洪湖长江干堤钢板桩防渗墙截渗效果初步评价

Preliminary evaluation on seepage prevention effect produced by steel sheet pile at Honghu Lake's Changjiang dyke reach

在阶段性监测成果的基础上 ,对洪湖长江干堤燕窝堤段钢板桩防渗墙渗控效果作出了初步评价。实际应用显示钢板桩的实施有利于减小渗流水头、降低堤身浸润线和出逸比降。对测压管和渗压计的观测成果进行了具体分析 ;对该堤段内地下水的分布规律有了初步认识。建议今后 (特别是汛期 )应在继续加强观测的基础上 ,再对钢板桩防渗墙的截渗效果作进一步分析评价。

On the basis of the interim monitoring results,a preliminary evaluation is done on seepage control effect of steel plate piles wall.The effect of practice showed that the seepage prevention wall is beneficial to reducing the seepage water head,decreasing the seepage line inside dike and escape gradient.A concrete analysis is carried out on piezometers and percolation gages measured data.The regularity of distribution of ground water level is primarily understood.It is suggested that,from now on,especially during flood period,the monitoring work should be continued and strengthened in order to further evaluate the seepage prevention effect of steel sheet piles wall.