Evaluation of Geogrid-Reinforced Track substructure Effectiveness Using A Large-Scale Pullout Device
대형인발시험기를 이용한 지오그리드로 보강된 궤도하부구조층의 효율성 평가

Jeongho Oh
2014 Journal of The Korean Society of Disaster Information  
A number of attempts has been made to reinforce ballasted track substructure to meet the requirement of high-speed operation and effective rehabilitation of existing railroads. For the purpose of this, the use of geogrid has been applied, and the benefit of its use has been recognized via previous studies. In this study, an experimental pullout test was carried out to investigate the influence of normal stress on pullout strength of geogrid using different types of soil and geogrid. The results
more » ... revealed that the pullout resistance generally tends to increase proportional to normal stress while the pullout coefficient interaction decreases, which is a function of material interface properties, such as the friction angle of soil, and interlocking condition between soil and geogrid. In addition, a methodology based on work-energy concept was proposed to evaluate effectiveness of geogrid and limitedly verified using test results. Geogrid, Ballasted track substructure, Pullout coefficient of interaction, Pullout strength,
doi:10.15683/kosd.2014.10.1.040 fatcat:wyovjihrbvhj7l5gcs4dsun5ka