Journal of shanghai Jiaotong University (Science) ›› 2017, Vol. 22 ›› Issue (5): 536-540.doi: 10.1007/s12204-017-1867-8

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Effect of Orthogonal Stiffeners on the Stability of Axially Compressed Steel Jacking Pipe

Effect of Orthogonal Stiffeners on the Stability of Axially Compressed Steel Jacking Pipe

ZHEN Lianga (甑亮), CHEN Jinjiana* (陈锦剑), WANG Jianhuaa (王建华), QIAO Pizhongb,c (乔丕忠)   

  1. (a. Department of Civil Engineering; b. State Key Laboratory of Ocean Engineering; c. Department of Engineering Mechanics, Shanghai Jiao Tong University, Shanghai 200240, China)
  2. (a. Department of Civil Engineering; b. State Key Laboratory of Ocean Engineering; c. Department of Engineering Mechanics, Shanghai Jiao Tong University, Shanghai 200240, China)
  • Online:2017-09-30 Published:2017-09-30
  • Contact: CHEN Jinjian(陈锦剑) E-mail:chenjj29@sjtu.edu.cn

Abstract: Load conditions for steel pipe-jacking are complex during the construction stage. The stability of steel jacking pipe has been an increasingly important problem as jacking forces, pipe diameters and jacking distances increase. However, there are no standards for pipe reinforcement, for prevention of buckling, or for remedying pipe that buckles when being jacked axially. Past experience suggests that stiffeners can effectively reinforce the structure. This study analyzes the effect of different stiffeners on the stability of steel jacking pipe under axial compression using finite element analysis. The results suggest that the stability of steel jacking pipe can be significantly improved by using orthogonal stiffeners, in terms of engineering costs and construction space inside the pipe. Based on current engineering practice, the application of orthogonal stiffeners is discussed. This study provides a useful reference for the design and construction of steel jacking pipe.

Key words: steel pipe-jacking| stiffeners| numerical simulation| stability analysis

摘要: Load conditions for steel pipe-jacking are complex during the construction stage. The stability of steel jacking pipe has been an increasingly important problem as jacking forces, pipe diameters and jacking distances increase. However, there are no standards for pipe reinforcement, for prevention of buckling, or for remedying pipe that buckles when being jacked axially. Past experience suggests that stiffeners can effectively reinforce the structure. This study analyzes the effect of different stiffeners on the stability of steel jacking pipe under axial compression using finite element analysis. The results suggest that the stability of steel jacking pipe can be significantly improved by using orthogonal stiffeners, in terms of engineering costs and construction space inside the pipe. Based on current engineering practice, the application of orthogonal stiffeners is discussed. This study provides a useful reference for the design and construction of steel jacking pipe.

关键词: steel pipe-jacking| stiffeners| numerical simulation| stability analysis

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