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2013 Vol.29, Issue 1 Preview Page
A Characteristics of the Strength Recovery of the Soil Adjacent to the Pile Depending on the Construction Methods of a Environment-friendly Screw Concrete Pile for a Noise- and Vibration-free Method

무소음･무진동을 위한 환경친화적인 스크류콘크리트말뚝의 시공법에 따른 말뚝 인접 지반의 강도 회복 특성

Dong-Chul Kim1
,
Youngkyu Choi2*
김 동철1
,
최 용규2*
1Adjunct professor, Department of Civil. Engineering, Kyungsung University
2Professor, Department of Civil. Engineering, Kyungsung University
1경성대학교 외래교수
2경성대학교 교수
*교신저자. *Corresponding Author. 
31 January 2013. pp. 71-80
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Abstract

Before and after the test constructions, and after an 11-month hiatus from the pilot pile installations, the in-situ tests (CPT, SPT) were carried out at the ground adjacent to the noise- and vibration-free screw concrete piles installed by 2 kinds of construction methods (i.e., the toe-jetting shoe type, the pre-digging type). In the toe-jetting shoe type construction methods, after construction, the soil strength within 3.5D (where, D = pile diameter) from the pile center decreased greatly by about 46% of the original ground and, after an 11-month hiatus, a strength recovery adjacent to the piles appeared about 71% of the original ground. In the pre-digging type construction methods, a strength recovery adjacent to the piles appeared 100% of the strength of the original ground.

Keywords
CPT
SPT
Noise and vibration-free
A screw concrete pile
Constructon methods
The toe-jetting shoe type
The pre-digging type
The strength recovery

2가지 시공법(즉 선단분출형슈방식, 선행굴착방식)으로 시공한 무소음･무진동을 위한 스크류콘크리트말뚝의 인접 지반에서 시공 전･후 및 11개월 경과 시 원위치시험(CPT, SPT)을 실시하였다. 선단분출형슈방식 시공법의 경우 시공 직후 말뚝 중심∼3.5D(여기서 D : 말뚝직경)의 영역에 있는 지반의 강도는 원지반 강도의 46%정도로 크게 감소하였으며 시공 후 약 11개월 경과 시 말뚝 인접 지반의 강도회복은 원 지반 강도의 71%정도로 나타났다. 선행굴착방식 시공법의 경우 11개월 경과 시 말뚝 인접 지반의 강도는 원지반의 전단강도까지 회복되는 것으로 나타났다.

References
1
1.Bottiau, M. (2006), Recent Evaluations in Deep Foundation Technologies, Proceedings of 10th Int. Conf. on Piling and Deep Foundation, Amsterdam, 2006, pp.46-83.
2
2.Choi, Y., Kim, D. C., Kim, S. S., and Nam, M. S. (2010), A Study on the Determination of Construction Method of a Noise & Vibration-Free Screw Concrete Pile, Journal of the Korean Geo-environmental Society, 2010, Vol.11, No.7, pp.15-24.
3
3.Jo, C. H. (2010), “Piling Engineering Practice”, ENG, p.36.
4
4.Kim, D. C. (2011), A Study on the Construction Method and Behavior of Axial Resistances of a Noise and Vibration-Free Screw Concrete Pile Method, Graduate School of Civil and Environmental Engineering, Kyungsung University, Ph. D. dissertation, pp.56-82.
5
5.Van Impe, W. F. (1988), “Considerations on auger pile design”, Proc. of 1st Int. Conference on Deep Foundations on Bored and Auger Piles, Ghent, Balkma, pp.193-218.
Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 29
  • No :1
  • Pages :71-80
  • Received Date : 2012-09-04
  • Accepted Date : 2012-11-28
  • DOI :https://doi.org/10.7843/kgs.2013.29.1.71
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