码头引桥桩基对堤防的防渗影响及处理措施

Anti-seepage Influence and Treatment Measures of the Dike Approach Bridge Pile Foundation of Wharf

芜湖大盾构基地码头工程通过两座引桥及廊道将码头桩台与后方惠生联圩及陆域转运站相接,引桥桩基础穿透外滩地土体表面覆盖层。文章通过渗流计算分析工程实施后堤后表层土渗透稳定情况,采取堤防背水侧增设盖重及桩基周边2 m深度范围内粘土回填结合铺设复合土工膜的防渗处理措施,以保证堤防防洪安全。

The wharf of Large Shield Machine Base in Wuhu is connected to Huisheng Dike and the land transfer station through two approach bridges and corridors. The pile foundation of the approach bridge penetrates the overburden of soil on the bund. By calculating and analyzing the seepage stability of the surface soil behind the embankment after the implementation of the project,this paper takes the anti-seepage treatment measures of adding the cover weight on the back water side of the embankment and the clay backfilling in the 2 m depth around the pile foundation combined with the laying of composite geomembrane to ensure the safety of the embankment for flood control.