粉质航道岸坡降雨入渗条件下板桩墙防渗分析

对于受连续降雨影响而产生渗流破坏的粉质航道岸坡,通常应采取设置反滤层、防渗墙等措施。针对苏北地区某航道护岸工程现场,提出采用预应力混凝土板桩墙作为防渗墙,并对防渗墙在不同位置时的应用效果进行了数值分析。结果表明,在护岸挡墙后一定距离设置一定入土深度的板桩防渗墙,可有效延长渗径,大幅降低降雨入渗导致的坡面位移,保证了岸坡稳定性。

Analysis on sheet-pile wall seepage-proofing of silty channel bank slope under rainfall infiltration condition

For the seepage failure of sility channel bank slope due to continuous rainfall,the measures of inverted filter and seepage-proofing wall are usually adopted.In view of a channel bank works in north area of Jiangsu,the prestressed concrete pile wall is proposed to be a seepage-proofing wall measure,and the application effect of seepage-proofing wall in different positions is analyzed numerically.The results show that when the pile seepage-proofing wall is set in some distance behind bank retaining wall and in some depth into soil,the seepage path is effectively extended and the slope displacement caused by rainfall infiltration is substantially reduced,so the bank stability is guaranteed.