庆元抽水蓄能电站工程地下厂房区域地应力测试与研究  

In-situ Stress Testing and Research in the Underground Powerhouse Area of Qingyuan Pumped Storage Power Station

作　　者：邵祎迪 于磊 牛明智 张富臣 SHAO Yidi;YU Lei;NIU Mingzhi;ZHANG Fuchen(China Water Resources Beifang Investigation,Design and Research Co.Ltd.,Tianjin,300222)

机构地区：[1]中水北方勘测设计研究有限责任公司,天津300222

出　　处：《水利水电工程设计》2025年第1期64-67,共4页Design of Water Resources & Hydroelectric Engineering

摘　　要：庆元抽水蓄能电站工程地应力测试采用了水压致裂法和室内Kaiser效应声发射测量方法。测试结果表明:二维水平主应力大小随埋深的增大而增加,在地下厂房埋深区域应力较集中,二维最大主应力在11.3~15.4 MPa;地下厂房区域三维最大主应力在10.2~12.7 MPa,方向在324°附近,倾角近水平,区域内以水平向构造应力为主导。声发射法采用重复加载的方式,抵消了试件内部因裂隙和孔隙引起的摩擦型AE对Kaiser效应点的影响,有效地获取试件取样处岩体的地应力值,提高了声发射试验的测试精度。The in-situ stress testing for the Qingyuan Pumped Storage Power Station utilizes the hydraulic fracturing method and the indoor Kaiser effect acoustic emission measurement method.The test results indicate that the magnitude of the two-dimensional horizontal principal stress increases with depth.The stress is concentrated in the underground powerhouse embedded area,with the two-dimensional maximum principal stress ranging from 11.3 to 15.4 MPa.In the underground powerhouse area,the three-dimensional maximum principal stress ranges from 10.2 to 12.7 MPa,with a direction near 324°and an inclination nearly horizontal.The area is predominantly influenced by horizontal tectonic stress.The acoustic emission method employs repeated loading to offset the influence of friction-type AE caused by internal cracks and pores in the specimen on the Kaiser effect point.This effectively obtains the in-situ stress values of the rock mass at the sampling location,improving the accuracy of the acoustic emission test.

关 键 词：抽水蓄能电站 水压致裂法 KAISER效应 地应力 

分 类 号：TV743[水利工程—水利水电工程]