一、堤缘情况与现存问题河南省两岸大堤从这次察勘来看,存在问题是很大的。一方面堤身古老,内部情况复杂,下部隐患尚未消除;另方面堤身系建筑在黄河下游的冲积平原上,基础多沙,渗水、漏水堤段很多,加以临背悬殊大,残缺严重,一遇洪水偎堤,即会产生管涌现象,甚至发生漏洞或溃决。现在来看,堤防上最大最严重的问题是隠患和弱点的问题。从历史的 First, the embankment situation and the existing problems From both sides of the embankment of Henan Province from the survey, the problems are great. On the one hand the ancient levee, the internal situation is complex, the hidden dangers of the lower part has not yet been eliminated; the other is the dike system construction in the alluvial plain in the lower reaches of the Yellow River, the foundation of sand, water seepage, leaking many embankments, Encountering flood embankment, which will have a phenomenon of piping, or even loopholes or crashes. Now, the biggest and most serious problem on the embankment is the problem of suffering and weaknesses. From history