KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Study of the Soilnail-Slope Design Method Considering Bending Resistance of Soilnail

휨저항을 고려한 쏘일네일보강사면의 해석에 관한 연구

  • 주용선 (성균관대학교 건설환경시스템공학과) ;
  • 김낙경 (성균관대학교 건설환경시스템공학과) ;
  • 김성규 (성균관대학교 건설환경시스템공학과) ;
  • 박종식 ((주)한화건설 기술연구소)
  • Received : 2008.02.18
  • Accepted : 2008.09.05
  • Published : 2008.11.29
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Abstract

Soil nailing is used as a method of slope stabilization and excavation support. The design method of soil nail are based on experience or assumption of interaction between soil and reinforcement. Most design methods simply considers the tension of reinforcement for analysis of slope stabilization. Soil nails interact with soils under combined loading of shear and tension. Jewell & Pedley suggested a design equation of shear force with bending stiffness and discussed that the magnitude of the maximum shear force is small in comparison with the maximum axal force. However, they have used a very conservative limiting bearing stress on nails. This paper discusses that the shear strength of soil nails should not be disregarded with proper bearing stresses on nails. The modified FHWA design method was proposed by considering shear forces on nails with bending stiffness.

기존 쏘일네일사면 설계법들은 보강재, 주변지반 또는 이들의 상호작용에 대하여 각기 다른 가정들을 적용하고 있다. 다수의 방법에서는 단순하게 쏘일네일의 인장력만을 고려하여 이를 외력으로 적용하여 안정해석을 하고 있다. 하지만 쏘일네일사면은 사면을 구성하는 지반에 비하여 상대적으로 큰 휨저항성을 가지므로 쏘일네일의 휨강성을 고려한 안정해석법이 보다 현실적이고 공학적인 설계이다. 본 논문에서는 쏘일네일사면 설계시 쏘일네일의 휨저항성을 고려하며 이때 지반의 극한수평지지력에 따른 변화를 확인하고 이를 이용하여 수정된 FHWA 쏘일네일사면 설계법을 제안한다.

Keywords

References

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