古城水电站引水隧洞施工过程中围岩稳定性的数值模拟  

Numerical Simulation of the Stability of Surrounding Rock in the Construction Process of Tunnel Engineering at Gucheng Hydropower Station

作　　者：张学文[1,2] 杨世浩[1,2] 易光伟[1,2] 陆中玏[1,2] 

机构地区：[1]中国地质大学岩土钻掘与防护教育部工程研究中心,武汉430074 [2]中国地质大学工程学院,武汉430074

出　　处：《安全与环境工程》2013年第3期121-125,共5页Safety and Environmental Engineering

摘　　要：介绍了古城水电站引水隧洞采用台阶法施工的过程与方法,并以有限元分析软件ANSYS为平台,运用现代岩体力学模型对该引水隧洞施工过程中围岩与衬砌之间的作用进行了数值模拟,研究了围岩应力动态调整过程及其围岩的变形规律。结果表明:隧洞上断面开挖且初期支护后拱顶弯矩值和剪力值最大,此处最容易遭到破坏;通过对施工过程中监测数据的整理和分析,预测了隧洞断面的最终收敛量,其计算结果符合规范要求,表明初期支护的设计能够满足隧洞围岩稳定性的要求。This paper introduces the construction process and bench method of the diversion tunnel engineering,simulates the interaction between the surrounding rock and the lining by using the ANSYS software as the platform and the rock mechanical model, and analyzes the dynamic adjustment process of the surrounding rock stress and the deformation law of the surrounding rock. The results show the bending moment value and shearing force are the largest at the top of the tunnel, so the top of the tunnel is the most easily to be damaged. According to the monitoring data in the construction process, the paper predicts the ultimate convergence of the tunnel section, which meets the regulatory requirements, and the result indieates that the initial support design can meet the requirements of the stability of the surrounding rock.

关 键 词：隧道 施工过程 围岩稳定性 数值模拟 

分 类 号：X93[环境科学与工程—安全科学] TU43[建筑科学—岩土工程]