青海某抽水蓄能电站地下厂房洞室群围岩稳定性及支护效果研究  

Research on stability of surrounding rock and supporting effect of underground cavern group at a pumped storage power station in Qinghai

作　　者：丁宝晶 孙俊明 DING Baojing;SUN Junming(Huadong Engineering(Fujian)Co.,Ltd.)

机构地区：[1]华东勘测设计院(福建)有限公司,福建福州350003

出　　处：《大坝与安全》2024年第2期57-63,共7页Dam & Safety

摘　　要：青海某抽水蓄能电站地下厂房属典型深埋大型地下厂房洞室群,具有埋深大、跨度大、边墙高的特点,且受厂区内小断层发育等地质条件限制,其围岩稳定性问题复杂且重要。通过现场实测结合数值模拟计算的方法,对地下厂房洞室群围岩稳定性及支护效果进行了研究。研究表明,地下洞室以降低围岩受开挖扰动的程度和维持围压水平的方式进行支护,支护后围岩塑性区深度、变形均改善,支护结构受力情况较好,说明洞室间距合理,围岩整体稳定,具备成洞条件。本研究对类似地下洞室群的设计和施工具有参考意义。The underground powerhouse of a pumped storage power station in Qinghai is a typical deep-buried large cavern group,which has the characteristics of large burial depth,large span,high sidewalls,and is challenged by geological conditions such as the development of small faults in powerhouse area.The stability of its surrounding rock is complex and important.Research has shown that underground caverns are supported by reducing the degree of excavation disturbance to the surrounding rock and maintaining the level of confining pressure,the depth and deformation of plastic zone in surrounding rock are improved after support and the supporting structure is in good stress condition.This indicates that the spacing between caverns is reasonable,the surrounding rock is overall stable,and the condi-tions for cavern excavation are met.This study is informative for the design and construction of similar underground cavern group.

关 键 词：抽水蓄能电站 地下厂房洞室群 围岩稳定性 支护效果 

分 类 号：TV731[水利工程—水利水电工程]