采用组合降水解决互层土基坑难于开挖的问题

Using the Combination Precipitation Technology to Solve the Problem of Foundation Excavation in Interbedded Strata

长江下游冲积平原区互层土质含水丰富,以比较典型的长江口的扬州施桥三线船闸为例说明采用PPR管轻型井点配合深井降水解决互层土质深基坑开挖问题,该工程集合了江苏省水工方面的知名专家的建议和指导意见,工程实施顺利,但对于深基坑降水如何保证周围建筑物和周围鱼塘地下水水位不能大幅度下降和安全补水问题未能进行系统探索。

The interbedded soil in Yangtze river alluvial plain area is rich in water, this paper takes the Yangzhou Shi Bridge third line shiplock in Yangtze estuary as an example, to explore that using the combination of PPR pile light well with deep-well drainage to solve the deep foundation excavation in interbedded strata, this project has gathers the suggestion and instructions of famous experts in Jiangsu water conservancy engineering industry, the project implemented smoothly, but it has not sysematically explored the problem that how to ensure the groundwater level not reduced greatly and the security hydrating in around architectures and fishpond, when carrying out the deep foundation pit dewatering.