Stability Evaluation of Sheet-pile Walls during Excavation Works in Soft Ground

연약지반 굴착시 강널말뚝 흙막이벽의 안정성 평가

  • Hong, Won-Pyo (Dept. of Civil & Envir. Eng., Chung-Ang University) ;
  • Kim, Dong-Wook (Geol. & Envir. Hazards Div., Korea Institute of Geoscience & Mineral Resources) ;
  • Song, Young-Suk (Incheon Int. Airport Phase 2, Kumho Industrial Co./Construction Business Unit) ;
  • Lee, Jae-Ho (Dept. of Civil Engineering, Chung-Ang University)
  • 홍원표 (중앙대학교 건설환경공학과) ;
  • 김동욱 (한국지질자원연구원 지질환경재해연구부) ;
  • 송영석 (금호산업(주)/건설 인천국제공항 2단계) ;
  • 이재호 (중앙대학교 대학원 토목공학과)
  • Published : 2005.03.25

Abstract

Based on the field measuring data obtained from excavation sections in Inchon International Airport project, the relationships between the horizontal displacement of sheet-pile walls and the deformations of soft ground around the excavation were investigated. The horizontal displacements of walls according to supporting method are largely occurred in order of anchors, anchors with struts, and struts. The depths of maximum horizontal displacement are varied with supporting systems. If the stability number shows lower than ${\pi}$, the maximum horizontal displacement and the velocity of maximum horizontal displacement are respectively developed less than 1% of excavation depth and 1mm/day. When the stability number shows lower than ${\pi}+2$, the maximum horizontal displacement and the velocity are respectively developed less than 2.5% of excavation depth and 2mm/day. Also, when the stability number shows more than ${\pi}+2$, the maximum horizontal displacement and the velocity are rapidly increased.

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