摘要
为查明驼马店隧道DK48+918突涌水岩溶发育情况及岩溶水系统结构特征,首先对隧道涌水形式、涌水量、压力大小等涌水特征进行综合分析,得出岩溶隧道突涌水与隧址区岩溶发育情况、岩溶水系统结构特征密切相关。其次系统总结岩溶突涌水系统辨识的方法和技术,最后采用水文地质调查、物探、钻探、地下水示踪试验及高分辨率水文监测技术等对DK48+918突涌水进行系统辨识。研究表明:隧道施工揭露了管道流顶盖,因强降雨、原管路淤塞引发突涌水,涌水主要来源于隧道东北侧溶丘洼地及漏斗地表汇水,涌水随降雨量动态变化大,计算最大涌水量为5万m^3/d,瞬时最大涌水量可达1万m^3/h。
This paper aims to find out the karst development of gushing water and the structural characteristics of karst water system in Tuo Madian Tunnel of the mileage DK48+918. Firstly, the characteristics of tunnel gushing water, such as the form, quantity and pressure of gushing water, are comprehensively analyzed. It is concluded that the karst gushing water in Tuo Madian Tunnel is closely related to the karst development in the tunnel site and the structural characteristics of karst water system. Secondly, the identification methods and techniques of karst gushing water system are systematically summarized. Finally, the characteristics of gushing water in section DK48+918 are identified by hydrogeological survey, geophysical prospecting, drilling, groundwater tracer test and hydrological monitoring technology of high resolution. The study shows that the top cover of the pipeline flow is exposed in tunnel construction. The gushing water is caused by heavy rainfall and silting of the original pipeline, and the gushing water mainly comes from the surface catchment of karst hills and depressions and funnels on the northeastern side of the tunnel. The dynamic change of gushing water with rainfall is large and the calculated maximum volume of gushing water is 50 000 m^3/d, and the instantaneous maximum inrush water volume is up to 10 000 m^3/h.
作者
罗文艺
LUO Wenyi(China Railway First Survey and Design Institute Group Co.,Ltd.,Xian,710043,China;Shaanxi Railway and Underground Traffic Engineering Key Laboratory(FSDI),Xian 710043,China)
出处
《铁道标准设计》
北大核心
2020年第6期133-138,共6页
Railway Standard Design
关键词
铁路隧道
岩溶隧道
突涌水类型
系统辨识
结构特征
水动力分带
railway tunnel
karst tunnel
type of sudden water inflow
system identification
structural feature
hydrodynamic zoning
