손명수
(Ministry of Land, Infrastructure and Transport, Graduate School of Railway Seoul National University of Science & Technology)
,
임성택
(Graduate School of Railway Seoul National University of Science & Technology)
,
조국환
(Dept of Railway Construction Engineering, Graduate School of Railway, Seoul National University of Science & Technology)
국내 철도사업 중 토공구간에서 사업비 저감을 위해 터널 건설로 발생하는 암버력을 이용한 쌓기가 활발하게 이루어지고 있다. 그러나 노반 및 원지반에서 잔류침하가 궤도의 허용잔류침하량을 초과한다면, 궤도 안정화를 위해 많은 시간과 비용이 소요된다. 암버력을 이용한 쌓기체에 관한 연구는 댐 및 도로분야에서 주로 이루어져있고, 철도분야에서의 연구는 실내시험을 통한 쌓기체의 다짐특성 및 침하분석에 편중되어 있다. 따라서 실제 현장에서의 암버력을 이용한 쌓기체의 장기침하 거동예측에 관한 연구는 아직 미미한 상태이다. 이에, 본 연구에서는 고속철도 노반신설 공사 중 방치기간 이후 장기침하 발생이 예상되는 쌓기높이가 20m 이상 되는 높은 구간에 대하여 현장계측을 수행하였다. Kelvin Body Model을 통해 크리프 변수를 역해석으로 추정하며 이를 수치해석에 적용하여 국내 고속철도 노반의 잔류침하량 및 침하기간을 예측하는 기법을 제시하고자 한다.
국내 철도사업 중 토공구간에서 사업비 저감을 위해 터널 건설로 발생하는 암버력을 이용한 쌓기가 활발하게 이루어지고 있다. 그러나 노반 및 원지반에서 잔류침하가 궤도의 허용잔류침하량을 초과한다면, 궤도 안정화를 위해 많은 시간과 비용이 소요된다. 암버력을 이용한 쌓기체에 관한 연구는 댐 및 도로분야에서 주로 이루어져있고, 철도분야에서의 연구는 실내시험을 통한 쌓기체의 다짐특성 및 침하분석에 편중되어 있다. 따라서 실제 현장에서의 암버력을 이용한 쌓기체의 장기침하 거동예측에 관한 연구는 아직 미미한 상태이다. 이에, 본 연구에서는 고속철도 노반신설 공사 중 방치기간 이후 장기침하 발생이 예상되는 쌓기높이가 20m 이상 되는 높은 구간에 대하여 현장계측을 수행하였다. Kelvin Body Model을 통해 크리프 변수를 역해석으로 추정하며 이를 수치해석에 적용하여 국내 고속철도 노반의 잔류침하량 및 침하기간을 예측하는 기법을 제시하고자 한다.
Railway embankments using crushed rock from tunnel construction are widely implemented to reduce construction costs. However, if residual settlement continuously occurs beyond allowable settlement after track construction, maintenance for railway safety operation may expend great resources of cost a...
Railway embankments using crushed rock from tunnel construction are widely implemented to reduce construction costs. However, if residual settlement continuously occurs beyond allowable settlement after track construction, maintenance for railway safety operation may expend great resources of cost and time. Research on rock fill embankments has mainly been performed in the areas of dams and roadways, while researches in railway field were mostly studied for compaction characteristics and settlement behaviors in laboratory. There are very few research results using field measurement to estimate long-term behavior of railway embankments. In this study, field measurements were conducted on over-20-meter-high railway embankments for which large and long-term residual settlement after track construction were expected. Using the back-analysis technique, creep parameters for the Kelvin Body Model are proposed and a numerical method to estimate the amount of and time for residual settlement are also proposed in this research.
Railway embankments using crushed rock from tunnel construction are widely implemented to reduce construction costs. However, if residual settlement continuously occurs beyond allowable settlement after track construction, maintenance for railway safety operation may expend great resources of cost and time. Research on rock fill embankments has mainly been performed in the areas of dams and roadways, while researches in railway field were mostly studied for compaction characteristics and settlement behaviors in laboratory. There are very few research results using field measurement to estimate long-term behavior of railway embankments. In this study, field measurements were conducted on over-20-meter-high railway embankments for which large and long-term residual settlement after track construction were expected. Using the back-analysis technique, creep parameters for the Kelvin Body Model are proposed and a numerical method to estimate the amount of and time for residual settlement are also proposed in this research.
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