摘要
基于流固耦合理论,以某水电站深埋长引水隧洞为工程实例,建立数值模型研究围岩本构参数(包括弹性模量、泊松比、摩擦角、凝聚力和渗透系数)对围岩稳定性的影响,开展了单因素敏感性分析,以位移来衡量各项参数对围岩稳定性影响的敏感程度,从而确定影响围岩稳定性的主次要因素。结果表明:渗透系数和弹性模量是影响围岩稳定性的主要因素,凝聚力、泊松比和摩擦角是影响围岩稳定性的次要因素,可为实际工程和相关数值研究提供借鉴。
In order to analysis the influence of the property of surrounding rock,including the elastic modulus, Poisson＇s ratio, friction angle, cohesion and permeability coefficient, on the stability of surrounding rock, the sensitivity analysis is carried out based on finite element software. Some tunnel i^s selected as numerical model, and the displacement is chose as the evaluation criteria for the stability of surrounding rock to determine primary and secondary factor. The results show that, permeability coefficient and the modulus of elasticity is the primary factor affecting the stability of surrounding rock ,while the cohesion, Poisson s ratio and friction angle play secondary part in affecting the it＇s stability.
出处
《建筑技术开发》
2013年第5期32-34,共3页
Building Technology Development
关键词
敏感性
流固耦合
位移
稳定性
围岩
sensitivity analysis
fluid-structure interaction
displacement
stability
surrounding rock
