素墙对地铁基坑悬挂式降水效果及周边环境的影响分析  

Analysis of the Effect of Plain Wall on Suspended Precipitation of Subway Foundation Pit and Its Impact on the Surrounding Environment

作　　者：卢喜胜 LU Xisheng(Guangzhou Metro Design&Research Institute Co.,Ltd.,Guangzhou Guangdong 510000,China)

机构地区：[1]广州地铁设计研究院股份有限公司,广东广州510000

出　　处：《北方建筑》2024年第6期83-87,共5页Northern Architecture

摘　　要：基于某市地铁车站基坑采用悬挂式降水的工程背景,通过三维数值模拟,对比分析了设置素墙与未设置素墙两种方案下的水头及周边建筑物和地面沉降变化,研究了素墙对地铁车站基坑悬挂式降水效果及周边环境的影响。结果表明:悬挂式降水能有效将基坑内承压水位降至安全标高,是一种经济合理的抗突涌措施。通过增加素墙深度来加强止水帷幕效果,可有效增加承压水绕流路径,减少了降水对坑外承压水位的影响,从而减小了坑外地面沉降风险。Based on the engineering background of using suspended dewatering in the foundation pit of a subway station in a certain city,this study compared and analyzed the changes in water head,surrounding buildings,and ground settlement under two schemes of setting and not setting plain walls through three-dimensional numerical simulation.The study also investigated the impact of plain walls on the suspended dewatering effect of subway station foundation pits and the surrounding environment.The results indicate that suspended dewatering can effectively lower the pressurized water level in the foundation pit to a safe elevation,and is an economically reasonable measure to resist sudden surges.By increasing the depth of the plain wall to enhance the effect of the waterproof curtain,the flow path of the confined water can be effectively increased,reducing the impact of precipitation on the confined water level outside the pit and thus reducing the risk of ground settlement outside the pit.

关 键 词：悬挂式降水 基坑 沉降 地铁 

分 类 号：TU753.66[建筑科学—建筑技术科学]