Journal of Korean Society of Forest Science (한국산림과학회지)

Korean Society of Forest Science (한국산림과학회)
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Bearing Capacity Reinforcing Effect of Forest Road Surface by Construction of Sub-base using Geosynthetics

토목섬유 활용 노반 조성을 통한 임도 노면지지력 강화효과 분석

  • Hwang, Jin-Seong (Forest Technology and Management Research Center, National Institute of Forest Science) ;
  • Ji, Byoung-Yun (Forest Technology and Management Research Center, National Institute of Forest Science) ;
  • Lee, Kwan-Hee (Forest Technology and Management Research Center, National Institute of Forest Science) ;
  • Kweon, Hyeong-Keun (Department of Forest Environment & Resources, Chungnam National University) ;
  • Kim, Myung-Hwan (Soolim Professional Forest Engineer Office)
  • 황진성 (국립산림과학원 산림기술경영연구소) ;
  • 지병윤 (국립산림과학원 산림기술경영연구소) ;
  • 이관희 (국립산림과학원 산림기술경영연구소) ;
  • 권형근 (충남대학교 산림환경자원학과) ;
  • 김명환 (수림산림기술사사무소)
  • Received : 2018.04.25
  • Accepted : 2018.05.24
  • Published : 2018.06.30
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Abstract

This study was carried out to establish the standard of sub-base facility which can strengthen road surface bearing capacity for smooth passage of logging trucks in forest road as the size of the logging truck has been increased in order to improve the efficiency of timber transportation. The results of reinforcement effect analysis of the surface bearing capacity by the thickness of sub-base prepared with the optimum aggregate mix ratio using geosynthetics for forest road on the soft ground in the Forest Technology and Management Research Center are as follows. The surface bearing capacity of CBR exceeding 15% was found to be sufficient when the sub-base was constructed over 0.2 m depth of laying gravels with installation of geosynthetics after digging out subsoil. However, there is no significant difference in reinforcement effect of surface bearing capacity by types of geosynthetics. And, it was found that the surface bearing capacity was insufficient in the installation of sub-base. Therefore, in the case of soft ground, It is possible to secure the reinforcement of the surface bearing capacity for the smooth passage of heavy logging trucks by sub-base, that was constructed over 0.2 m depth of laying gravels with installation of geosynthetics after digging out subsoil.

본 연구는 목재운송 효율을 도모하기 위하여 목재운송차량이 대형화 되어감에 따라 대형 목재운송차량의 원활한 임도 통행을 위한 노면지지력 확보할 수 있는 노반 시설기준을 마련하고자 실시하였다. 산림기술경영연구소 관내 연약지반 임도 노면에 대하여 토목섬유를 활용하여 적정 골재배합비로 조성한 노반의 두께별 노면지지력 강화효과를 분석한 결과는 다음과 같다. 토목섬유를 활용하여 상굴식으로 노반을 0.2 m 이상 포설한 시험구간은 노면지지력이 CBR 15% 이상으로 양호한 것으로 나타났다. 그러나 토목섬유 종류별 노면지지력 보강효과는 큰 차이가 없었고, 상치식으로 조성한 구간의 경우 노면지지력이 미흡한 것으로 나타났다. 따라서 연약지반 구간에서는 상굴식으로 터파기 한 후 토목섬유를 부설하고, 노반층 두께를 0.2 m 이상 조성한 후 표층을 포설하여야 대형 목재운송차량의 원활한 통행에 필요한 노면지지력 확보가 가능할 것으로 판단된다.

Keywords

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