摘要
在具有厚潜水含水层地质环境下进行地铁建设施工时,容易受地下水影响,特别是在基坑开挖过程中容易引起地表沉降、地下连续墙和基坑坍塌等一系列风险,合理的降水设计和施工质量是项目安全的保障。基于此,以郑州市地铁8号线龙王庙车站基坑降水施工为依托,在简要介绍该工程的主要施工环境和水文地质条件的基础上,详细分析在强透水地质环境下的降水施工难点和相应解决措施,并通过对基坑降水效果进行计算和数值模拟,监测降水井降水效果以及周围地表沉降。结果表明:运用三轴搅拌桩止水帷幕配合井点降水能够达到预期降止水效果,确保地铁基坑稳定性,保证地铁工程的顺利进行。
For the subway construction in the geological environment with a thick phreaticaquifer,groundwater affects the process,especially in the foundation pit excavation process,risks such as surface settlement,collapse of underground continuous walls and foundation pits,etc.,so reasonable design of water-reducing and construction quality can guarantee the safety of a project.Thus,based on the water-reducing construction of the foundation pit in Longwangmiao Station on metro line 8 in Zhengzhou,this paper briefly introduced the general construction environment and the hydrogeological conditions,seriously analyzed the difficulties in water reducing construction and corresponding solutions in the highly permeable geological environment,and through the calculation and numerical simulation of the water reducing effect of the foundation pit,monitored the water-reducing effect of the water-reducing well and the surrounding surface subsidence.The results showed that using thewater stopping curtain of the three-axis mixing pile,along with the well point,can achieve the expected effect of water stopping,ensure the stability of the subway foundation pit,and guarantee the smooth progress of the subway project.
出处
《重庆建筑》
2022年第6期37-39,43,共4页
Chongqing Architecture
关键词
地铁车站
潜水含水层
基坑
降水施工技术
subway station
phreatic aquifer
foundation pit
construction technology of water reducing and stopping
