KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Excavation Behavior of an Earth Retaining Wall Supported by Large Diameter Soil-cement Blocks

대구경 소일-시멘트 교반체로 보강한 토류벽의 굴착 시 거동 분석

  • 김영석 (한국건설기술연구원 기반시설연구본부 지반연구실) ;
  • 주진현 (한국건설기술연구원 기반시설연구본부 지반연구실) ;
  • 조용상 (삼성물산(주) 건설부문 TA팀)
  • Received : 2010.10.06
  • Accepted : 2011.01.15
  • Published : 2011.04.30
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Abstract

This paper presents an analysis of excavation behavior of an earth retaining wall supported by large diameter soil-cement blocks at a field trial site. The concept and design philosophy of the large soil-cement block reinforcement are described first. The wall behavior during sequential excavations up to 9.8 m is analyzed based on the measured lateral wall movements and earth pressures. The settlements of adjacent ground are examined by field measurements and inverse numerical analysis. The results indicate that, when the lengths of the soil-cement blocks were over 0.45 H (H: wall height), the displacements and the earth pressures induced by the excavations were similar to those supported by conventional methods such as soil nailing.

본 논문에서는 대구경 소일-시멘트 교반체를 보강재로 적용한 토류벽의 굴착 시 거동을 현장 시험시공 결과를 통해 분석하였다. 먼저 대구경 소일-시멘트 교반체 공법에 대한 설명 및 기본 설계개념을 기술하였다. 공법을 9.8 m 굴착 현장에 적용하면서 굴착 단계별 벽체의 거동을 수평변위 및 하중 계측자료를 바탕으로 분석하였으며, 굴착에 의해 발생한 인접지반의 변위를 침하 계측 및 수치해석을 통해 평가하였다. 분석 결과, 대구경 소일-시멘트 교반체로 보강된 벽체는 보강재 길이가 0.45 H (H:벽체 높이) 이상인 경우 변위 및 토압 발생 거동이 소일 네일링과 같은 기존 공법으로 지지된 토류벽과 유사한 것으로 나타났다.

Keywords

References

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