基于加载与卸荷理论的某地下厂房围岩变形稳定分析对比研究

Comparative Study of Surrounding Rock Deformation and Stability of an Underground Powerhouse Based on Loading and Unloading Mechanical Theory

分别应用加载力学理论与卸荷力学理论的原理,采用二维有限元方法,分别对某地下厂房在自然、开挖、卸荷和加固4个工况下围岩的变形稳定进行了研究,并将计算值与监测值进行了比较.结果表明:两种不同方法计算值与监测值趋势基本相同,基于卸荷岩体力学理论的计算值更接近于实际情况,设计采用的锚索加固方案效果较好.

Based on the principles of loading and unloading mechanical theory,this paper studies the rock deformation and stability of an underground powerhouse in conditions of nature,excavation,unloading and reinforcement respectively by using the 2D finite element method,and compared it with the monitoring data.The results show that the computed values of two different methods and the monitoring data are basically the same;but the computed values based on unloading rock mechanical theory are closer to the actual situation;the effect of using anchor cable reinforcement scheme is better.