大光包滑坡滑带碎裂岩体原位钻孔剪切试验研究

发布时间：2018-05-01 15:28

本文选题：大光包滑坡 + 碎裂岩体　；参考：《岩土工程学报》2017年09期

【摘要】：安县大光包滑坡是汶川地震触发的最大规模滑坡,滑坡南侧暴露长约1.8 km顺层滑带,其岩体高度碎裂化,引起广泛关注。为准确评价滑带碎裂岩体的强度参数,笔者在前人研究的基础上开展了细致的野外调查工作,采用法国Phicometre岩土两用原位钻孔剪切试验仪对大光包滑坡滑带碎裂岩体进行了原位剪切试验。将试验结果与Hoek Brown岩体强度准则估值和基于工程地质类比法的力学参数建议值进行了对比分析。基于以上研究,提出了大光包滑坡南侧顺层滑带碎裂岩体力学参数建议值:内聚力为245~480 k Pa,内摩擦角为25.0°~26.5°。
[Abstract]:The Daguangbao landslide in Anxian is the largest landslide triggered by Wenchuan earthquake. The south side of the landslide exposed about 1.8 km along the bedding slip zone, and its rock mass is highly fragmented, which has aroused widespread concern. In order to accurately evaluate the strength parameters of the fractured rock mass in the slip zone, the author carried out a detailed field investigation on the basis of previous studies. The in-situ shear test of the fractured rock mass in the slip zone of Daguangbao landslide was carried out by using the French Phicometre in situ borehole shear test instrument. The experimental results are compared with the Hoek Brown rock mass strength criterion and the suggested mechanical parameters based on the engineering geological analogy method. Based on the above research, the suggested values of mechanical parameters of fractured rock mass along the bedding slip zone south of Daguangbao landslide are put forward: cohesive force is 245 ~ 480kPa, internal friction angle is 25.0 掳~ 26.5 掳.
【作者单位】：地质灾害防治与地质环境保护国家重点实验室(成都理工大学);中国地质调查局成都地质调查中心;
【基金】：国家自然科学基金项目(41572291,41302287) 四川省青年科技创新研究团队专项计划项目(2017TD0018) 地质灾害防治与地质环境保护国家重点实验室团队项目(SKLGP2016Z001) 中国地质调查局项目(DD20160274)
【分类号】：P642.22;TU45

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