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[目的]研究化学示踪实验技术在水利工程渗漏检测中的应用。[方法]根据陕西省咸阳市三原西郊水库的现状,布置L1、L2、L3共3个断面,选用KI(碘化钾)作为化学示踪剂进行示踪剂跟踪检测试验研究。[结果]L1、L2、L3断面不存在明显渗漏现象;局部坝肩岩土抗渗性能较差。[结论]西郊水库渗漏原因为水库坝肩岩土抗渗性能不能满足防渗要求,水库投入运行后坝前水位上升,坝肩地下水位随之升高,渗透水压相应增大,增大了大坝下游岸坡水量。
[Objective] The research aimed to study the application of chemical tracing experiment technology in the leakage detection of hydraulic engineering. [Method] According to the status quo of the western suburb of Xianyang in Shaanxi Province, three sections of L1, L2 and L3 were arranged. KI (potassium iodide) was selected as the tracer for tracer testing. [Result] No obvious leakage occurred in L1, L2 and L3 sections; the impermeability of rock and soil in local dam abutments was poor. [Conclusion] The reason of seepage in Xijiao reservoir is that the seepage resistance of rock and soil in dam abutment can not meet the requirements of seepage prevention. The water level in front of the dam rises after the reservoir is put into operation. As a result, the groundwater level of dam abutment increases accordingly, Big dam downstream bank slope water.