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一、基本情况新沂河北堤口头至龙埝间约16公里,堤基较浅的复盖层下有十几米厚的中、粗砂层,每逢新沂河行洪时,堤内离堤脚数十米甚至数百米范围内普遍发生地面窨潮、渗水及砂沸现象,局部地段并有管涌冒泉,严重地威胁着大堤的安全。1957年新沂河行洪3700秒立方米时,该段堤内沿线数百米范围内大部庄稼由于渗水受渍失收,当时因洪峰历时较短,
First, the basic situation Xinyi Beidi vermicelli to Longtan about 16 kilometers between the embankment shallow cover over a dozen meters thick, coarse sand layer, every Xinyi River flood, embankment from the foot of the embankment Tens or tens of meters or even hundreds of meters of ground surface tide generally occur, seepage and sand boiling phenomenon, and some local pipe run counterfeit springs, a serious threat to the safety of the dike. When the Xinyi River flooded for 3,700 seconds in 1957, most of the crops within a few hundred meters along the embankment were lost due to water seepage. Due to the relatively short peak flood time,