软土地区地铁车站基坑支护结构变形研究  

Analysis of Deformation Characteristics of Foundation Pit Supporting Structure of Subway Station in Soft Soil Area

作　　者：秦玉婷 QIN Yu-ting(The 4th Engineering Co.,Ltd.of China Railway 18th Bureau Group,Tianjin 300350,China)

机构地区：[1]中铁十八局集团第四工程有限公司,天津300350

出　　处：《广东水利电力职业技术学院学报》2023年第2期36-39,共4页Journal of Guangdong Polytechnic of Water Resources and Electric Engineering

摘　　要：针对天津中北镇站-福姜路站地铁隧道项目的基坑开挖和施工,对其不同阶段测点的地下连续墙支护结构水平位移进行监测,分析淤泥软土对基坑支护结构及结构变形的影响,并对地基处理效果进行评价。结果表明:墙体变形最危险阶段为垫层浇筑阶段,垫层浇筑完成后,墙体水平位移基本达到峰值;底板浇筑完成后,墙体水平位移呈现稳定态势。通过对基坑底部进行加固,可减少软土对基坑支护变形的影响,使基坑支护最大横向位移深度减小,因此在基坑设计和施工时,应在垫层浇筑阶段进行必要的局部加固处理。Based on the subway tunnel project from Zhongbei station to Fujianglu station in Tianjin,the horizontal displacement of diaphragm wall support structure at different measuring points during excavation and construction of the foundation pit is monitored.This paper analyzes the influence of silt soft soil on foundation pit support structure,further studies the influence of soft soil on the deformation of foundation pit support structure and evaluates the effect of foundation treatment.The results show that the most dangerous stage of wall deformation is the stage of cushion pouring.The horizontal displacement of the wall reaches the peak after the completion of the cushion construction.When the floor is poured,the horizontal displacement of the wall is stable.By reinforcing the foundation pit bottom,the influence of soft soil on the deformation of foundation pit support can be effectively reduced,and the maximum lateral displacement of foundation pit support can be reduced to a certain extent.Therefore,in the design and construction of the foundation pit,the necessary local reinforcement treatment should be carried out in the stage of cushion pouring.

关 键 词：淤泥软土 基坑开挖 地下连续墙 数值模拟 

分 类 号：TU753[建筑科学—建筑技术科学]