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Stability evaluation of reinforced earth walls based on large-scale modular blocks

대형 축조블록을 이용한 보강토옹벽의 안정성 평가

Jung-Geun Han1
,
Min-Woo Kim2
,
Kikwon Hong3*
,
Jung-Mann Yun4
한 중근1
,
김 민우2
,
홍 기권3*
,
윤 중만4
1Professor, School of Civil and Environmental Engineering, Urban Design and Study, Chung-Ang Univ.
2Formerly graduate student, The graduate school of construction engineering, Chung-Ang Univ.
3Research Professor, School of Civil and Environmental Engineering, Urban Design and Study, Chung-Ang Univ.
4Professor, Department of Construction Information System, Shin Ansan Univ.
*교신저자. *Corresponding Author. 
30 December 2014. pp. 143-151
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Abstract

This paper describes external and internal stability of reinforced earth wall using large-scale modular block and geogrid reinforcement. The evaluation for external and internal stability was conducted to analyze effect of wall height, reinforced soil (or backfill soils) and reinforcement strength. The external stability showed that the analysis cases were satisfied with design criteria, when the required minimum length and vertical spacing of reinforcement were 0.7H and 1m, respectively. The internal stability conformed that some cases were satisfied with design criteria in 25° of internal friction angle of reinforced soil. Expecially, it will be applicable as wall structure considering a structural stability and economic efficiency based on evaluation of internal stability.

Keywords
Large-scale modular block
Reinforced earth wall
External and internal stability
Geogrid

본 연구에서는 대형 축조블록과 지오그리드 보강재를 이용한 보강토 옹벽의 안정성을 검토하였으며, 이를 바탕으로 구조물의 적용에 대하여 평가하였다. 안정성은 옹벽높이, 뒤채움 흙의 강도 및 지오그리드 보강재의 강도 조건에 따른 외적 및 내적안정성을 검토하였다. 외적안정성 분석 결과, 보강재의 길이는 전면벽체 저면으로부터 산정된 옹벽높이의 0.7H와 보강재 수직 간격을 1m로 설치하였을 때, 뒤채움 흙의 내부마찰각 및 옹벽 높이에 관계없이 모든 해석조건에서 기준안전율을 만족하였다. 내적안정성의 경우에는 뒤채움 흙의 내부마찰각이 25°인 경우에도 일부 옹벽 높이에서 파단 및 인발에 대한 안정성이 확보할 수 있는 것으로 나타났다. 특히, 내적안정성 평가결과를 바탕으로 대하여 구조적 안정성 및 경제성을 고려할 수 있는 구조물로의 적용이 가능할 것으로 확인되었다.

References
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Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 13
  • No :4
  • Pages :143-151
  • Received Date : 2014-10-14
  • Revised Date : 2014-12-02
  • Accepted Date : 2014-12-04
  • DOI :https://doi.org/10.12814/jkgss.2014.13.4.143
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