Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Design Improvement of the Road Expansion on a Deep Thick Soft Ground

대심도 연약지반 도로확장 공사에서의 설계 개선

  • Kim, Tae-Hyung (Department of Civil Engineering, Korea Maritime University) ;
  • Park, Tae-Young (Construction Office, Korea Expressway Corporation) ;
  • Kim, Sung-Ryul (Department of Civil Engineering, Dong-A University) ;
  • You, Sang-Ho (Samyoung Technology Corporation) ;
  • Kim, Kook-Han (Department of Civil Engineering, Korea Maritime University) ;
  • Kim, Yun-Tae (Department of Ocean Engineering, Pukyoung National University)
  • 김태형 (한국해양대학교 건설공학과) ;
  • 박태영 (한국도로공사 냉정부산건설사업단) ;
  • 김성렬 (동아대학교 토목공학과) ;
  • 유상호 ((주)삼영기술) ;
  • 김국한 (한국해양대학교 건설공학과) ;
  • 김윤태 (부경대학교 해양공학과)
  • Received : 2012.05.16
  • Accepted : 2012.07.19
  • Published : 2012.08.31
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Abstract

The expansion of a road on soft ground could induce an additional settlement to the existing road because of the consolidation characteristics of the soft soil layer subjected to additional load by an adjacent banking. In such case, the existing road could be faced with various problems during the stages of the construction and maintenance, such as deterioration of not only the surface smoothness yielding the decrease in automobile performance safety but also the structural stability of the embankment. These kinds of problems are expected to occur more freguently especially for the deep ground level with a fairly thick soft soil layer. Therefore, they should be examined and studied adequately during the design stage. As a reference case study, this paper deals with the project named Namhae Expressway of 2nd Branch with the soft soil layer with the thickness upto about 50m. After a lengthy review of the original design, an improved design is proposed.

연약지반 구간의 도로 확장공사는 연약지반의 특성으로 인해 우선 시행되는 확장 부 성토 시 발생되는 침하로 기존고속도로에 연동침하가 발생된다. 이 경우 지반침하 및 변형에 의한 포장 평탄성 불량, 차량 주행 안전성 저하, 구조물 안정성 감소 등 시공 및 기존도로 유지관리에서 많은 어려움을 유발한다. 특히 대심도 연약지반에서는 이와 같은 문제가 발생될 수 있는 여지가 대단히 높다. 따라서 이러한 문제점이 고려된 설계가 이루어져야 할 것이다. 본 연구에서는 연약지반 분포심도 최대 약 50m가 존재하는 남해고속도로 제2지선 확장공사를 대상으로 기존 설계안의 현황을 파악한 후 그 개선안을 제시하였다.

Keywords

References

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  1. 연약지반 도로확장공사 설계 개선에 따른 가치 평가 사례 vol.13, pp.1, 2012, https://doi.org/10.12814/jkgss.2014.13.1.001
  2. Value Engineering for Roadway Expansion Project over Deep Thick Soft Soils vol.142, pp.2, 2012, https://doi.org/10.1061/(asce)co.1943-7862.0001054