软土地基下11m高沉井施工技术

给排水工程中,对埋深较大而横截面尺寸相对不大的构筑物,采用大开槽施工将会造成占地面积大、土方量多等弊病,有时还受到施工场地限制。为此,常采用沉井法施工。沉井法适用于高地下水位、土质松软、流砂地段以及现场狭窄地段修建深埋构筑物。本文中沉井体积大,故采取先开挖再采用砂垫层很上铺承垫木扩大刃脚的施工技术。

In the water supply and drainage engineering project, for the large of buried depth cross-sectional size relatively modest structures, if we adopt large notching construction it will cause a lot of disadvantage, such as cover more area, make laege earth volume, it also will be astricted by the construction plant. For the above reasons, we shall adopt well-sinking construction mathod, this mathod can be act applied to high ground water, soil soft, flow sand area and on-site narrow area buried structures built. In this paper, so take caisson volume by again fjrst excavation pile sand pad is spread of wood expand blade mat feet construction technique.