摘要
隧道施工会引起地层偏移,从而对临近构建筑物产生不利影响。以福州滨海快线首占站-莲花山站区间岱岭隧道为研究对象,利用有限元软件建立三维数值模型,分析了临近既有建筑物的EPB/TBM双模盾构施工对桩基的影响;进一步系统探讨了桩基刚度、隧道埋深、双隧道掘进次序的影响规律。研究表明:桩基刚度越大,隧道开挖引起的邻近桩基弯矩响应就越大;邻近桩基的弯矩响应随着隧道纵轴所处的深度的增加而减小;双隧道不同开挖次序对邻近建筑物桩基影响可忽略。
Tunnel construction will cause stratum deviation,which will have adverse effects on adjacent structures.In this paper,the Dailing Tunnel between Fuzhou Binhai Express Line's first station and Lianhuashan Station is taken as the research object,and a three-dimensional numerical model is established by using the finite element software to analyze the impact of the EPB/TBM dual-mode shield construction near the existing buildings on the pile foundation.The influence rules of pile foundation stiffness,tunnel burial depth and double tunnel driving sequence are further systematically discussed.The results show that the greater the stiffness of pile foundation,the greater the bending moment response of adjacent pile foundation caused by tunnel excavation;the bending moment response of adjacent pile foundation decreases with the increase of the depth of the longitudinal axis of the tunnel;the influence of different excavation sequence of double tunnels on the pile foundation of adjacent buildings can be ignored.
作者
练华洪
LIAN Huahong(China Railway 17^(th)Bureau Group Co.Ltd.,Taiyuan Shanxi 030006,China)
出处
《铁道建筑技术》
2023年第5期155-158,192,共5页
Railway Construction Technology
基金
中铁十七局集团有限公司科技研究开发计划项目(2020-30)。
关键词
EPB/TBM双模盾构
敏感建筑物
数值模拟
桩基响应
EPB/TBM dual-mode shield
sensitive buildings
numerical simulation
pile foundation response
