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浙江省临海县桥头地下水库是大跃进的产物。位于双港区环溪下游,该地山林丛出,系卵石河床,库址以上集水面积42平方公里。建成后可引用地下迳流0.05～0.1秒立方米,灌溉农田500多亩,抗旱能力达60天以上,成为旱涝保收农田。库址在灌区上游的桥头地方,溪面宽30米,垂直于水流方向挖一道截水齿槽至不透水层,深度4～5米,最深6米(附图Ⅰ)。在齿槽内用50号水泥沙浆砌块石截水墙一道,厚度0.5米,两端嵌入岸内1.5米,砌好截水墙回填砂卵石至距溪床2.6米时,在靠右岸的一端,用干砌块
Linhai County, Zhejiang Province Qiaotou underground reservoir is the product of the Great Leap Forward. Located in the lower reaches of the Central River in Shuanggang District, the mountain forest is covered with pebble riverbed. The catchment area above the reservoir site covers an area of 42 square kilometers. After the completion of the project, it can refer to the underground flow of 0.05 to 0.1 seconds cubic meters, irrigation of 500 acres of farmland, drought resistance capacity of more than 60 days, a drought and salvo farmland. The reservoir site is at the bridgehead in the upper reaches of the irrigation area. The brook is 30 meters wide. Dig a truncated gully perpendicular to the water flow to the impermeable layer, with a depth of 4 to 5 meters and a depth of 6 meters (Figure I). In the alveolus with 50 cement mortar masonry stone cutoff wall together with a thickness of 0.5 meters, embedded in the shore at both ends of 1.5 meters, built cuttings wall backfill sand pebbles to 2.6 meters away from the river bed, at the end of the right bank , With dry block