基于实测变形的雾江滑坡体弹-黏塑性参数反馈

发布时间：2018-07-08 11:35

本文选题：滑坡体 + 滑带　；参考：《岩土力学》2017年06期

【摘要】：雾江滑坡位于涔天河水库扩建工程库首右岸的雾江峡谷进口段,下游边坡距大坝仅300余米,是一个典型的古滑坡,滑坡总体积为1 327×10~4 m~3,雾江滑坡稳定与否严重影响到大坝及泄水建筑物的运行与安全。首先分析了滑坡体实测位移;接着针对滑坡体处于缓慢蠕滑过程中,采用极限分析法,假定安全系数为1.0,反演了滑坡体的强度参数;然后选取滑坡体内部钻孔观测位移年蠕滑率,假定滑坡体满足莫尔-库仑屈服准则,由Perzyna假设计算黏塑性应变率,结合滑坡体典型剖面有限元模型,采用弹-黏塑性有限元计算程序进行滑坡体分析,将正交设计法和优化算法相结合,反演获得滑坡体和滑带的弹性模量和黏滞系数,为进行该滑坡堆积体的稳定变形分析和监控提供了依据,也可为同类工程参考。
[Abstract]:The fogjiang landslide is located in the inlet section of the fog River Canyon on the first right bank of the cen Tianhe reservoir extension project. The downstream slope is only 300 meters away from the dam. It is a typical ancient landslide with a total volume of 1327 x 10~4 m~3. The stability of the landslide has seriously affected the transportation and safety of the dam and the discharge structure. Then, in the process of slow creep of the landslide body, the limit analysis method is adopted, and the safety factor is assumed to be 1, the strength parameters of the landslide body are retrieved, and then the annual creep rate of the displacement is observed by drilling in the body of the landslide. It is assumed that the landslide body satisfies the Mohr Coulomb yield criterion, the viscoplastic strain rate is calculated by the Perzyna hypothesis, and the typical landslide body is combined with the typical landslide body. The finite element model of the section is used to analyze the landslide body by the elastic viscoplastic finite element calculation program. The elastic modulus and viscosity coefficient of the landslide body and the sliding zone are obtained by combining the orthogonal design method with the optimization algorithm, which provides the basis for the analysis and monitoring of the stable deformation of the landslide accumulation body, and can also be used as a reference for the same kind of engineering.
【作者单位】：三峡大学水利与环境学院;中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室;湖南涔天河工程建设投资有限责任公司;
【基金】：国家自然科学基金资助项目(No.51209124) 国家重点基础研究发展计划(973)项目(No.2011CB013505)~~
【分类号】：P642.22

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