Geomechanics and Engineering

  • 제34권6호
  • /
  • Pages.611-621
  • /
  • 2023
  • /
  • 2005-307X(pISSN)
  • /
  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Numerical investigation of effect of geotextile and pipe stiffness on buried pipe behavior

  • Candas Oner (School of Civil Engineering, Georgia Institute of Technology) ;
  • Selcuk Bildik (Department of Civil Engineering, Nisantasi University) ;
  • J. David Frost (School of Civil Engineering, Georgia Institute of Technology)
  • 투고 : 2022.06.12
  • 심사 : 2023.08.10
  • 발행 : 2023.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

This paper presents the results of a numerical investigation of the effect of geotextile reinforcement on underlying buried pipe behavior using PLAXIS 3D. In this study, variable parameters such as the in-plane stiffness of the geotextile, the pipe stiffness, the soil stiffness, the footing width, the geotextile width, and the location of the geotextile reinforcement layer are investigated. Deflections and bending moments acting on the pipe are evaluated for different combinations of variables and are presented graphically. It is observed that with an increase in the in-plane stiffness of the geotextile reinforcement, there is a tendency for a decrease in both deflections in the pipe and bending moments acting on the pipe. Conversely, with an increase in the pipe stiffness, geotextile reinforcement efficiency decreases. In the investigated region of soil stiffness, for the given pipe and geotextile stiffness, an optimum efficiency of geotextile is observed in medium dense soils. Further, it is shown that relative lengths of geotextile and footing has an important role on geotextile efficiency. Lastly, it is also demonstrated that relative location of geotextile layer with respect to the buried pipe plays an important role on the geotextile efficiency in reducing the bending moments acting on the pipe and deflections in the pipe. In general, geotextiles are more efficient in reducing the bending moments as opposed to reducing deflections of the pipe. Numerical validation is done with an experimental study from the literature to observe the applicability of the numerical model used.

키워드

과제정보

The participation of the first and third authors in the study reported in this manuscript was supported in part by the US National Science Foundation through the Engineering Research Center on Bio-mediated and Bio-inspired Geotechnics (CBBG). The NSF support through PTE Federal Award No. EEC-1449501 is gratefully acknowledged. The opinions in the manuscript are those of the authors and not the sponsor.

참고문헌

  1. Aria, S., Shukla, S.K. and Mohyeddin, A. (2017), "Optimum burial depth of geosynthetic reinforcement within sand bed on numerical investigation", Int. J. Geotech. Eng., 14(1), 71-79. https://doi.org/10.1080/19386362.2017.1404202.
  2. Aria, S., Shukla, S.J. and Mohyeddin, A. (2019), "Numerical investigation of wraparound geotextile reinforcement technique for strengthening foundation soil", Int. J. Geomech., 19(4). https://doi.org/10.1061/(ASCE)GM.1943-5622.0001361.
  3. Beju, Y.Z. and Mandal, J.N. (2017), "Combined use of Jute geotextile-EPS geofoam to protect flexible buried pipes: experimental and numerical studies", Int. J. Geosynth. Ground Eng., 3, Article Number: 32. https://doi.org/10.1007/s40891-017-0107-5.
  4. Bildik, S. and Laman, M. (2015), "Experimental investigation of the effects of pipe location on the bearing capacity", Geomech. Eng., 8(2), 221-235. https://doi.org/10.12989/gae.2015.8.2.221.
  5. Bildik, S. and Laman, M. (2019), "Experimental Investigation of Soil-Structure-Pipe Interaction", KSCE J. Civil Eng., 23, 3753-3763. https://doi.org/10.1007/s12205-019-0134-y.
  6. Bildik, S. and Laman, M. (2020), "Effect of geogrid reinforcement on soil-structure-pipe interaction in terms of bearing capacity, settlement and stress distribution", Geotext. Geomembranes, 48(6), 844-853. https://doi.org/10.1016/j.geotexmem.2020.07.004.
  7. Elshesheny, A., Mohamed, M., Nagy, N.M. and Sheehan, T. (2020), "Numerical behavior of buried flexible pipes in geogrid-reinforced soil under cyclic loading", Comput. Geotech., 122, 103493. https://doi.org/10.1016/j.compgeo.2020.103493.
  8. Fattah, M.Y., Hassan, W.H. and Rasheed, S.E. (2018), "Behavior of flexible buried pipes under geocell reinforced subbase subjected to cyclic loading", Int. J. Geotech. Earthq. Eng., 9(1), 22-41. https://doi.org/10.4018/IJGEE.2018010102.
  9. Hegde, A.M. and Sitharam, T.G. (2015), "Experimental and numerical studies on protection of buried pipelines and underground utilities using geocell", Geotext. Geomembranes, 45(3), 372-381. https://doi.org/10.1016/j.geotexmem.2015.04.010.
  10. Kou, Y., Shukla, S.K. and Mohyeddin, A. (2018), "Experimental investigation for pressure distribution on flexible conduit covered with sandy soil reinforced with geotextile reinforcement of varying widths", Tunn. Undergr. Sp. Tech., 80, 151-163. https://doi.org/10.1016/j.tust.2018.06.012.
  11. Kou, Y. and Shukla, S.K. (2019), "Analytical Investigation of Load Over Pipe Covered with Geosynthetic-Reinforced Sandy Soil", Int. J. Geosynth. Ground Eng., 5(1), 1-8. https://doi.org/10.1017/s40891-019-0156-z.
  12. Kou, Y. and Shukla, S.K. (2021), "Numerical modelling of unreinforced and geosynthetic reinforced sandy soil cover over large diameter HDPE and PVC pipes", Geotech. Geol. Eng., 39, 1689-1699. https://doi.org/10.1007/s10706-020-01548-3.
  13. Ma, Q., Ku, Z. and Xiao, H. (2019), "Model tests of earth pressure on buried rigid pipes and flexible pipes underneath expanded polystyrene (EPS)", Adv. Civil Eng., 2019, Article ID 9156129. https://doi.org/10.1155/2019/9156129.
  14. Pires, A.C.G. and Palmeira, E.M. (2017), "Geosynthetic protection for buried pipes subjected to surface surcharge loads", Int. J. Geosynth. Ground Eng., 3, Article Number: 30. https://doi.org/10.1007/s40891-017-0109-3.
  15. Pires, A.C.G. and Palmeira, E.M. (2021), "The influence of geosynthetic reinforcement on the mechanical behavior of soil-pipe systems", Geotext. Geomembranes, 49(5), 1117-1128. https://doi.org/10.1016/j.geotexmem.2021.03.006.
  16. Placido, R. and Portelinha, F.H.M. (2019), "Evaluation of geocomposite compressible layers as induced trench method applied to shallow buried pipelines", Geotext. Geomembranes, 47(5), 662-670. https://doi.org/10.1016/j.geotexmem.2019.103471.
  17. Wulandari, P.S. and Tjandra, D. (2015), "Analysis of geotextile reinforced road embankment using PLAXIS 2D", Procedia Eng., 125, 358-362. https://doi.org/10.1016/j.proeng.2015.11.075.