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山西平遥县尹回水库原是一座小(一)型水库,坝体为均质土坝,坝高12.5米。1977年8月水库泄洪时,因消力池破坏,导致坝体决口。坝体修复时,将水库扩建为中型水库,坝高为20.4米,总库容为2630万米~3。水库蓄水后,当坝前水深11.98米时,原决口坝段下游坡脚出现较大管涌,渗漏量为13升/秒,随着水位升高,渗漏量逐渐增加,且坝体浸润线比设计的高。分析其原因是坝基地质条件差,
Yinhui Reservoir in Pingyao County, Shanxi Province was originally a small (a) type reservoir, with a homogeneous dam and a dam height of 12.5m. In August 1977, when the reservoir was discharging water, the dam was ruined due to the destructive pool. When the dam is repaired, the reservoir will be expanded into a medium-sized reservoir with a dam height of 20.4 meters and a total capacity of 26.3 million meters ~ 3. After the reservoir was filled with water, when the water depth at the dam was 11.98 meters, a large pipe burst occurred at the foot of the downstream section of the dam. The seepage amount was 13 liters / second. As the water level increased, the amount of seepage gradually increased and the dam infiltrated The line is taller than the design. Analysis of the reason is that the dam foundation geological conditions are poor,