Based on In-situ Direct Shear Test

作　　者：杨运林 YANG Yunlin(Geological Engineering Survey in Fujian Province,Fuzhou 350002,China)

机构地区：[1]福建省地质工程勘察院,福州350002

出　　处：《路基工程》2024年第6期87-93,共7页Subgrade Engineering

摘　　要：以福建某滑坡的滑体坡积含泥角砾碎石为例,采用原位直剪试验方法获取其抗剪强度参数,并做适当修正。结果表明:采用修正后的参数进行滑坡稳定性计算时,其稳定性系数为0.971~1.129,与现场滑坡状态基本一致,较通常按0.950~1.050的反算系数更具精确性;采用原位直剪试验方法获取含有角砾碎石等粒径较大的滑坡体抗剪强度参数,可使治理设计更合理。Taking the mud-bearing breccia gravel of a landslide in Fujian as an example,the shear strength parameters were obtained by in-situ direct shear test method.The appropriately modified parameters are used to calculate the landslide stability and get the stability coefficient of 0.971-1.129,which is basically consistent with the on-site landslide state,and is more accurate than the inverse calculation coefficient of 0.950-1.050.The in-situ direct shear test method is adopted to obtain the shear strength parameters of the landslide body with large particle size such as breccia gravel,which can make the treatment design more reasonable.

关 键 词：坡积含泥角砾碎石 原位直剪试验 抗剪强度参数 稳定系数 滑坡治理 

分 类 号：P642.22[天文地球—工程地质学]