Paper Title:
Investigating Particle-Size Effect on Uplift Mechanism of Pipes Buried in Sand Using Distinct Element Method
  Abstract

Uplift of pipeline due to buckling deformation and the resultant soil resistance are key concerns in its design. This paper investigates the particle-size effect on uplift resistance of a pipe buried in sand and the ground deformation mechanism using the distinct element method (DEM). Two granular grounds, one for coarse-sand ground and the other for fine-sand ground, were examined in this simulation. The results show that both cases exhibit similar deformation mechanism of four featured stages: mobilization of peak uplift resistance, infilling of soils beneath pipe, formation of shear bands, and flow of soils around pipe. The uplift resistances in both cases gradually increase to a peak and then drop to a constant value with the upward displacement of the pipe. However, higher peak resistance and shear bands with gentler slope are observed in the coarse case.

  Info
Periodical
Advanced Materials Research (Volumes 361-363)
Chapter
Chapter 4: Oil and Gas Well Development Projects
Edited by
Qunjie Xu, Honghua Ge and Junxi Zhang
Pages
505-509
DOI
10.4028/www.scientific.net/AMR.361-363.505
Citation
M. J. Jiang, W. C. Zhang, F. Liu, Z. F. Shen, "Investigating Particle-Size Effect on Uplift Mechanism of Pipes Buried in Sand Using Distinct Element Method", Advanced Materials Research, Vols. 361-363, pp. 505-509, 2012
Online since
October 2011
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