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Behavior Characteristics of Railway Roadbed Retained by Geosynthetic Reinforced Segmental Wall Under Train Load

열차 하중 작용 시 블록식 보강토 옹벽으로 지지된 철도 노반의 거동

  • Lee, Seong Hyeok (High speed Railway Research Division, Korea Railroad Research Institute) ;
  • Choi, Chan Yong (High speed Railway Research Division, Korea Railroad Research Institute) ;
  • Lee, Jin Wook (High speed Railway Research Division, Korea Railroad Research Institute)
  • Received : 2012.04.24
  • Accepted : 2012.10.05
  • Published : 2012.10.30

Abstract

Static and dynamic train load tests were conducted to evaluate the train load transfer mechanism in the roadbed which was retained by two types (fully and partially) of segmental retaining walls reinforced by geogrid. The test roadbed was 2.6m high, 5m wide, and 6m long. A combination of earth pressure gages, displacement transducers, and strain gages were placed in specific locations to measure the responses. Test results showed that the wall displacement pattern as well as the earth pressure for the fully reinforced retaining wall was different from those for the partially reinforced retaining wall. In the dynamic train load test, the strain in the upper part of the wall tended to decrease, and both the residual deformation and the rate of the deformation were significantly lower than those in the current design standard.

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