Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)
- 2005.03a
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- Pages.346-353
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- 2005
Evaluation on the condition and quality of railway track substructure
궤도노반의 상태 및 품질평가에 관한 연구
- Kim, Dae-Sang (Korea Railroad Research Institute) ;
- Park, Tae-Soon (Seoul National University of Technology)
- Published : 2005.03.25
Abstract
Track substructure(ballast, subgrade) should have sufficient strength and adequate stiffness to fully support track superstructure(rail, fastener, sleeper). Vertical support stiffness of track comes from the sufficient thickness, adequate strength and stiffness of material of substructure layers. Since the vertical support stiffness of track substructure is closely related with the track geometry, the evaluation of the stiffness is very important to understand the track states. This paper introduces the system, which are composed of Ground Penetrating Radar(GPR), Portable Ballast Sampler(PBS), and Light Falling Weight Deflectometer(LFWD), to evaluate substructure condition and summarizes the field test results performed with the reliable system.
Keywords
- Vertical support stiffness;
- Ground Penetrating Radar(GPR);
- Portable Ballast Sampler(PBS);
- Light Falling Weight Deflectometer(LFWD)