A study on the effect of pipe - soil relative stiffness on the behaviour of buried flexible pipes

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2010

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Bircan, Mehmet

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In this study, the effect of pipe-soil relative stiffness on the behaviour of buried flexible pipes was investigated considering the pipe size, material type, stiffness, pipe-soil and natural soil-backfill interfaces and geometry of the trench using the finite element method. For this purpose, a parametric study was conducted to examine the effect of different variables on the resulting earth loads and deformations imposed on the buried pipes. Various types of trench pipe-soil cases were analysed for a certain natural ground and backfill material by the PLAXIS finite element code which allows simulating non-linear soil behaviour, the stages of construction as well as the pipe-soil interaction aspects of the problem. Loads and deformations obtained by the finite element method were compared with those calculated by the conventional approaches for different pipe-soil stiffness ratios. The finite element results obtained for the deformation of typically flexible Polyethylene pipes were then used to back-calculate the range of modulus of soil reaction, E', values for various pipe-soil relative stiffness and they were compared with the suggested value proposed by Howard (1977).

Subject Keywords

Civil engineering.

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http://etd.lib.metu.edu.tr/upload/2/12611562/index.pdf
https://hdl.handle.net/11511/19359

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

M. Bircan, “A study on the effect of pipe - soil relative stiffness on the behaviour of buried flexible pipes,” M.S. - Master of Science, Middle East Technical University, 2010.