A Tunnel Mock-up Test and Numerical Analysis on Steel Fiber Reinforced Shotcrete

강섬유 보강 숏크리트의 터널모형실험 및 수치해석적 검증

  • 유광호 (수원대학교 토목공학과) ;
  • 정지성 (수원대학교 토목공학과) ;
  • 박연준 (수원대학교 토목공학과)
  • Published : 2008.04.30

Abstract

In this study, the failure and deformation characteristics of steel fiber reinforced shotcrete (SFRS) which is a primary tunnel support was investigated to find out ground-support mutual behavior. To this end, a mock-up of a tunnel was made and experimented with the conditions of lateral earth pressure coefficient 0.5 and 1.0. During the tests, 11 hydraulic cylinders were used for loading. for better simulation of the lateral earth pressure effect, these cylinders were controlled separately by two groups; crown and side wall. Meanwhile, the deformation of shotcrete was measured by 11 LVDTs. Backfill material was also used fur better load transfer from hydraulic cylinders to shotcrete. For the validation of the mock-up test results, 3D numerical analysis is carried out. To do numerical analysis under the same condition as a mock-up test, the load history curve which was obtained during the test was tried to be simulated using an individual FISH routine in the numerical analysis.

Keywords

Tunnel mock-up test;Steel fiber reinforced shotcrete

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