夹桩基条件下双线隧道盾构施工沉降特性研究  

Study on settlement characteristics of shield construction with pile foundation between double-line tunnels

作　　者：王武超 范磊 倪嵩波 魏继红[2] 乐慧琳 WANG Wuchao;FAN Lei;NI Songbo;WEI Jihong;LE Huilin(China Construction Industrial&Energy Engineering Group Co.,Ltd.,Nanjing 210023,China;School of Earth Science and Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]中建安装集团有限公司,江苏南京210023 [2]河海大学地球科学与工程学院,江苏南京210098

出　　处：《甘肃科学学报》2024年第5期1-8,共8页Journal of Gansu Sciences

基　　金：国家自然科学基金青年基金资助项目(42007256);江苏省建设系统科技项目(2023ZD078);南京市建设行业科技计划项目(Ks2379);中建安装2022年度科技研发计划(AZ-2022-04)。

摘　　要：盾构法具有适用范围广、施工速度快、施工质量好等优点。为探究双线隧道盾构施工引起的地表沉降对隧道间既有桩基变形的影响特征,以无锡地铁某区间隧道盾构开挖工程为依托,采用有限元法构建数值计算模型,对比了双线异步掘进(方案1)、右线隧道先施工(方案2)和左线隧道先施工(方案3)3种盾构施工方案的地面沉降和桩基变形,通过现场监测数据与模拟计算数据的对比分析,验证所建立数值模型的合理性。结果表明:方案1具有最小的地表沉降和桩基变形,方案2地表沉降和桩基变形最大,方案3的地表沉降和桩基变形比方案2小。研究结果可为类似拟建和在建盾构隧道工程提供理论指导与参考。The shield construction is widely used because of its strong applicability,fast construction speed,guaranteed construction quality,and other advantages.Based on the finite element model of double-line tunnel of Wuxi Metro,the influence of shield construction under the pedestrian bridge pile foundation was investigated.Three construction schemes were implemented to analyze surface settlement and pile foundation deformation with different shield conditions.Compared with the field monitoring data,the results of the numerical model were discussed.It states that the surface settlement and pile foundation deformation in scheme 1 was smallest,while those in scheme 2 was largest.The surface settlement and pile foundation deformation of scheme 3 was smaller than that of scheme 2.For similar shield tunnel engineering,the findings in this paper can be used as theoretical guidance and reference.

关 键 词：隧道盾构施工 桩基础 地表沉降 数值模拟 现场监测 

分 类 号：TU94[建筑科学—建筑技术科学]