Geomechanics and Engineering

  • 제2권3호
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  • Pages.161-176
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  • 2010
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

The effectiveness of geosynthetic reinforcement, tamping, and stoneblowing of railtrack ballast beds under dynamic loading: DEM analysis

  • Lobo-Guerrero, Sebastian (American Geotechnical & Environmental Services, Inc.) ;
  • Vallejo, Luis E. (Department of Civil and Environmental Engineering, University of Pittsburgh)
  • 투고 : 2010.03.16
  • 심사 : 2010.08.11
  • 발행 : 2010.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

Discrete Element Method (DEM) simulations were developed to investigate the effectiveness of geosynthetic reinforcement and the effectiveness of maintenance techniques performed on a simulated ballast bed subjected to dynamic loading. The results from four samples subjected each one to a total of 425 load cycles are presented: one unreinforced and unmaintained sample, one unmaintained but reinforced sample, one unreinforced sample subjected to maintenance in the form of stoneblowing after 200 load cycles, and one unreinforced sample subjected to maintenance in the form of tamping after 200 load cycles. The obtained values of permanent deformation as a function of the applied number of load cycles for the four cases are presented together allowing a comparison of the effectiveness of each technique. Moreover, snapshots of the simulated track sections are presented at different moments of the simulations. The simulations indicated that the geosynthetic reinforcement may not be beneficial for the analyzed case while stoneblowing was the most effective maintenance technique.

키워드

참고문헌

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피인용 문헌

  1. Micromechanics-Based Investigation of Fouled Ballast Using Large-Scale Triaxial Tests and Discrete Element Modeling vol.143, pp.2, 2017, https://doi.org/10.1061/(ASCE)GT.1943-5606.0001587
  2. Experimental and Discrete Element Modeling of Geocell-Stabilized Subballast Subjected to Cyclic Loading vol.142, pp.4, 2016, https://doi.org/10.1061/(ASCE)GT.1943-5606.0001431
  3. Numerical investigation of geocell reinforced slopes behavior by considering geocell geometry effect vol.24, pp.6, 2010, https://doi.org/10.12989/gae.2021.24.6.589