隧洞支洞群施工及运行期围岩及衬砌结构应力变形数值分析  

Numerical analysis on structural stress-deformation of lining structure and surrounding rock of branch tunnel group during construction and operation

作　　者：赵冬莲[1] 王志刚[1] 

机构地区：[1]江西省水利规划设计院,江西南昌330029

出　　处：《水利水电技术》2010年第11期45-47,66,共4页Water Resources and Hydropower Engineering

摘　　要：采用弹塑性D-P模型对缅甸太平江水电站引水发电洞支洞群稳定性进行了分析,探讨了在开挖及运行工况下围岩稳定性、衬砌混凝土结构的应力变形分布规律以及不同开挖顺序对围岩应力变形影响。结果表明:在施工及运行工况下,围岩稳定,运行工况下现有衬砌结构能够满足要求,不同开挖方案对围岩应力变形影响不大。分析成果为该工程设计及施工提供参考。With elasto-plastic D-P model, the stability of the branch tunnel group of the water diversion tunnel for Dapein Hydro- power Project in Burma is analyzed herein; in which the stability of the surrounding rock, the stress-deformation distribution law of the lining concrete structure under the conditions of both the excavation and the operation as well as the impact from the various excavation sequences on the stress-deformation of the surrounding rock are discussed. The result shows that the surrounding rock is stable, the existed lining structure can meet the design requirement under the operation condition and then no large impacts are there from various excavation schemes on the tress-deformation of the surrounding rock. This analysis provides a reference for the design and construction of the project.

关 键 词：支洞群 隧洞围岩 隧洞衬砌 引水隧洞 结构应力 变形分析 太平江水电站 缅甸 

分 类 号：TV732[水利工程—水利水电工程]