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Analysis of Priority Investments for Preventing Roadside Slope Failures

도로비탈면 투자우선순위 결정에 관한 연구

  • Kim, Seung-Hyun (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Kim, Hong-Gyun (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Oak, Young-Suk (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Lee, Jong-Hyun (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Koo, Ho-Bon (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
  • 김승현 (한국건설기술연구원 Geo-인프라연구실) ;
  • 김홍균 (한국건설기술연구원 Geo-인프라연구실) ;
  • 옥영석 (한국건설기술연구원 Geo-인프라연구실) ;
  • 이종현 (한국건설기술연구원 Geo-인프라연구실) ;
  • 구호본 (한국건설기술연구원 Geo-인프라연구실)
  • Received : 2013.08.23
  • Accepted : 2013.09.23
  • Published : 2013.09.30

Abstract

Prevention plans for landslide and slope disasters should be appropriate for a country's budget when considering a systematic investment plan. The systematic management of slopes adjacent to national highways should incorporate reasonable investment risk and the expected degree of damage should be calculated by considering the investment priorities. In terms of priority of investment, the major factors used to determine the degree of hazard are gradient, soil characteristics, RMR (Rock Mass Rating), stability interpretation, type of discontinuities, and history of collapse, among others. The likely consequences of slope failure can be determined by considering traffic volume, the number of lanes, and average vehicle risk. We performed such calculations regarding the priority of investment and performed a regression analysis for 392 slopes located in Yeongseo region, Gangwon province. The calculation results show that collapsed slopes have a higher priority for investment, as do slopes with a high proportion of dangerous sections and locations in valleys.

산사태나 비탈면 재해를 예방하기 위해서는 적절한 계획을 수립하여야 하며, 국가의 한정된 예산을 고려했을 때 체계적인 투자 계획이 마련되어야 한다. 국도 도로비탈면의 체계적인 관리와 합리적 투자 계획 수립을 위하여 위험도와 예상피해도를 고려하여 투자우선순위를 산출하였다. 투자우선순위에서 위험도 결정의 주요인자는 경사, 토질, RMR, 안정석해석, 불연속면 종류, 붕괴이력이며, 피해도는 교통량과 차선수, 평균차량위험도를 고려하여 결정하였다. 강원도 영서지방 392개소 비탈면에 대한 투자우선순위 산출 및 회귀분석 결과, 붕괴가 발생된 비탈면의 투자우선순위가 높은 것으로 확인되며, 위험구간비가 높은 비탈면, 계곡부가 존재하는 비탈면이 높은 투자우선순위를 차지하는 것으로 확인된다.

Keywords

References

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  1. Maintenance of Hazardous Steep Slopes on National Park Trails vol.26, pp.1, 2016, https://doi.org/10.9720/kseg.2016.1.129
  2. 베트남 중부지방 도로비탈면 노출 특성 및 조사우선순위 결정 연구 vol.27, pp.3, 2013, https://doi.org/10.9720/kseg.2017.3.275