泉域排泄带隧洞超前灌浆堵水施工技术措施  

Construction Technology Measures for Water Plugging by Advanced Grouting in Tunnel of Spring Discharge Zone

作　　者：刘斐 杨金娥 刘新花 舒承卓 何春林 LIU Fei;YANG Jin-e;LIU Xin-hua;SHU Cheng-zhuo;HE Chun-lin(POWERCHINA SINOHYDRO ENGINEERING BUREAU 14 CO.,LTD.,Kunming 650041,China)

机构地区：[1]中国水利水电第十四工程局有限公司,云南昆明650041

出　　处：《云南水力发电》2021年第6期30-34,共5页Yunnan Water Power

摘　　要：某工程地下洞室群位于天桥泉域排泄带内,地下洞室群洞顶高程均低于地下水位线,开挖揭露围岩破碎、裂隙较发育,以泥灰岩、灰岩为主,地下承压水较为丰富,开挖过程中出现多次大涌水,且支护后岩面渗水较为严重。对围岩岩性、构造及地下水发育情况进行分析、研究,开挖前先对掌子面进行超前灌浆堵水,能有效降低开挖时渗涌水的风险,降低抽排水压力,有效保护地下水资源。Underground caverns of a project are located in the discharge zone of Tianqiao spring area.The top elevation of underground caverns is lower than the groundwater level line,and excavation reveals that surrounding rocks are fractured and cracks are well developed.Surrounding rocks are mainly composed of limestone and limestone,and the underground confined water is rich.There are several large water gushes during excavation,and the seepage of rock surface after support is more serious.The lithology,structure and groundwater development of surrounding rocks are analyzed and studied.The pre-grouting and water plugging on the face of the palm before excavation can effectively reduce the risk of seepage during excavation,reduce the pressure of pumping and draining,and effectively protect groundwater resources.

关 键 词：泉域排泄带 承压水 地下水发育 超前灌浆 

分 类 号：TV543.3[水利工程—水利水电工程]