海域高速公路围堰填筑及堰体防渗层施工技术研究

Technology Research on Cofferdam Filling and Impermeable Layer Construction of Expressway in Sea Area

为了解决海域公路施工受潮汐影响大的难题,以526国道岱山段改建工程海域路基施工为例,采用土石围堰隔离海水,在堰体上利用土工膜和闭气土(海积淤泥质黏土)进行组合防渗处理。结果表明,在近岸海域地段,土石围堰及其防渗层施工技术可行,防水效果好,能够有效降低成本,缩短工期,可供类似工程参考。

In order to solve the problem that the sea area highway construction is greatly affected by the tide,taking the sea area subgrade construction of the reconstruction project of National Road 526 Daishan section as an example,the soil-rock cofferdam is used to isolate the sea water,and the combined anti-seepage treatment is carried out by the geomembrane and the closed soil(Marine muddy clay)on the weir body.The results show that the construction technology of soil-rock cofferdam and its anti-seepage layer is feasible in the coastal area with good waterproof effect,which can effectively reduce the cost and shorten the construction period and can provide reference for similar projects.