Study on the Calculation Method of Thrust Force for Three-Circular-Ring Interlocking Pipe-Jacking
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 7 416.6 kN and 8 781.6 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.
pipe curtain methodinterlocking pipe jackingcontact pressurethrust force
万方数据
维普
