Abstract: Leakage increase by 50 L/s occurred at a face slab rockfill dam. By observation, underwater inspection and panel defects detection, the leakage passage was located. Treatment of panel defects was carried out and grouting in the by-pass seepage area was implemented, which decreased the leakage from 218 L/s to 134 L/s.

Key words: face slab rockfill dam, leakage, defect inspection, treatment

摘要： 某面板堆石坝渗流量出现50 L/s突增情况。通过加密观测、开展水下物探检查及水下面板缺陷普查，查找渗漏部位。通过治理低水位区域水下面板缺陷、集中治理高水位区域面板水平裂缝和对岸边绕坝渗流区域采取灌浆治理等措施，有效地将最大渗流量由治理前的218 L/s降低至134 L/s。

关键词: 面板堆石坝, 渗流量, 缺陷排查, 治理