Applicability of Solidified Soil as a Filling Materials in the Drilling of the Bored-precast Pile

Khi-Woong Kim; Jeong-Jun Park; Byung-Kwon Han

doi:10.12814/jkgss.2014.13.2.021

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Applicability of Solidified Soil as a Filling Materials in the Drilling of the Bored-precast Pile 매입말뚝 시공시 현장토를 활용한 고화처리 충전재의 현장 적용성 평가

30 June 2014. pp. 21-29

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Abstract

The use of filling material based on cement paste is inefficient at field construction because it needs a lot of the charging mass. In addition, it has environmental problem according to the large amount of cement use because its strength is also larger than criterion. The excavated soil with stabilizer can be used as the filling materials when the bored pile is constructed. Therefore, this paper describes field application of solidified soil for economical efficiency and environment-friendly. The static axial load tests and the load-transfer measurements were performed to examine the axial resistant behavior of the piles. As results, the flowability, segregation and bleeding, and bond strength of filling materials was a good performance than that of the existing cement paste. But the skin friction of pile by PDA was slightly decreased than that of the existing cement paste. However, as pile filling materials, and in terms of economics and environment, the applicability of filling material is considered very effective.

Keywords

Bored pile

Solidified soil

Filling materials

Skin friction

Load transfer

시멘트 페이스트를 사용한 충전재는 현장 시공 시 실제 주입량이 지나치게 커서 비효율적이며, 설계기준에 비해 과도한 강도를 발현하여 시멘트 사용에 따른 환경성 문제를 지니고 있다. 이에 대한 대안으로 기존의 시멘트 페이스트를 대체함과 동시에 경제성과 환경성을 고려하여 현장에서 발생되는 현장토를 충전재로 재활용한 고화처리 충전재의 현장 적용성을 평가하였다. 또한, 현장 재하시험 및 하중전이 계측을 수행하여 말뚝의 축방향 지지거동을 분석하였다. 그 결과 고화처리 충전재는 기존 시멘트 페이스트에 비해 유동성과 재료분리저항성 및 부착강도에서는 좋은 성능을 발휘하였고, 동재하시험에 의한 주면마찰력은 다소 떨어졌으나 수평지지력 및 인발력 등은 유사하였고, 설계지지력 이상 도출되어 기준에 부합된 결과를 나타내었다.

References

1.ASTM Standards C940-98a (2003), Standard Test Method for Expansion and Bleeding of Feshly Mixed Grouts for Preplaced-Aggregate Concrete in the Laboratory, ASTM International, West Conshohocken.

2.ASTM Standards D6103 (2004), Standard Test Method for Flow Consisteny of Controlled Low Strength Material (CLSM), ASTM International.West Conshohocken.

3.Choi, H.B., Noh, C.S., Han, B.K., Lee, H.G. (2011), “Estimation of field application for the PHC pile backfill recycling in-site soil”, 2011 Spring The Korea Institute of Building Construction Conference, Vol. 11, No. 1, pp. 63-66. (in Korean)

4.Das B. M. (2009), Principle of Foundation Engineering, 6th edition, Thomson.

5.EXT (2012), A Study of the minimization of waste and recycling of the in-site soil in the drilling of the bored-precast pile, Korea Agency for Infrastructure Technology Advancement. (in Korean)

6.FHWA (1998), Design and Construction of Driven Pile Foundations-Workshop Manual Volume Ⅱ, Federal Highway Administration, Mclean, VA, pp.1-19.

7.Kim, B.I., Wee, S.H., Lee, S.H., Kim, Y.U. (2003), “Strength characteristics of soil-cement mixed with inorganic solidification liquid”, Korea Society of Civil Engineers, 23(3C), pp. 135-141. (in Korean)

8.Kim, K.W., Chai, J.G., and Han, B.K. (2012), “Applicability of solidified Soil as a Filling Materials of Bored Pile”, Journal of Korean Geosynthetics Society, Vol. 11, No. 3, pp. 37-42. (in Korean)

9.Korea Land & Housing Coporation (2010), LH Construction Specifications 30535. (in Korean)

10.KS F 2405 (2010), Standard Test Method for Compressive Strength of Concrete, Korean Agency for Technology and Standards. (in Korean)

11.Oh, S.H. (2011), Evaluation of Field Application of Surface Reinforcement Method using Stabilized Soil and Rotary , M.S. thesis, Univ. of Incheon. (in Korean)

12.Park, J. B. (2004), “Strength and Friction Behavior of Cement paste poured in the Bored Pile”, Journal of the Korean Geo-environmental society, Vol.5, No.3, pp.31-39. (in Korean)

13.Park, J. H., Lee, K.H., Jo, J.H.., Kim, S.N. (2004), “Deformation characteristics of underground pipe with in-site soil CLSM”, Journal of Korea Geotechnical Society, 20(3), pp.129-139. (in Korean)

Information

Publisher :Korean Geosythetics Society
Publisher(Ko) :한국지반신소재학회
Journal Title :Journal of the Korean Geosynthetics Society
Journal Title(Ko) :한국지반신소재학회 논문집
Volume : 13
No :2
Pages :21-29
Received Date : 2014-05-12
Revised Date : 2014-06-05
Accepted Date : 2014-06-07
DOI :https://doi.org/10.12814/jkgss.2014.13.2.021

Journal of the Korean Geosynthetics Society ISSN:2508-2876(Print) 2287-9528(Online) 한국지반신소재학회 논문집

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