摘要
开挖利用和开发建设等人类工程活动,破坏了岩体原有的天然应力平衡状态,而结构面的存在进一步恶化了地质环境安全,所以,为了有效防治崩塌、滑坡等地质灾害的发生,有必要对扰动作用下结构面的应力状态和强度特性进行分析研究。将岩体所受扰动作用以应力形式量化,分析了扰动应力波在结构面中的传递过程并对其衰减特征进行了量化,同时建立了扰动作用下结构面应力分析模型。基于此,结合库仑-纳维叶准则,给出了扰动作用下结构面的强度分析准则,同时,实现了扰动作用对结构面强度的劣化效应分析并使用折减系数进行定量描述。该过程的实现为有效防治工程活动引起的地质灾害提供理论依据,给出了一种分析扰动作用下地质灾害诱发机制的新思路。
The original natural stress balance of the rock structure is destroyed by human engineering activities of excavation and construction, and the geological environment safety is deteriorated further by the existence of weak structural plane. Therefore, it is necessary to analyze the stress state and strength characteristics of rock structure under engineering disturbance to effectively control the occurrence of geological disasters such as collapse and landslide. In this paper, the disturbance process of the rock structure was quantified in the form of stress. The propagation of the stress wave in weak structure plane was analyzed and its attenuation characteristics were quantified. Also, the quantification expression of stress was given and the stress analysis model was established. Based on this, the criterion of strength analysis of rock structure under stress disturbance was deduced by the Coulomb-Navier criterion. At the same time, the damage effect of stress disturbance on the strength of rock structure was realized and the reduction coefficient was used to quantitatively describe it. The realization of this process provides a theoretical basis for effective prevention and control of geological disasters caused by engineering disturbance, and a new idea to analyze the induced mechanism of geological disasters under engineering disturbance is given.
作者
王斐笠
王述红
修占国
WANG Fei-li;WANG Shu-hong;XIU Zhan-guo(School of Resource and Civil Engineering,Northeastern University,Shenyang,Liaoning 110819,China)
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2018年第8期2844-2850,2857,共8页
Rock and Soil Mechanics
基金
国家自然科学基金资助项目(No.51474050
No.U1602232)
辽宁省高等学校优秀人才支持计划项目(No.LN2014006)
辽宁省自然科学基金项目(No.20170540304
No.20170520341)
硅酸盐建筑材料国家重点实验室(武汉理工大学)开放基金资助项目(No.SYSJJ2017-08)~~
关键词
应力波扰动
结构面
应力量化
强度表征
disturbance of stress wave
rock structural plane
stress quantification
strength characterization
