전면벽체 강성에 따른 쏘일네일링 벽체의 거동특성에 관한 실험적 고찰

An Experimental Study of the Soil Nailed Wall Behavior with Front Plate Rigidity

  • Kim, Hong-Taek (Member, Professor, Dept. of Civil Engrg., Hong-ik Univ.) ;
  • Kang, In-Kyu (Member, Chief Engineer, Vniel Consultant Co., Ltd.) ;
  • Kwon, Young-Ho (Member, Manager, R&D Center, Halla Engrg. & Construction Corp.) ;
  • Park, Si-Sam (Member, Graduate Student, Dept. of Civil Engrg., Hong-Ik Univ.) ;
  • Cho, Yong-Hoon (Engineer, Dohwa Consulting Engineering Co., Ltd.)
  • 발행 : 2002.06.01

초록

최근 들어 국내에서는 경제적이고 효율적인 지하굴착공법으로 쏘일네일링 벽체와 지하구조물 외벽을 합벽처리하는 사례가 많아지고 있으며, 이같은 지하외벽 일체식 쏘일네일링 공법은 기존의 지보공법과 비교해 볼 때 굴착면적을 최소화하고 시공성을 개선할 수 있는 특징 이 있다. 또한 지하외벽 일체식 쏘일네일링 공법은 지하외벽의 단면 축소와 지하수에 의한 양압력의 영향에도 대처할 수 있는 장점이 있으나 아직까지는 이에 대한 연구가 미흡하여 보수적으로 설계되고 있는 실정이다. 이를 위해 본 연구에서는 실내모형실험을 통해 전면벽체의 강성에 따른 쏘일네일링 보강토체의 거동 및 네일의 두부에 작용하는 인발력을 분석하여 전면벽체의 강성에 따른 쏘일네일링 벽체의 파괴유형을 규명하고 사용상태 및 한계상태에서의 변위양상 및 네일 두부에서의 인장력 분포를 분석하였다. 또한 전면판의 강성이 쏘일네일링 벽테의 전체 안정성에 미치는 영향을 분석하였으며, 향후 전면벽체의 강성에 따른 지반-네일의 상호작용에 대한 모델개발에 필요한 기초적인 자료를 제공하고자 한다.

Recently, there have been numerous attempts to expand the traditional temporary soil nailing system into a permanent wall. Two reasons for this include the soil nailed system's advantage of efficient and economic use of subgrade space and its ability to decrease the total construction cost. However, the systematic and logical design approach has not been proposed yet. The permanent soil nailing wall system, which utilizes precast concrete from soil nailing system, is already used in many countries, but the study of cast-in-place concrete lacing or rigid walls in bottom-up construction of traditional soil nailing walls is imperfect and insufficient. In this paper, various laboratory model tests have been carried out to investigate the influence of parameters, including stiffness of the rigid wall to the soil nailing structure with respect to failure mode, displacement patterns and tensile forces at the nail head in several levels of load. Then, the variation of earth pressure distribution on the soil nailing wall, built with a rigid front plate, is sought through different levels of surcharge load and tensile forces at the nail head.

키워드

참고문헌

  1. Manual for Design and Construction Monitoring of Soil Nail Walls FHWA
  2. Behavior and Working Stress Design of Soil Nailed Retaining Structure, Performance of Reinforced Soil Structures Juran, I.;Elias, V.
  3. Proc. of the KGS Spring '02 National Conference An Experimental Study of the Soil Nailed Wall Behavior with Front Plate Rigidity Kim, Hong-Taek;Kang, In-Kyu;Kwon, Young-Ho;Park, Si-Sam;Cho, Yong-Hoon
  4. Jour. of the KGS. v.17 no.2 An Experimental Study on Reinforcing Effects for Soil Structures Reinforced by Nail with an Anchor Shape Kim, Joon-Seok;Lee, Sang-Duk;Lee, Seung-Rae
  5. French National Rearch Project Report, No FHWA-SA-93-026 Recommendations Clouterre / Soil Nailing Recommendations Schlosser, F.
  6. Jour. of the KGS. v.17 no.5 Centrifuge Model Tests on the Behavior and Failure Mechanism of Soil Nailing Systems Under Surcharges Yoo, Nam-Jae;Kim, Young-Gil;Park, Byung-Soo;Hong, Young-Kil