Journal of Yangtze River Scientific Research Institute ›› 2021, Vol. 38 ›› Issue (8): 97-103.DOI: 10.11988/ckyyb.20200671

• ROCK-SOIL ENGINEERING • Previous Articles     Next Articles

Sensitivity Analysis for Parameters of Buried Steel Pipes Based on Orthogonal Test Method

WU He-gao, YU Jin-hong, SHI Chang-zheng, SHI Ya-zhu   

  1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
  • Received:2020-07-07 Revised:2020-10-22 Online:2021-08-01 Published:2021-08-06

Abstract: In the design of buried steel pipes, the influences of surrounding soil and trench on the steel pipes need to be taken into consideration, which are researched inadequately. The sensitivities of such parameters inclusive of the deformation modulus E1 of backfill, the deformation modulus E2 of sand bedding, the bedding angle θ, the trench bottom width B, and the inclination angle α of trench sidewalls to test indices (maximum vertical deformation of pipe, circumferential bending stresses of pipe top, springline, and bottom) were examined via an orthogonal test method. Results suggest that E1, E2, and α are highly sensitive to the test indices, while B bears low sensitivity to the test indices, and θ has the lowest sensitivity. The high soil deformation modulus and narrow excavation trench are beneficial to the structure of buried steel pipes, while the inclination angle of trench sidewalls has a complex influence on pipes and needs to be analyzed in line with specific situation. The research findings provide references for the parameter design of buried steel pipes.

Key words: buried steel pipes, sensitivity analysis for parameters, orthogonal test method, finite element method, structure design

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