黄土坡滑坡滑带土室内直接剪切特性研究

The Shear Strength Parameters of Huangtupo Landslide Slid Zone Soils Based on the Direct Shearing Test

滑带土的抗剪强度指标是滑带土在外力作用下抵抗剪切破坏的极限强度,是滑坡稳定性分析和治理工程设计的最基本、最重要的参数。直接快剪试验以其操作简单、原理明确被认为是用来检测土的抗剪强度的一种有效方法。基于直接快剪原理对三峡库区黄土坡滑坡滑带土进行了室内剪切试验,通过试验获得了滑带土的抗剪强度参数,并分析了不同含水率、不同粒径下滑带土的剪切特性变化规律,为后续对滑带土直剪试验的数值模拟与黄土坡滑坡稳定性分析与评价提供参考。

The shear strength parameters of slip zone soils is the ultimate strength of soils resisting the shear sliding under the external load.It is the most basic and important parameter of landslide stability analysis and design of the landslide control project.Because of the simple operations and clear principle,the direct shearing test,as an effective method,has been used to detect the shear strength of soils.Based on the basic principle of the direct shearing test,we have the test of the Huangtupo landslide slip zone soils in Three Gorges.By the test we got the parameter of shear stress and analyzed the variation of the shear strength under different moisture content and different particle sizes,this research could provide reference for subsequent numerical simulation of the slip zone soil direct shear test and the landslide stability analysis and evaluation.