Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)

Korean Geotechnical Society (한국지반공학회)
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Modified FHWA Design Method Considering Bending Stiffness of Soil Nail

휨강성을 고려한 수정 FHWA 쏘일네일 설계법 제안

  • Kim, Nak-Kyung (Dept. of Civil Engineering, SungKyunKyan University) ;
  • Jung, Jung-Hee (Dept. of Civil Engineering, SungKyunKyan University) ;
  • Ju, Yong-Sun (Dept. of Civil Engineering, SungKyunKyan University) ;
  • Kim, Sung-Kyu (Dept. of Civil Engineering, SungKyunKyan University)
  • 김낙경 (성균관대학교 토목공학과) ;
  • 정정희 (성균관대학교 토목공학과) ;
  • 주용선 (성균관대학교 토목공학과) ;
  • 김성규 (성균관대학교 토목공학과)
  • Published : 2008.03.28
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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(1990) 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.

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