摘要
针对碟子沟风井场地边坡特征,在边坡典型位置的岩石与土层界面和软弱泥岩夹层处分别进行了原位剪切试验,获得了相应的抗剪强度指标。通过与滑带土相同工况下的室内试验强度指标对比,发现室内试验指标较原位剪切试验获得的内聚力和内摩擦角低,并分析了室内外试验结果差异的原因。试验研究表明,边坡岩土体的大型原位剪切试验对边坡稳定性分析和工程治理优化具有重要价值。
Based on the characteristics of the ventilating shaft slope in Diezigou, the in-situ shear tests were respectively carried out at the interface of the rock and soil layer and at the soft mudstone interlayer on the typical position of the slope, and the corresponding shear strength parameters were obtained. Compared with the cohesive force and the internal friction angle of the slide face soil in secondary shear and saturated state with laboratory shear tests and in-situ shear tests, the parameters of the landslide shear soil in secondary shear and saturated state from laboratory shear tests are lower than that from in-situ shear tests, and the reasons for the differences between the two kinds of tests are analyzed. It is shown that the in-situ shear tests are important to the slope stability analysis and the optimization of slope engineering treatment.
出处
《工程勘察》
CSCD
2012年第8期18-22,共5页
Geotechnical Investigation & Surveying
