非连续结构面破坏过程的试验研究

项目名称： 非连续结构面破坏过程的试验研究

项目编号： No.50809036

项目类型： 青年科学基金项目

立项/批准年度： 2009

项目学科： 金属学与金属工艺

项目作者： 吴剑

作者单位： 三峡大学

项目金额： 20万元

中文摘要： 滑坡的稳定性往往受到滑带结构面的控制，利用剪切试验获得滑带抗剪力学参数，剪切试样缺乏代表性，不能反映实际条件下滑带结构面的非连续分布对宏观抗剪强度的影响机制。本项目从剪切力学参数的量测方式入手，通过建立一个由多维应力传感器组成的测量力平台，形成一种可以观察剪切面局部剪切力变化的试验手段，并在此基础上研究非连续分布结构面在剪切过程中，不同结构面区域间的应力分配关系，观察到在剪切过程中局部应力调整分配的现象。同时结合颗粒流模拟结果，分析了非连续分布结构面的剪切破坏过程的应力分配特征。

中文关键词： 滑带;非连续结构面;多维应力传感器;摩擦系数;颗粒流

英文摘要： The stability of landslide is usually decided by the shearing property of structural plane. The shearing parameters of the sliding-zone can be given by many types of experiments. But in most cases,the shearing strength and failure process in experiment may be much different from the real structure planes which are discontinuous structure.The project has developed a new kind of experiment that some multi-axis force strain sensors are assembled to a senor array.When the sliding-zone is sheared,the array measures the stress change on every measuring cell zone,and the stress adjustments during the shear process are observed in the test. Additionally,the failure process has been simulated by PFC(particle flow code).By Comparing the results of experiment and simulation,the mechanism of failure process of discontinuous structure plane can be explained.

英文关键词： sliding zone;discontinuous structure plane;multi-axis force strain sensors;friction coefficient;particle flow