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Study on the Performance Evaluation of CS-H Wall composed of Steel Fiber

강섬유를 이용한 CS-H 벽체의 성능 평가에 관한 연구

Nam-Jae YU1
,
Kang-Il Lee2*
유 남재1
,
이 강일2*
1Member, Deputy General Manager, Korea Conformity Laboratories
2Member, Professor, Dept. of Civil Engineering, Daejin University,
*교신저자. *Corresponding Author. 
30 June 2017. pp. 89-96
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Abstract

In this study, CS-H walls with large stiffness were constructed using geosythetics for use in excavation at a depth of 30 m or more in Korea, and in order to construct the CS-H wall suitable for the site conditions, the formulation was examined according to the change in the mixing ratio of the geosythetics and the slump value (slump flow) and as a result, in the target slump 180 mm and the slump flow 500 mm, the formulation was confirmed to meet the mechanical properties such as the initial bending strength, the long-term behavior, and the elastic modulus as well as the economic efficiency. However, in the slump flow 600 mm, the result indicated that the formulation was inappropriate in the mechanical properties such as the initial bending strength, the long-term behavior, and the elastic modulus.

Keywords
Deep excavation
Contiguous wall
Displacement control
Geosythetic
Compressive Strength

본 연구에서는 국내에서 30m 이상인 대심도에서 강성이 큰 CS-H벽체를 만들기 위하여 지반신소재를 이용하였으며 지반신소 재의 혼입율과 슬럼프(슬럼프 플로우) 값에 변화를 주어 현장여건에 맞는 배합을 실시하였으며 목표 슬럼프 180mm 및 슬럼프 플로우 500mm에서는 초기 휨강도, 장기 거동특성 및 탄성계수의 역학적 특성과 동시에 경제성을 모두 만족할 수 있는 배합을 확인하였으나 슬럼프 플로우 600mm에서는 역학적 특성 및 초기, 장기 거동특성에서 취약한 결과를 보였다.

References
1
Go, G. T. and Park, J. J, and Ryu, G. S., and Kim, S. Y (2013), “State-of-the-art on Development of Ultra-High Performance Concrete”, Korean society of civil engineers, pp.51-60.
2
Park, S. G., Kim, G. H., Kwon, S, A., and Jung, J. H. (2009), “A Study on Improvement of Bonding Shear Strength of Geogrid-Reinforced Asphalt Pavements” Korean society of civil engineers, Vol.29 No.5 pp.619-625.
3
Ju, H. J., Lee, D. H., Hwang, J. H., Kim, K. S., Choi, S. H., and Oh, Y. H. (2017), “Experimental Study for Evaluation of Torsional Behavior of Steel Fiber Reinforced Concrete Beams”, Architectural institute of korea, Vol.33 No.1 pp.383-384.
4
Korea Conformity Laboratories (2008), “Development of Ready-mixed Shotcrete for the Economical Recycling of Industrial by-product and the Improvement of Construction Quality”, pp.152-164.
5
Kumkang Co., Ltd. (2014), “Development of double hook steel fiber”
6
Choi, T. J. (2012) “Manufacturing and Performance Evaluation of structure nano-synthetic fiber for concrete”, Kunkuk University graduate thesis, pp.19-20.
Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 16
  • No :2
  • Pages :89-96
  • Received Date : 2017-05-22
  • Revised Date : 2017-06-13
  • Accepted Date : 2017-06-18
  • DOI :https://doi.org/10.12814/jkgss.2017.16.2.089
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