三圆咬合顶管顶推力计算方法研究  

Study on the Calculation Method of Thrust Force for Three-Circular-Ring Interlocking Pipe-Jacking

作　　者：钱朋亮 QIAN Pengiang(China Railway Construction Urban Construction and Transportation Development Co.Ltd.,Suzhou Jiangsu 215000,China)

机构地区：[1]中铁建城建交通发展有限公司,江苏苏州215000

出　　处：《铁道建筑技术》2024年第10期71-76,共6页Railway Construction Technology

基　　金：中铁二十局集团有限公司科技研发项目(YF2301SD01A)。

摘　　要：顶推力是管幕顶管施工反力墙设计以及顶管机选型重要参数。依托三亚河口通道项目管幕段工程,采用Persson接触模型对三圆咬合顶管顶推力进行研究,结合管土接触影响下的顶推力计算公式,分析顶推力与顶管咬合程度的关系,最后结合现场实测数据进行对比分析。结果表明:根据咬合程度不同,三圆咬合顶管接触压力合力为1.34~4.04 G;三亚河口通道项目三圆咬合顶管所需顶推力区间为7416.6~8781.6 kN;与现场实测数据进行对比,依据本研究得出的顶推力为现场实测顶推力最大值的1.38倍,具有一定的安全储备且能够节约成本,可供后续类似工程参考。The thrust force is a crucial parameter in the construction of pipe-jacking projects,the design of reaction walls,and the selection of pipe-jacking machinery.This study draws on the pipe-curtain section of the Sanya River Mouth Channel project and employs the Persson contact model to investigate the thrust force associated with the three-circular-ring interlocking pipe-jacking,considering the influence of soil-pipe contact on the thrust force calculation formula.Additionally,the study examines the correlation between the thrust force and the extent of pipe interlocking.The findings are further validated through a comparison with actual on-site measurement data.The study reveals that the combined contact pressure for the three-circular-ring interlocking pipe-jacking varies from 1.34 G to 4.04 G,depending on the level of interlocking.For the Sanya River Mouth Channel project,the estimated thrust force necessary for the three-circular-ring interlocking pipe-jacking is between 7416.6 kN and 8781.6 kN.When compared with on-site measurements,the formula-derived thrust force is determined to be 1.38 times the maximum measured value on-site,indicating a certain safety reserve and potential cost savings.These findings provide valuable insights for the design and execution of similar engineering projects in the future.

关 键 词：管幕法 咬合顶管 接触压力 顶推力 

分 类 号：U455.47[建筑科学—桥梁与隧道工程]