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Analysis on the characteristics of the earth pressure distribution induced by the integrated steel pipe-roof construction

일체형 강관 파이프루프 시공에 따른 주변 지반의 토압 분포 특성 분석

  • Sim, Youngjong (Land and Housing Institute, Korea Land and Housing Corporation) ;
  • Jin, Kyu-Nam (Land and Housing Institute, Korea Land and Housing Corporation) ;
  • Song, Ki-Il (Inha University, Dept. of Civil Engineering)
  • 심영종 (한국토지주택공사 토지주택연구원 건설환경연구실) ;
  • 진규남 (한국토지주택공사 토지주택연구원 건설환경연구실) ;
  • 송기일 (인하대학교 사회기반시스템공학부 토목공학전공)
  • Received : 2013.06.05
  • Accepted : 2013.07.30
  • Published : 2013.09.30

Abstract

In recent, various types of steel pipe-roof methods, which is reinforced by mortar after propulsion of steel pipe into the ground, have been used for the construction of trenchless underpass. Integrated steel pipe-roof has flexural stiffness and can resist against overburden load and reduce the stress acting on the concrete underpass structures. Due to arching effect, vertical and horizontal stress distribution around the steel pipe-roof is changing. In this study, therefore, the characteristic of stress distribution around the underpass induced by the construction of integrated steel pipe-roof is investigated by using numerical method. To examine the soil-structure interaction, interface element is introduced. Results show that vertical stress acting on the concrete structure placing inside the steel pipe-roof is significantly reduced due to arching effect and flexural stiffness of integrated steel pipe-roof. Design load can be reduced and effective design of underpass will be available if the earth pressure reduction due to arching effect is considered in the design stage.

Acknowledgement

Grant : 파이프루프의 지보강성을 고려한 비개착구조물의 최적설계

Supported by : 한국토지주택공사

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