버팀굴착에서 횡방향 토압에 대한 스트러트 주형보의 영향

Effects of Main Girder Beams with Struts on Lateral Earth Pressure in Braced Excavation

  • 김기범 (동부건설(주)) ;
  • 반재기 ((주)선진엔지니어링 종합건축사사무소) ;
  • 조성호 (중앙대학교 토목공학과) ;
  • 정영수 (중앙대학교 토목공학과) ;
  • 김석철 (중앙대학교 토목환경공학과)
  • 발행 : 2009.05.21

초록

MiStrut is a new method to establish structural stability in designing braced excavations by making a rigid connection between top-level steel beams and soldier beams. MiStrut has a function of working as a strut as well as supporting cover plates of top-level steel beams. The structural mechanism of MiStrut is supposed to reduce flexural deformation of soldier beams, which may lead to reduced lateral earth pressures behind excavation. In this research, for verification of the performance of MiStrut, shear-wave velocities of subsurface soil before and after excavation was compared. The rigid connection of main girder beams with soldir beams reduced shear-wave velocity by 67% and lateral earth pressures by 90%, which indicates that MiStrut is effective development in reducing lateral earth pressures on braced excavation.

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