粘质粉土地层基坑的降水实践  

Dewatering Practice of Foundation Pits in Clayey Silt Stratum

作　　者：王辉 

机构地区：[1]上海市市政公路工程质量安全监督站,上海200023

出　　处：《城市道桥与防洪》2009年第8期138-140,共3页Urban Roads Bridges & Flood Control

摘　　要：该文介绍一个基坑工程的降水实例,分析了上海地区浅层的粘质粉土层潜水对基坑施工的影响。工程实践证明,尽管基坑挖深较浅,在地层情况变化较大时,采用轻型井点是存在局限性的,会造成基坑的降水达不到开挖要求,这是在粘质粉土地层基坑降水设计施工时应该注意的。该文给出了粘质粉土地层基坑降水异常时的系统处理方法,可作为同类基坑工程施工的借鉴。The article introduces a dewatering example of foundation pit project, and analyzes the influence of the subsurface water in the shallow clayey silt stratum of Shanghai area on the construction of foundation pit. The engineering practical proves that the use of light well point is limited when the stratigraphic conditions greatly changes though the pit is excavated more shallowly so as to make the dewatering of the pit not reach the excavation requirement. It should be attentive when the design and construction of the pit dewatering in the clayed silt stratum. The article gives the system dealing method when the pit dewatering in the clayed silt stratum is out of the way, which can be referred for the similar projects.

关 键 词：基坑 粘质粉土 降水 井点 上海 

分 类 号：TU463[建筑科学—结构工程]