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湖南省宁乡县华光水库是1970年10月建成的小(一)型水库,均质土坝高20米,正常蓄水215万立方米,圬工输水涵洞长80米,断面为0.5米×0.8米门洞型。由于涵洞及大坝的质量不高,1971年水库第一次蓄水时,涵洞就漏水。1975年发现涵洞进口段顶部长约14米的坝坡有深达0.5米的塌坑。当年冬天明挖处理,只见涵洞周围已被渗水淘空,并有鱼虾活动。当即采取水泥砂浆补缝,粘土回填夯实,但渗漏仍未能解决。1984年4月26日,当库水位为10.27米时,在洞内测得漏水量
Huaguang Reservoir in Ningxiang County, Hunan Province, was a small (a) type reservoir completed in October 1970. The homogeneous earth dam is 20 meters high with a normal water storage capacity of 2.15 million cubic meters and a culvert tunnel of 80 meters in length with a cross section of 0.5 M × 0.8 meters door type. Due to the low quality of culverts and dams, culverts leaked when the reservoir first impounded in 1971. In 1975, it was found that the dam slope at the top of the culvert entrance section, which is about 14 meters in length, had a collapse pit of 0.5 m deep. Ming ditching treatment in winter that year, I saw seepage around the culvert has Amoy, and fish and shrimp activities. Immediately to cement mortar patchwork, clay backfill compaction, but the leakage still can not be resolved. April 26, 1984, when the reservoir water level is 10.27 meters, measured in the hole leakage