基于声发射的岩质工程边坡潜在滑动面及滑动面力学参数标定

项目名称： 基于声发射的岩质工程边坡潜在滑动面及滑动面力学参数标定

项目编号： No.51279024

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 水利工程

项目作者： 李连崇

作者单位： 大连理工大学

项目金额： 82万元

中文摘要： 基于"声发射率与岩体损伤具有一致性"的物理力学基础，突破声发射对区域岩体损伤定位的单一作用，有效利用声发射物理信息中关于破裂点的时空坐标及能量释放的量值、密度、源尺寸相关的数据，通过对室内岩样声发射及现场边坡体声发射物理信息的整合研究，建立起声发射物理信息与滑动面区域岩体力学参数变化的表征关系，实现对边坡滑动面力学参数的实时修正；以两个已安装有声发射监测系统的岩质工程边坡为背景模型，以实时监测得到的微破裂作为滑动面的初始损伤，以实时修正的滑动面力学参数为输入，通过对声发射活动性（破裂点出现及其能量释放的平静、迁移和加速规律）和三维地质力学模型精细数值表征（应力的集中、释放与转移模式）的相结合，实现对滑动面时空基准的标定；基于对离心机模型实验、声发射试验、数值分析及现场实际勘测结果的综合分析，揭示卸荷扰动对岩质工程边坡潜在滑动面时空基准影响的基本规律，界定所提出方法的适用条件和适用范围。

中文关键词： 裂隙岩体；岩质边坡；滑动面；声发射；力学参数

英文摘要： Based on knowledge that acoustic emission (AE) rate is corresponding to the damage of rock mass, it is pointed that AE not only could be used to detect the location of damage, but also could be used to determine the damage quality of rock mass. Based on the research of AE information including damage coordinate, magnitude, density and resource size of released energy, etc. obtained with experimental and in-situ test, a relationship between AE information and the variation of mechanical parameters of rock mass is proposed to calibrate the mechanical properties of the potential sliding surface. Then two rock slopes in construction are employed as the background models. The real-time monitoring micro-fractures are selected as the initial damage of the sliding surface and the calibrated mechanical properties are selected as the input parameters, the space-time location of the potential sliding surface is calibrated based on the evolution law of AE and stress field obtained from numerical results of three-dimensional geological model. Finally, based on the laboratory experiments on centrifugal loading of slopes, AE information, numerical analysis and the investigating results in-situ, the influences of unloading sequence, schedule and magnitude on the space-time location of the potential sliding surface and the stabi

英文关键词： fractured rockmass；rock slope；sliding surface；acoustic emission；mechanical properties