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石砭峪水库位于秦岭北麓石砭峪峪口处,流域面积132平方公里,多年平均径流量9700万立方米,设计坝高85米,总库容2810万立方米,是一座以灌溉为主,结合发电、防洪的中型水库。水库大坝是定向爆破堆石坝,迎水坡采用沥青混凝土斜墙防渗。大坝工程于1973年5月10日成功的进行了定向爆破堆筑而成,经整修后蓄水,历年库水位均较低,水深在32～40米之间。1980年库内蓄水深56米时,坝后渗流量达0.85立方米/秒,水色由清变为淡黄色。为了查清漏水原因,即将水库放空,发现漏水部位有三处:(1)右岸高程700米至686米的岩体开裂4厘米,缝深3米,缝长38米,漏水量较大;(2)冲沟截水墙上部出现一条裂缝,宽2厘米,长65米,(3)坝面反弧段出现一些小裂缝。经分析,认为这些漏水的裂缝中,岸边岩石裂缝是漏水的主要途径,委托黄河水利委员会承担右岸岸坡处理设计,主要是进行岩面削
Shiyan valley reservoir is located in the northern foot of Qinling Mountain Shiyu Yu Meikou Department, the drainage area of 132 square kilometers, the average annual runoff of 97000000 cubic meters, design dam height 85 meters, the total storage capacity of 28100000 cubic meters, is a mainly irrigation, Combined with power generation, flood control of medium-sized reservoirs. Reservoir dam is a directional blasting rockfill dam, facing the water slope inclined wall with asphalt concrete seepage. The dam project was successfully constructed by directional blasting on May 10, 1973. After renovation, the water level in the dam was low and the water depth was between 32 and 40 meters. In 1980, when the reservoir water depth was 56 meters, the seepage flow after the dam reached 0.85 cubic meters / second, and the water color changed from clear to light yellow. In order to find out the cause of the leakage, the reservoir was to be emptied to find three leaking locations: (1) the rock mass on the right bank elevation of 700m to 686m was cracked 4cm, the seam depth was 3m and the seam length was 38m, ) There is a crack in the upper part of the gully cutoff wall, with a width of 2 cm and a length of 65 meters. (3) There are some small cracks in the anti-arc section of the dam surface. After analysis, it is considered that among these water leakage cracks, the rock cracks on the shore are the main way to leaking water. Commissioned by the Yellow River Conservancy Commission to undertake the design of the right bank slope treatment,