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近几年来,陕北普遍推广了水坠坝,小型坝库多可当年完工,中型坝库因土方量大和封冻期长的影响以及冲填速度的限制,往往汛前难以达到防洪高程,形成险库,甚至垮坝失事。为了解决这一问题,利用陕北河道多沙的特点,采用汛前在主河槽修建石拱坝,汛期坝顶排洪、坝前拦浑淤淀,汛后在新淤土上冲填施工,续建土坝的方法,于
In recent years, northern Shaanxi generally popularized the water dam, small dam can be completed that year, the dam due to large earthwork and the impact of a long period of freezing and filling speed limit, it is often difficult to achieve before flood season flood control, the formation of insurance Treasury, or even crash collapse. In order to solve this problem, taking advantage of the characteristics of sandy river in northern Shaanxi, the stone arch dam was built in the main channel before the flood season, and the top of the dam was flooded in the flood season. Flood and sediment were stopped in front of the dam, Continued to build earth dam approach