• Journal of the Korean Society for Railway
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• v.20 no.1
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• pp.99-110
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• 2017

As a part of several Eurasian initiatives, the Korean government is trying to reconnect railways through North Korea to the Asian continent. If South Korea could build a network using railway, it would be a chance to develop a robust economic environment and to motivate economic growth. In the railway reconnection project between North and South Korea, the most important part of the railway roadbed sector is repair or improvement, and then construction of a new line through North Korea. There are not many big differences in the geological conditions; however, climate condition varies greatly during winter. The most significant condition in the safety of railway operation is frost-heaving. However, since South Korea has a relatively mild climate condition compared with North Korea, design and construction specifications under severe weather conditions in winter have not been prepared. This study proposes a plan for revising the railway design standard for underpass structures through an analysis of international standards, leading to site construction to prevent frost-heave.

• 한국도로학회지:도로
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• v.6 no.4 s.22
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• pp.37-44
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• 2004

• Journal of the Korean Geosynthetics Society
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• v.11 no.3
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• pp.19-25
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• 2012

In this study, a recycling plan for waste concrete fine aggregate as fill material was researched by investigating environmental engineering properties. It is noted that the environmental influence of waste concrete fine aggregate is little since chemical level is satisfied the waste management standard. Waste concrete fine aggregate is not suitable for materials of anti-frost layer and sub-base layer since the particle-size distribution and engineering properties are not partially satisfied the quality standard. However, waste concrete fine aggregate can be recycled as materials of anti-frost layer and sub-base layer if we improve the engineering properties by mixing bigger aggregates than maximum particle size (5 mm) more than 25 percent of total weight.

• Journal of the Korean Geosynthetics Society
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• v.12 no.1
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• pp.93-100
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• 2013

Frost heave occurs when ground temperature decreases under $0^{\circ}C$ and soil volume expands, which causes roadway and buried pipe line failure due to differential heaving. There are several models to predict volumetric strain caused by frost heave, but they requires expertises who have professional background and experience related to numerical analysis. This study presents an evaluation method to predict volumetric strain caused by frost heave with fundamental physical properties of soils. The evaluation method is assessed with experimental results.