新疆希尼尔水库大坝渗流安全评价

Seepage Safety Evaluation of Dam for Xinier Reservoir in Xinjiang

通过对新疆希尼尔水库在初期蓄水后的测压管监测资料分析,运用数值模拟手段,拟合监测水位,率定渗流参数,并模拟分析库水位、不同坝后排水沟水位及排水沟衬砌层不同渗透参数条件下的渗流状态。根据模拟结果分析评价认为,坝体坝基渗流场分布合理,坝后排水沟附近的渗流场分布和安全状态受库水位、排水沟水位和排水沟衬砌层渗透系数的显著影响。并对工程运行管理和必要的完善工作提出了建议。

The monitored data obtained by piezometers for the dam of Xinier Reservoir after initial impoundment is analyzed. Back analyses of the stratum permeability are performed with numerical method at the monitoring case. With the back analyses results, the seepage field is simulated at different cases. Safety status is evaluated according to the numerical simulation results. It is concluded that the seepage field in the dam and its foundation is reasonable, while the seepage field and the safety status of neighbor of the drainage ditch is influenced significantly by water level both in the reservoir and in the drainage ditch, and permeability of the filter for the drainage ditch as well. Some suggests are given for the management and necessary improvement of the project.