岩溶区深基坑开挖对邻近地铁车站的影响研究  

Study on the Influence of Deep Foundation Pit Excavation on Adjacent Subway Station in Karst Area

作　　者：钱建华 QIAN Jianhua(China Railway 20th Bureau Group 4th Engineering Co.Ltd.,Qingdao Shandong 266100,China)

机构地区：[1]中铁二十局集团第四工程有限公司,山东青岛266100

出　　处：《铁道建筑技术》2024年第3期154-157,187,共5页Railway Construction Technology

基　　金：中铁二十局集团有限公司科技研发项目(YF2104SD11C)。

摘　　要：依托徐州地铁4号线南三环换乘车站的岩溶区基坑施工项目,采用数值模拟与工程实践相结合的研究方法,深入探讨了岩溶区深基坑变形的控制问题以及基坑施工对邻近既有地铁车站稳定性的影响。通过建立三维数值模型,模拟了基坑开挖的全过程,并分析了溶洞处理前后基坑及邻近既有地铁车站的变形规律。研究结果表明,溶洞的有效处理能显著降低围护桩的水平位移和邻近地铁车站的竖向位移,进一步验证了溶洞处理的必要性,也为今后类似工程施工提供相应的参考价值。Based on the karst area foundation pit construction project of the south third ring transfer station of Xuzhou Metro Line 4,this paper adopts the research method of combining numerical simulation with engineering practice,and deeply discusses the control problem of deep foundation pit deformation in karst area and the influence of foundation pit construction on the stability of adjacent existing subway stations.By establishing a three-dimensional numerical model,the whole process of foundation pit excavation is simulated,and the deformation law of foundation pit and adjacent existing subway station before and after karst cave treatment is analyzed.The results show that the effective treatment of the karst cave can significantly reduce the horizontal displacement of the retaining pile and the vertical displacement of the adjacent subway station,which further verifies the necessity of the treatment of the karst cave and provides the corresponding reference value for the construction of similar projects in the future.

关 键 词：岩溶 地铁换乘车站 深基坑 数值模拟 

分 类 号：U231.3[交通运输工程—道路与铁道工程]