贵广铁路岩溶隧道水害原因分析及整治措施

Cause Analysis and Remediation Measures for Water Damage of Karst Tunnels on Guiyang-Guangzhou High-speed Railway

贵广铁路是西南地区通达华南沿海地区的重要区际铁路通道,铁路沿线受西南及华南地区气候湿润、地下水活动频繁等因素影响,岩溶极其发育,穿越可溶岩地段长达219 km,其中贵阳至贺州段共有岩溶隧道75座,隧道长度88.5 km。文章结合贵广铁路岩溶隧道水害实例进行分析,得出岩溶发育、地下水与地表水水力联系紧密和隧道防排水系统失效的水害原因,针对临时钻孔泄水降压、衬砌渗漏水、隧道道床隆起和设置监控量测点等方面提出整治措施,为今后类似工程提供借鉴。

Guiyang-Guangzhou High-speed Railway is an important inter-regional railway aisle connecting the southwest areas to the southeast coastal areas in China.Affected by the humid climate and frequent groundwater activities in the southwest and south China,the karst is extremely developed along the railway,and the length of the soluble rock section is 219 km.Among them,there are 75 karst tunnels in the Guiyang-Hezhou section,and the tunnel length is 88.5 km.Based on the actual situation,this paper analyzes the water damage in karst tunnels of Guiyang-Guangzhou Railway,the cause of karst development,the close connection between groundwater and surface water and the failure of tunnel drainage system is concluded,in view of the temporary borehole drainage pressure drop,lining leakage,tunnel bed uplift and setting monitoring measurement points,the remedial measures are proposed to provide reference for similar engineering design in the future.