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Investigation of Behaviours of Wall and Adjacent Ground Considering Shape of Geosynthetic Retaining Wall

보강토 옹벽의 형상을 고려한 벽체 및 인접지반 거동 연구

Jong-Hyun Lee1
,
Dong-Wook Oh2
,
Suk-Min Kong3
,
Hyuk-Sang Jung4
,
Yong-Joo Lee5*
이 종현1
,
오 동욱2
,
공 석민3
,
정 혁상4
,
이 용주5*
1Graduate Student, Department of Civil Engineering, Seoul National Univ. of Science and Technology
2Graduate Student, Department of Civil Engineering, Seoul National Univ. of Science and Technology
3Graduate Student, Department of Civil Engineering, Seoul National Univ. of Science and Technology
4Professor, Department of Construction and Safety Engineering, Dongyang Univ.
5Professor, Department of Civil Engineering, Seoul National Univ. of Science and Technology
*교신저자. *Corresponding Author. 
30 March 2018. pp. 95-109
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Abstract

Recently, GRS (Geosynthetic Retaining Segmental) wall has been widely used as a method to replace concrete retaining wall because of its excellent structural stability and economic efficiency. It has been variously applied for foundation, slope, road as well as retaining wall. The GRS wall system, however, has a weak point that is serious crack of wall due to stress concentration at curved part of it. In this study, therefore, behaviour of GRS wall according to shape of it, shich has convex and concave, are analysed and compared using Finite Element analysis as the fundamental study for design optimization. Results including lateral deflection, settlements of ground surface and wall obtained from 2D FE analysis are compared between straight and curved parts from 3D FE analysis.

Keywords
Geosynthetic retaining wall system
Convex
Concave, Curved
Numerical analysis
Horizontal displacement

최근 보강토 공법은 구조적으로 안정성이 우수하고 경제성이 뛰어나 콘크리트 옹벽을 대체하는 공법으로 많이 사용되고 있으며, 옹벽뿐만 아니라 기초, 사면, 도로 등에 그 적용 범위가 다양하다. 그러나, 우수와 같은 침투수로 인해 전면 벽에서 충분한 안정성 을 확보하지 못하여 붕괴, 배부름 현상 등의 피해가 발생할 수 있고, 특히 곡선부에서는 응력집중 현상에 의해 전면 벽의 균열 등의 문제가 추가적으로 일어날 수 있다. 이는 보강토 옹벽 곡선부에 대한 정확한 설계 기준이 미흡하고 부실시공을 하는데 원인이 있다고 할 수 있다. 따라서 본 연구에서는 보강토 옹벽의 피해사례를 통해 문제점을 파악하고 유한요소 수치해석을 통해 보강토 옹벽 설계를 위한 기초 연구로서, 옹벽의 형상(볼록형, 오목형)에 따른 직선부와 곡선부의 거동을 비교･분석하였다.

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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 : 17
  • No :1
  • Pages :95-109
  • Received Date : 2018-02-05
  • Revised Date : 2018-03-14
  • Accepted Date : 2018-03-20
  • DOI :https://doi.org/10.12814/jkgss.2018.17.1.095
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