Upper and Lower Bound Solutions for Pile-Soil-Tunnel Interaction

한계해석법에 의한 파일-지반-터널 상호작용 해석

  • Lee Yong-Joo (Department of Civil Engineering, Korea Rail Road Institute) ;
  • Shin Jong-Ho (Department of Civil Engineering, Konkuk University)
  • 이용주 (한국철도기술연구원, 궤도토목연구본부, 궤도노반연구그룹) ;
  • 신종호 (건국대학교, 토목공학과)
  • Published : 2005.04.01

Abstract

In urban areas, new tunnel construction work is often taking place adjacent to existing piled foundations. In this case, careful assessment for the pile-soil-tunnel interaction is required. However, research on this topic has not been much reported, and currently only limited information is available. In this study, the complex pile-soil-tunnel interaction is investigated using the upper and lower bound methods based on kinematically possible failure mechanism and statically admissible stress field respectively. It is believed that the limit theorem is useful in understanding the complicated interaction behaviour mechanism and applicable to the pile-soil-tunnel interaction problem. The results are compared with numerical analysis. The material deformation patterns and strain data from the FE output are shown to compare well with the equivalent physical model tests. Admissible stress fields and the failure mechanisms are presented and used to develop upper and lower bound solutions to assess minimum support pressures within the tunnel.