Reinforcing Effect of Geocell on Soft Soil Subgrade for High-speed Railroad

연약지반상 고속철도 노반 축조시 지오셀 시스템의 효과

  • 조삼덕 (한국건설기술연구원 토목연구부) ;
  • 윤수호 (한국건설기술연구원 토목연구부) ;
  • 김진만 (한국건설기술연구원 토목연구부) ;
  • 정문경 (한국건설기술연구원 토목연구부) ;
  • 김영윤 ((주) 보강기술)
  • Published : 2002.04.01

Abstract

This paper presents the results of plate load test and dynamic load test performed to evaluate the performance of geocell which is used to reinforce soft subgrade for high-speed railroad. Efficiency of geocell was observed in the increase in bearing capacity of subgrade and in the reduction of thickness of reinforced sub-ballast. One layer of geocell underlying a 10 cm thick cover soil led to an increase in bearing capacity three to four times larger than that of a crushed stone layer of the same thickness substituted for the geocell and cover soil layer Given the test conditions, the thickness of reinforced sub-ballast can be reduced by approximately 35 cm with the presence of geocell.

본 연구에서는 연약지반 상에 축조되는 고속철도 노반을 보강하기 위해 사용된 지오셀의 효과를 평가하기 위해 다양한 현장 평판재하시험과 동적 모형토조시험을 수행하였다. 실험결과로부터 지오셀 사용에 의한 보강노반의 두께 감소효과와 노상 지지력 증가효과가 평가되었다. 지오셀 1층과 복토 loom를 사용하면 동일한 두에의 쇄석층을 사용할 경우와 비교하여 3~4배의 지지력 개선효과가 있으며, 노반두께를 약 35cm 정도 감소시킬 수 있는 것으로 평가되었다.

Keywords

References

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