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A case study on reinforcement and design application of reinforced earth wall using micro pile

마이크로 파일을 이용한 블록식 보강토옹벽의 보강 및 설계적용 사례 연구

Kikwon Hong1
,
Jung-Geun Han2
,
Kwang-Wu Lee3*
,
Jong-Beom Park4
홍 기권1
,
한 중근2
,
이 광우3*
,
박 종범4
1Research Professor, School of Civil and Environmental Engineering, Urban Design and Study, Chung-Ang Univ.
2Professor, School of Civil and Environmental Engineering, Urban Design and Study, Chung-Ang Univ.
3Senior Researcher, Geotechnical & Geo-Space Engineering, Univ. of Science & Technology
4Chief, Shinmyeong Construction Engineering
*교신저자. *Corresponding Author. 
30 December 2014. pp. 161-167
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Abstract

This paper describes reinforcement method of reinforced earth wall near the abutment. The excessive displacement of a case affected by reduction of bearing capacity due to macro-environment condition like a coast. That is, the front displacement of reinforced earth wall has been happening continuously due to strength reduction of foundation ground. The micro pile is applied to reinforcement method, in order to secure a bearing capacity and global slope stability of reinforced earth wall. The results of numerical analysis confirmed that reinforcement method based on micro pile can secure a stability of structure, while the reconstruction of reinforced earth wall is impossible by construction and macro-environment condition.

Keywords
Reinforced earth wall
Collapse
Micro pile
Front displacement
Bearing capacity

본 연구에서는 교대에 인접하여 시공된 보강토옹벽에서 발생한 구조물 변형에 대한 원인을 분석하였으며, 이를 바탕으로 시공된 보강토옹벽의 단면을 유지함과 동시에 구조물의 안정성을 확보할 수 있도록 마이크로 파일을 이용한 보강방안에 대하여 안정성을 평가하였다. 연구대상 구조물의 지속적인 변형은 구조물의 주변환경 조건에 큰 영향을 받은 것으로 나타났으며, 이는 기초지반의 지지력을 감소시켜 중요구조물로서의 안정성 저해요인으로 작용하였다. 이에 보강토옹벽의 지지력 및 전체사면에 대한 안정성을 확보할 수 있도록 보강방안으로 마이크로 파일을 적용하였으며, 이에 대한 안정성 평가 결과, 구조물의 변형 및 구조물을 포함하는 전체사면에 대한 안정성을 확보할 수 있는 것으로 확인되었다. 즉, 시공여건 및 주변환경 조건에 의해 보강토옹벽의 재시공이 불가능한 경우에는 마이크로 파일을 이용한 보강이 충분히 가능한 것으로 판단되었다.

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 :161-167
  • Received Date : 2014-10-27
  • Revised Date : 2014-12-12
  • Accepted Date : 2014-12-17
  • DOI :https://doi.org/10.12814/jkgss.2014.13.4.161
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