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江西省上高县墨山水库三级堆石坝,控制流域面积8平方公里,水库正常高水位67.0米(假设高程),正常高水位以下库容120万立方米,最大坝高为20米,坝体上游面设置混凝土防渗体,堆石坝的剖面详见图1.本工程自1970年冬开始兴建,1972年建成受益.该工程在施工混凝土防渗体时,由于当时未设置伸缩缝,当混凝土防渗体浇筑到61.0米高程时,拆模后发现迎水面有4条从顶到底的垂直裂缝,缝宽约1毫米,见图2.为了保证大坝安全,使裂
Jiangxi Shanggao County Mianshan reservoir three rockfill dam, the control basin area of 8 square kilometers, the reservoir high water level of 67.0 meters (assuming elevation), the normal high water level storage capacity of 1.2 million cubic meters, the maximum dam height of 20 meters, the dam Concrete upstream of the body set the seepage control body, rockfill dam cross-section details shown in Figure 1. The project started construction in winter 1970, completed in 1972 to benefit from the project in the construction of concrete anti-seepage body, due to the absence of expansion joints, When pouring concrete impervious body to 61.0 m elevation, it is found that there are 4 vertical cracks from the top to the bottom of the welcoming surface after demolding and the joint width is about 1 mm, as shown in Figure 2. In order to ensure the safety of the dam,