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http://dx.doi.org/10.7843/kgs.2013.29.3.51

Estimation of Slime Thickness of Bored Piles by Using Borehole Electrical Resistivity Method  

Chun, Ok-Hyun (School of Civil, Environmental, and Architectural Engineering, Korea University)
Lee, Jong-Sub (School of Civil, Environmental, and Architectural Engineering, Korea University)
Park, Min-Chul (Geotechnical Engineering Team, Backyoung)
Bae, Sung-Gyu (Department of Environment and Construction Management, Korea Air Line Co., Ltd.)
Yoon, Hyung-Koo (Department of Geotechnical Disaster Prevention Engineering, Daejeon University)
Publication Information
Journal of the Korean Geotechnical Society / v.29, no.3, 2013 , pp. 51-60 More about this Journal
Abstract
The slime, deposited in the bored pile due to falling soil particle, reduces the bearing capacity of bored pile and thus the stability of construction also decreases. The weight pendulum and iron have been used for estimating the slime thickness based on the subjective judgment and thus the previous method has a limitation of reliability. The objective of this paper is to suggest the method for estimating the slime thickness by using characteristics of electrical resistivity as scientific method. The temperature-compensation resistivity probe (TRP), which has a conical shape and the diameter of 35.7mm, is applied to the measurement of the electrical resistivity in the borehole during penetration. The field tests are carried out for estimating the slime thickness in the application site of bored pile. The slime thickness is calculated through the difference between excavation depth of borehole and measured data. Furthermore, the laboratory tests are also conducted for investigating effects of casing, time elapsing and relative density by using the specimen of slime. The laboratory test supporting the suggested method is reasonable for determining the slime depth. The paper suggests that the electrical resistivity method may be a useful method for detecting slime thickness and the method is expected to be applicable to various sites of bored piles.
Keywords
Bored pile; Electrical resistivity; Field test; Slime; Temperature-compensation Resistivity cone Probe(TRP);
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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1 Abu-Hassanein, Z. S., Benson, C. H., and Boltz, L. R. (1996), "Electrical resistivity of compacted clays", Journal of Geotechnical Engineering (ASCE), Vol.122, No.5, pp.397-406.   DOI
2 Campanella, R. G. and Weemees, I. (1990), "Development and use of an electrical resistivity cone for groundwater contamination studies", Candian Geotehnical Journal, Vol.27, No.5, pp. 557-567.   DOI
3 Cho, C. W. (2010), Piling engineering practice, ENG book, Seoul, pp.414.
4 Cho, G. C., Lee, J. S., and Santamarina, J. C. (2004), "Spatial variability in soils: high resolution assessment with electrical needle probe", Journal of Geotechnical and Geoenvironmental Engineering (ASCE), Vol.130, No.8, pp.843-850.   DOI   ScienceOn
5 Gue, S. S., Tan Y. C., and Liew, S. S. (2003), "A brief guide to design of bored piles under axial compression - a Malaysian approach", Seminar and Exhibition on Bridge Engineering, Kulala Lumpur, Malaysia, pp.8-22.
6 Jung, S. H., Yoon, H. K., and Lee, J. S. (2011), "Application of temperature-compensated resistivity probe in the field", Journal of the Korean Society of Civil Engineers (KSCE), Vol.31, No.4, pp.117-125.
7 Kim, J. H., Yoon, H. K., and Lee, J. S. (2011a), "Void Ratio Estimation of Soft Soils using Electrical Resistivity Cone Probe", Journal of Geotechnical and Geoenvironmental Engineering (ASCE), Vol.137, No.1, pp.86-93.   DOI   ScienceOn
8 Kim, J. H., Yoon, H. K., Cho, S. H., Kim, Y. S., and Lee, J. S. (2011b), "Four Electrode Resistivity Probe for Porosity Evaluation", Geotechnical Testing Journal (ASTM), Vol.34, No.6, pp.668-675.
9 Korean Geotechnical Society (2002), Deep foundation, Gumi book, Seoul, pp.268-361.
10 Kwon, T. H. and Cho, G. C. (2005), "Smart geophysical characterization of particulate materials in a laboratory", Smart Structures and Systems, Vol.1, No.2, pp.217-233.   DOI   ScienceOn
11 Light, T. S. (1984), "Temperature dependence and measurement of resistivity of pure water", American Chemical Society, Vol.56, No.7, pp.1138-1142.
12 Na, K., Park, B. G., and Cho, K. H. (2009), "A study on application of new borehole video profiling measurement system for drilled shafts", Fall Conference Proceedings on Korean Society for Railway, Jeju, Korea, pp.2493-2503.
13 Poulos, H. G. (2005), "Pile behavior-consequences of geological and construction imperfections", Journal of Geotechnical and Geoenvironmental Engineering (ASCE), Vol.131, No.5, pp.38-568.
14 Shin, C. K., Baek, S. K., and Park, Y. B. (2005), "A removal method of drilled shaft slime using a wire brush", Conference of the Korean Society of Civil Engineers, Jeju, Korea, pp.4312-4315.
15 Yoon, H. K., and Lee, J. S. (2010), "Field velocity resistivity probe for estimating stiffness and void ratio", Soil Dynamics and Earthquake Engineering, Vol.30, No.12, pp.1540-1549.   DOI   ScienceOn
16 Yoon, H. K., Jung, S. H., and Lee, J. S. (2011), "Characterization of Subsurface Spatial Variability by Cone Resistivity Penetrometer", Soil Dynamics and Earthquake Engineering, Vol.31, No.7, pp.1064-1071.   DOI   ScienceOn