剑河南东水电站大坝渗漏原因分析

Analysis on the Seepage Causes of the Dam for the Jianhe River Nandong Hydropower Station

南东水电站大坝是一座重力坝工程,坝高34.7 m。大坝建成试蓄水期间,出现基础渗漏、坝体漏水等问题。为此,对南东水电站大坝渗漏原因做了初步论证研究。经现场观察分析认为,帷幕灌浆质量没有达到设计要求、施工质量差等是大坝渗漏的主要原因。应力复核计算结果表明,电站重力坝设计不满足现行规范要求,需采取进一步的安全加固工程措施。

Nandong Hydropower Station Dam is a gravity dam with the height of 34. 7 m. The problems such as the foundation leakage and dam water leakage are existence during the dam water storage stage. Therefore,the preliminary analysis on the seepage causes of Nandong Hydropower Station Dam has been carried out. Through the field observation and analysis,deeming that the quality of the curtain grouting does not meet the design requirements and poor construction is the main reason to cause the dam leakage. The Stress check calculation results show that the Nandong Hydropower station dam design does not meet the requirements of the code,which need to take further engineering measures to strengthen the dam safety.