砂堤的荷载与稳定性分析

结合福州闽江橘园洲砂堤工程 ,详细分析了砂堤受到的各项荷载 ,研究了反向渗流力对砂堤稳定安全系数的影响 ,结果说明 ,反向渗流力对稳定所起的作用有时是相当可观的。本文通过大量计算 ,探讨了在几种情况下反向渗流力对稳定安全系数的影响 ,结果显示强度指标组合、坡比对反向渗流力所起作用的程度影响不明显 ,而上、下游水位差成为显著的影响因素。当水位差与堤身高度的比例到 70 %时 ,考虑反向渗流力将使安全系数提高 2 5 %以上

Loading and Stabilization Analysis of Sand Embankment

In combination with JuyuanZhou Sand Embankment Project in the Minjiang River of Fuzhou Provinve,the paper analyzes in datails various items of loading subject to sand embankment,studies on the influence of reverse leak force on the stabilization safety factor of the sand embankment.The result shows that the action of the reverse leak force at the stabilization is sometimes considerable.The paper approaches to the influence of reverse leak force on the stabilization safety factor in several conditions by a large of calculations.The result shows that the greed influence of the strength ind4ex combination and slope ratio on the reverse leak force is not so obvious,but the difference in the water level between the upper reaches and the down reaches becomes the notable influence factor.When the proportion of the water level difference and the height of the embankment shaft is 70%,it considers that the reverse leak force will increase the safety foactor to above 25%.