隧洞涌水来源环境同位素及水化学判别研究  

Study on the sources of tunnel gushing water by using environmental isotope and hydrochemical analysis

作　　者：张令[1] 张一[2] 党雪梅[2] 董海洲[1,3] 罗日洪[1] 

机构地区：[1]河海大学土木与交通学院,南京210098 [2]黄河勘测规划设计有限公司,郑州450003 [3]河海大学地球科学与工程学院,南京210098

出　　处：《工程勘察》2013年第5期39-42,47,共5页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金项目(50809024);江苏省自然科学基金项目(BK2009343);中央高校基本科研业务费专项资金资助(2009B12214)

摘　　要：地下水化学成分、电导率以及环境同位素含量δD、δ18 O是调查其运动状况的天然示踪剂。综合利用三者所包含的地下水渗流信息,依据在工程应用中各自不同的基本原理,对隧洞涌水来源进行判别。多种方法的综合分析克服了单一示踪方法的局限性,其结论可以相互验证,更为准确、可靠。以某隧洞涌水为例进行了工程探测分析,该隧洞涌水量较大,由地质构造分布存在附近河水经断层补给的可能性。通过取样测定及上述综合分析,确定隧洞涌水主要来自于当地降水补给,河水补给的可能性较小。探测结论为下一步工程设计、施工和防渗提供了依据。The chemical composition, the electric conductivity and the contents of environmental isotope δD, δ^18O of groundwater are the natural tracers for investigating its movement. Based on groundwater seepage information contained in the three tracers and their basic principles in practical application, the supply sources of the tunnel gushing water can be distinguished. Results from this multi-tracer method can be testified by each other and eventually be much more precise and reliable, which overcome the limitation of single-tracer method. Taking the water inflow of certain tunnel as the practical example, the engineering exploration is analyzed. The water inflow in the tunnel is large, and it is possible that the gushing water comes from a nearby river through the faults according to geological conditions. Through the testing results from the water samples collected and the above composition analysis, the supply source of the gushing water in the tunnel is mainly from the local precipitation, which is lower possible from the nearby river. The exploration results provide the scientific basis for the future engineer design, construction and seepage control.

关 键 词：水化学 电导 环境同位素 涌水 

分 类 号：P629[天文地球—地质矿产勘探]