Hoek-Brown准则的改进及在大光包滑坡滑带碎裂岩体力学强度评价中的应用

发布时间：2018-03-30 02:35

本文选题：边坡工程　切入点：大光包滑坡　出处：《岩石力学与工程学报》2017年S1期

【摘要】：针对目前大光包滑坡滑带碎裂岩体力学强度参数缺乏研究这一问题,提出基于改进后的Hoek-Brown准则获取岩体力学强度参数的新方法。该方法首先通过岩体基本质量指标BQ、岩体结构等级SR、结构面表面等级SCR与结构面条件因子J_c分别对地质强度指标GSI进行量化取值;在此基础上,建立由岩体基本质量指标BQ估算扰动参数D的计算公式;并以现场调查和室内岩石力学试验为基础,将改进后的方法代入Hoek-Brown准则中,对大光包滑坡滑带碎裂岩体的力学强度参数进行评价。与E.Hoek建议法相比,改进后的方法获取的岩体力学参数偏小,更为接近前人研究中的建议值,证明该方法具有一定的合理性。
[Abstract]:In view of the lack of research on mechanical strength parameters of fractured rock mass in Daguangbao landslide slide zone at present, A new method for obtaining mechanical strength parameters of rock mass based on the improved Hoek-Brown criterion is proposed. Firstly, the basic quality index of rock mass, rock mass structure grade, surface level of structure plane SCR and the condition factor J\ +\%\% C of a structural plane are used to compare the ground, respectively. The quantitative value of GSI was calculated. On this basis, the calculation formula for estimating disturbance parameter D from the basic quality index of rock mass, Bq, is established, and the improved method is added to the Hoek-Brown criterion on the basis of field investigation and laboratory rock mechanics test. The mechanical strength parameters of fractured rock mass in Daguanbao landslide slide zone are evaluated. Compared with the E.Hoek 's suggested method, the improved method is smaller than that obtained by previous studies, and is closer to the suggested value in previous studies. It is proved that the method is reasonable.
【作者单位】：成都理工大学地质灾害防治与地质环境保护国家重点实验室;
【基金】：四川省青年科技创新研究团队专项计划项目(2017TD0018) 国家自然科学基金资助项目(41572291) 成都理工大学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)~~
【分类号】：P642.22;TU45

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