摘要
为避免下伏承压水层的基坑在其开挖过程中产生突涌,常用做法多采用人工降水的方式来降低承压水水头;作为顶管工作竖井的沉井开挖面积小、深度大,当遇下伏承压水时,可预先在底板下方高程以旋喷桩相互搭接形成加固层,从而实现对承压水水头的隔断。文章通过理论分析和工程实例验证了该工法的可行性,不仅缩短沉井施工工期,而且大大减小了工程施工对周边环境的影响,为类似工程提供经验和依据。
Artificial precipitation is the most common method to avoid the inrushing phenomenon in the excavation of the foundation pit with confined water. As the working shaft for pipe - jacking, the excavation area of the sinking well is usually small and the the excavation is deep, and then, by the reinforcement layer formed by jet grouting pile lapped in each other which is constructed on the foot blade＇ s elevation in advance , the confined water could be cut off. This paper verify that theory by an engineering practice, and prove that time limit for a project could be cut short, and the influence to the cnviroment could be reduce to limit, this apprieation offers experience and the basis for similar projects.
出处
《福建建筑》
2012年第11期94-96,53,共4页
Fujian Architecture & Construction
关键词
旋喷桩
隔断层
承压水
基坑工程
沉井工程
Jet grouting pile
Isolated horizontal fault
Confined water
Foundation pit
Sinking well
