轻型井点降水工艺在工程中的应用

在地下水位较高的含水层中进行基坑开挖时，地下水会不断渗入基坑，较易产生流砂、管涌等破坏现象，甚至使边坡或坑壁失稳坍塌。在基坑开挖前，采用轻型井点降水工艺，将基坑内外水位降低，从而达到开挖基坑的目的，是常用且较为有效的施工方法。以恒大海上威尼斯排水涵闸施工工程涵闸基坑开挖为例，从方案设计到具体的施工过程叙述轻型井点降水。

Application of light well point dewatering technology in engineering

When a foundation pit is excavated in high water level,groundwater may cause drift sand and piping failure,even the slope instability or pit wall collapse due to the influent from seepage.Before the excavation of the foundation pit,the common effective way is to reduce the water level inside and outside the foundation pit adopting the light well point dewatering technology.Taking Venice Hengda sea drainage culvert construction engineering culvert excavation as an example,the design of the light well point precipitation scheme and the construction process of concrete is described.