地下水渗流对岸坡稳定影响试验研究  

Experimental research on the effect of groundwater seepage on bank slope′s stability

作　　者：严文群[1] 段祥宝[2] 张大伟[1,2] 

机构地区：[1]扬州大学水利科学与工程学院,江苏扬州225009 [2]南京水利科学研究院水工所,江苏南京210029

出　　处：《水运工程》2009年第4期22-26,37,共6页Port & Waterway Engineering

基　　金：江苏省自然科学基金(BK2005007)

摘　　要：从河道地下水稳定渗流的解析解、有限元解出发,分析了河道坡面上的渗透坡降的分布规律,得到了自由出渗坡面上土颗粒的临界渗透坡降计算公式。开展了地下水渗流对岸坡稳定影响的试验研究,分析了地下水渗流作用下的河道崩岸发生、发展机理和演变过程。从防止坡面发生渗透破坏和降低浸润线、减少渗流量两个角度,研究了防治崩岸的渗流控制措施,重点研究了土工织物和排水减压井在降低渗流破坏、增加边坡稳定性的效果。最后介绍了土工织物设计准则和排水减压井渗流计算方法。Based on the underground steady seepage′s analytical solution and FEM solution,we analyzed the seepage gradient′ s distribution law on slope surface,and obtained the calculation formula for the critical fall of soil particle on unconfined seepage surface.We also carried out an experimental research on the effect of groundwater seepage on bank slope′s stability and analyzed the river bank-failure′s mechanism of occurrence,development and evolution process under the action of underground seepage.We studied the seepage control measures for bank-failure′s prevention,especially the effect of geotextiles and drainage well on reducing the risk of seepage failure and increasing the stability of slope from prevention of seepage failure,reduction of saturation line and decrease of seepage discharge.The design criteria for geotextiles and calculation method for drainage well seepage are presented.

关 键 词：河道崩岸 渗流控制 砂槽模型试验 

分 类 号：U656.3[交通运输工程—港口、海岸及近海工程]