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2015 Vol.14, Issue 4 Preview Page
Observed Long-term Water Content Change in Concrete Track Roadbed by Rainfall

콘크리트궤도노반에서의 강우량에 따른 장기 함수비 변화

Chanyong Choi1*
,
Hunki Kim2
,
Sangbeom Yang3
,
KiYoung Eum4
최 찬용1*
,
김 현기2
,
양 상범3
,
엄 기영4
1Senior Researcher, High Speed Research Division, Korea Railroad Resarch Institute
2Senior Researcher, High Speed Research Division, Korea Railroad Resarch Institute
3Researcher, High Speed Research Division, Korea Railroad Resarch Institute
4Chief Researcher, High Speed Research Division, Korea Railroad Resarch Institute
*교신저자. *Corresponding Author. 
30 December 2015. pp. 35-43
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Abstract

In this study, it was performed in characteristics of settlement of roadbed materials with variation of water content using cylinder model device. The ratio of settlement () of subgrade soils in the initial water content were about 2.08, whereas it was increased about 4.06 which resulted in increase two times in the initial water content. Also, it was monitoring long-term to measure variation of the field water contents at concrete track using rainfall measuring sensors. The water content at directly underneath of concrete track rarely seems to affect the variation of water content, but it was increased by about 4% than intial water content with 20 mm/hr rainfall index at slope section. As for the result from the field date, it was determined that the water content of the inner subgrade layer was rarely affect caused by more than 20 mm/h rainfall index during if good drainage system at concrete track properly maintained.

Keywords
Water content
Concrete track
Cylinder model box
Rainfall

원형모형실험을 통해 철도노반재료로 사용되는 흙을 대상으로 함수비 변화에 따른 침하관계를 평가하였다. 초기 함수비에서 침하량비()는 2.08이었으나, 초기함수비보다 2배 이상으로 함수비가 증가되었을 때 침하량비()는 4.06으로 4배 이상의 침하가 발생하였다. 또한 실제 공용중인 콘크리트궤도에서 계측된 강우데이타를 기반으로 약 1년여간 현장에 매설된 함수비 측정장비를 통해 장기 함수비 변화추이를 관찰하였다. 콘크리트궤도의 직하부에 위치한 함수비는 강우강도에 따라 변화가 거의 없는 수준이며, 사면부에서는 최대 강우강도 20mm/hr가 초과되는 경우 약 4% 정도의 함수비 변화가 생기는 것을 볼 수 있다. 이러한 변화정도를 볼 때 콘크리트 궤도의 경우 배수성능이 적절히 유지된다면 노반 내부의 함수비 변화는 강우에 대하여 영향이 매우 미비할 것으로 판단된다.

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Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 14
  • No :4
  • Pages :35-43
  • Received Date : 2015-09-25
  • Revised Date : 2015-10-27
  • Accepted Date : 2015-10-28
  • DOI :https://doi.org/10.12814/jkgss.2015.14.4.035
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