地铁建筑密集区富水砂卵地层车站基坑降水及土体开挖施工技术  

Construction Technology of Foundation Pit Dewatering and Soil Excavation for Station Foundation Pit in Water-rich Sand Egg Stratum in Densely Built Metro Area

作　　者：薛永斌 Xue Yongbin(Powerchina Railway Construction Investment Group Co.,Ltd.,Beijing 100000,China)

机构地区：[1]中电建铁路建设投资集团有限公司,北京100000

出　　处：《科学技术创新》2022年第34期145-148,共4页Scientific and Technological Innovation

摘　　要：在建筑密集区富水砂卵地质条件下进行地铁车站施工,必须要采取基坑降水措施,一方面是营造良好的施工环境,有利于加快施工效率;另一方面则能避免基坑沉降问题,从而保护地铁车站的安全。以某地铁车站的基坑工程为例,首先介绍了几种常用的基坑降水方法,在综合对比后选择了管井降水,并从埋设钢护筒、砌筑泥浆池、钻孔、下填料等方面概述了基坑管井降水的施工流程。随后结合现场施工,总结了基坑土体开挖施工的具体方法,以及开挖作业中需要重点把控的技术要点。通过落实精细化施工管理,确保了本次地铁车站基坑工程的顺利完成。In the construction of subway stations under the geological conditions of water-rich sand eggs in densely built areas, it is necessary to take foundation pit dewatering measures. On the one hand, it is to create a good construction environment, which is conducive to speeding up the construction efficiency;on the other hand, it can avoid foundation pit settlement. problems, thereby protecting the safety of subway stations.Taking the foundation pit project of a subway station as an example, first introduces several common foundation pit dewatering methods. After a comprehensive comparison, the tube well dewatering is selected. The construction process of foundation pit tube well dewatering is summarized. Then combined with on-site construction, the specific methods of foundation pit soil excavation construction and the technical points that need to be controlled in the excavation operation are summarized. Through the implementation of refined construction management, the smooth completion of this subway station foundation pit project has been ensured.

关 键 词：基坑降水 土体开挖 施工环境 

分 类 号：U231.3[交通运输工程—道路与铁道工程]