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Analysis of the Relationship between Concrete Slab Track Life and Secondary Compression Characteristics in Soft Clay

점토의 2차 압축특성과 콘크리트궤도 수명과의 상관성 분석

Lee, Sang-Cheol;Cho, Kook-Hwan
이상철;조국환

  • Received : 2016.03.09
  • Accepted : 2016.04.07
  • Published : 2016.04.30

Abstract

Concrete slab track was applied to the Gyeoungbu High Speed Railroad step 2 and the Honam High Speed Railroad. Concrete slab track incurs higher construction cost and lower maintenance cost than existing gravel track. For these reasons, the use of concrete slab track has increased in Korea. The biggest problem in the use of concrete slab track is repairing damage from settlement that can occur while trains are in service. High speed railroad design standards require allowable residual settlement of concrete slab track of less than 25mm. In order to satisfy the requirement of long term stability of concrete slab track, it is necessary to manage the secondary compression settlement within the allowable residual settlement. This study is to evaluate the secondary compression settlement with the variation of the secondary compression index, thickness of soft ground, and concrete slab track life. Statistical analysis is performed to determine the probability of distribution of areas where serious problems will be caused after the concrete slab track is constructed.

Keywords

Concrete track;Secondary compression settlement;Long term settlement;Secondary compression index

References

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Acknowledgement

Supported by : 국토교통과학기술진흥원