虎盘水电站大坝建设期间 ,经过第 1次寒流后出现了 4条裂缝。经过分析 ,其形成的原因是多方面的 ,主要是环境温差、温控措施、约束条件、间歇施工、间断养护、保温条件、空库施工、水泥用量、骨料性质等。通过分析 ,制定了机械压力灌浆方案 ,实施后漏水现象逐渐消失 ,水库运行至今再未发现异常。 During the construction of the dam of the Hepan Hydropower Station, 4 cracks occurred after the first cold current. After analysis, its formation is due to many reasons, mainly environmental temperature, temperature control measures, constraints, intermittent construction, intermittent conservation, thermal insulation conditions, empty construction, cement consumption, aggregate properties. Through the analysis, a mechanical pressure grouting scheme has been formulated, the water leakage gradually disappears after implementation, and no abnormalities have been found in the operation of the reservoir so far.