摘要
[Objective] The research aimed to study the application of chemical tracing experiment technique in leakage detection of hydraulic engineering.[Method] According to the current situation of Sanyuan Western Suburb Reservoir in Xianyang City of Shaanxi Province,three sections （L1,L2 and L3） were set.KI was selected as the chemical tracer to carry out the tracing and detection research.[Result] There was no obvious leakage phenomenon in L1,L2 and L3 sections.The impermeability of rock in some dam abutments was bad.[Conclusion] The leakage reason of Western Suburb Reservoir was that the impermeability of rock in some dam abutments couldn’t satisfy seepage requirement.After the reservoir was put into operation,the water level in front of dam rose,and the ground water level of dam abutment also rose.The penetration water pressure correspondingly increased,and the water content of bank slope at the downstream of dam increased.
[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。
