厦门文兴隧道近接东山水库段地下水连通试验研究

厦门文兴隧道近接东山水库段,工程地质与水文地质条件复杂,较发育的构造裂隙,以及断层破碎带的存在,容易形成集中渗漏水通道。该文介绍了其地下水连通试验研究。为了全面查明该区隧道内渗漏水与水库水的水力联系,分析了多种地下水连通试验方法,并形成了城市隧道地下水连通综合试验方法流程图,现场主要进行了氢氧稳定同位素、水化学和水样系统聚类三种天然示踪地下水连通试验。连通试验成功查明了隧道内渗漏水与水库水无水力联系,隧道内渗漏水来源于大气降水,即文兴隧道与东山水库不连通。该连通试验的成功实施,指导了文兴隧道近接东山水库段施工,保证了文兴隧道顺利贯通,可供类似工程借鉴参考。

Experimental Study on Groundwater Connection in Section of Wenxin Tunnel Closely with Dongshan Reservoir in Xiamen

The engineering geological and hydrogeological conditions are complex in the section of Wenxin Tunnel closely with Dongshan Reservoir because of the existing more developed structural crack and broken fault zone easily to form the concentrated water leakage passage.The article introduces the other groundwater connection experimental studies.In order to fully find out the hydraulic relationship between the leaking water within the tunnel of this area and the water of the reservoir,the article analyzes many groundwater connection experimental methods,and forms the flow chart of comprehensive experimental method for the urban tunnel groundwater connection.The filed experiments are three natural tracing groundwater connection tests of hydrogen oxygen stable isotope,water chemistry and water sample clustering.The connection experiment successfully finds out that the leaking water within the tunnel is not hydraulically related with the water of reservoir,the leaking water within the tunnel sources from the atmospheric water,and Wenxin Tunnel is not connected with Dongshan Reservoir.The successful implementation of this connection test can guide the construction of the section of Wenxin Tunnel closely with Dongshan Reservoir,and guarantee the smooth traffic of Wenxin Tunnel,which can be referred for the similar projects.