基于综合检测法的心墙坝渗漏研究

Study on Core Wall Dam Leakage Based on Comprehensive Detection Method

文章以三座店水库渗漏检测项目为依托,采用水位观测、流速测试、示踪试验及孔内成像等方法,对大坝主体进行了系统检测,结果表明心墙及心墙与防渗墙接触带存在多个严重渗漏部位,通过上游双排旋喷灌浆后,坝下水位下降3.4m,明流消失,处理效果显著。该检测方法在针对沥青混凝土心墙堆石坝渗漏部位确定的问题上,具有快速、准确的特点。

The paper is based on leakage detection projects of Sanzuodian Reservoir.The water level observation,flowing speed test,tracer test,in-hole imaging and other methods are adopted.The dam body is systematically tested.The results show that the core wall as well as the contact zone of the core wall and the diaphragm wall suffer from multiple serious leakages.The water level under the dam is dropped by 3.4m after upstream double-row rotary jet grouting.The free flow disappears with remarkable treatment effect.The detection method has fast and accurate characteristics in the determination of the leakage sites of asphalt concrete core wall rockfill dams.