新建堤坝上构建永久防渗体系的施工技术

Construction techniques of building permanent anti-seepage system on new dam

如何在新建堤坝上构建永久防渗体系从而形成稳定内海水域已成为重点关注的问题。以某工程人工岛为例,重点介绍在新建堤坝上采用钢筋混凝土防渗墙咬合深层水泥搅拌桩、钢筋混凝土防渗墙咬合钢板桩两种施工工艺,从防渗效果和经济效益方面进行对比,优选合适的施工方案。结果表明:(1)在新建堤坝上通过钢筋混凝土防渗墙垂直咬合永久钢板桩的施工方案是经济可行的。(2)在降低施工难度的基础上增强了海堤的防渗体系,效果明显。

How to build a permanent anti-seepage system on a new dam to ensure stable inland waters has become a key concern.Taking an artificial island in a project as an example,this paper focuses on two construction techniques including reinforced concrete anti-seepage walls engaging with deep cement mixing piles and reinforced concrete anti-seepage walls engaging with steel sheet piles on a new dam,and it compares the two techniques in terms of the anti-seepage effect and economic benefits to select the appropriate construction scheme.The results show that:(1)The construction scheme of using reinforced concrete anti-seepage walls to vertically engage permanent steel sheet piles on the new dam is economically feasible.(2)On the basis of reducing the construction difficulty,the anti-seepage system of the dam is strengthened,and the effect is obvious.