清远抽水蓄能电站地应力场分析  

Research on Stress Field for Qingyuan Pumped-storage Power Station

作　　者：李永松[1,2] 陈建平[1] 尹健民[2] 汪洁[2] 许静[2] 

机构地区：[1]中国地质大学(武汉)工程学院,湖北武汉430074 [2]长江科学院水利部岩土力学与工程重点实验室,湖北武汉430010

出　　处：《水力发电》2011年第9期29-31,共3页Water Power

基　　金：国家重点基础研究发展计划"973"项目(2011CB710603);中央级公益性科研院所基金项目(CKSF2010018)

摘　　要：清远抽水蓄能电站岔管水头压力高,地下厂房规模巨大,为了保证地下洞室群围岩的稳定性,需要准确掌握初始地应力场的方向和大小。在对工程区地质构造进行分析的基础上,利用应力解除法和水压致裂法进行现场测试,并结合有限元计算预测了整个工程区的岩体应力分布。研究表明,地下厂房区地应力属于中等量级,最大水平应力方位角与厂房轴线的夹角较小,有利于洞室围岩的稳定。As the high branch pipe water pressure and huge underground powerhouse, the orientation and magnitude of initial stress field must be understood for ensuring the stability of surrounding rock of the underground caverns in Qingyuan Pumped-storage Power Station. After analyzing the geological structure of project region, the in-situ stress measurements are carried out by hydro-fracturing and overcoring methods, and the stress distribution in the whole project area is obtained through FEM regression analysis. The result shows that the magnitude of initial stress in underground powerhouse area belongs to medium level and the angle between the orientation of maximum principle stress and the axis of underground powerhouse is smaller. The stress field is conducive to the stability of surrounding rock.

关 键 词：初始地应力场 地质构造 回归分析 清远抽水蓄能电站 

分 类 号：TV743[水利工程—水利水电工程]