Browse > Article
http://dx.doi.org/10.12814/jkgss.2019.18.4.167

Applicability of Bearing Capacity for Single Drilled Shaft Using Empirical equation based on Ground Condition  

Kim, Daehyeon (Department of Civil Engineering, Chosun Univ.)
Jeong, Sangguk (Department of Disaster Prevention Safety Civil Engineering, Songwon Univ.)
Publication Information
Journal of the Korean Geosynthetics Society / v.18, no.4, 2019 , pp. 167-180 More about this Journal
Abstract
Friction piles are being constructed in Southeast Asia (Myanmar, Cambodia, Vietnam, etc.) where the soft ground is deep, and many cases of friction piles are accumulated in terms of experience. In this study, we used the results of four static load test and load transfer test conducted in Myanmar sites to analyze the skin friction of soil layer. In addition, we proposed a relationship chart with skin friction measured in the N-value of Standard Penetration Test (SPT) and the load transfer test result of the single drilled shaft. In the case of Myanmar sites, the range of soil layers was deeper than domestic sites, so the conventional formula of skin friction using the N-value of SPT is different from domestic sites. In sandy layer, fs = 0.096 N in Myanmar sites showed a similar result of the domestic fs = 0.106 N. In clayey layer, fs = 0.315 N, in Myanmar sites showed about 5.0 times higher than the domestic fs = 0.062 N. The results of this study are based on limited data. Therefore, if we analyze the results of more load transfer tests, we can suggest a conventional formula for skin friction according to the N-value. It is expected to be used as important basic data in the future.
Keywords
Friction pile; Soft ground; N-value; SPT; Load transfer test;
Citations & Related Records
Times Cited By KSCI : 8  (Citation Analysis)
연도 인용수 순위
1 Choi, Y. K., Lee, W. J., Lee, C. U. and Kwon, O. K. (2019), "Study(I) on Development of Charts and Formulae Predicting Allowable Axial Bearing Capacity for Prebored PHC Pile Socketed into Weathered Rock through Sandy Soil Layer", Journal of The Korean Geotechnical Society, Vol.35, No.8, pp.17-30.   DOI
2 Hansen, B. (1957), "Earth Pressure Calculation", Danish Technical Press, Copenhagen, Denmark.
3 Hong, S. T., Lee, J. I., Shin, Y. W. and Lee, S. H. (2011), "A Study on Skin Friction Estimation of Drilled Shaft Socketed in Weathered Granite by IGM's Theory", Journal of Korean Society of Civil Engineering, Vol.31, No.6, pp.241-250.
4 Hsiung, Y. M. (2003), "Theoretical Elastic-Plastic Solution for Laterally Loaded Piles", Journal of Geotechnical and Geo-environmental Engineering, Vol.129, No.5, pp.475-480.   DOI
5 Kim, D. H. (2013), Evaluation of Bearing Capacity of Drilled Shaft Socketed in Domestic Layers, Inje University, Master Thesis.
6 Kim, S. I., Jeong, S. S. and Jung, S. Y. (1994), "A Simplified Method for the Calculation of Skin Friction on Piles in Soft Clay", Journal of Korean Society of Civil Engineering, Vol.14, No.1, pp.171-178.
7 Kwon, O. K. (2015), "Bearing Behavior Characteristics of Pressure Penetrating Steel Pipe Pile Under Compression Load", Journal of Korean Geo-Environmental Society, Vol.16, No.7, pp.5-13.   DOI
8 Lee, J. H. (2018), Analysis of Influence Factors on The Bearing Capacity of Drilled Shafts in Cohesionless Soil, Chungang University, Master Thesis.
9 Lee, J. S., Jang, Y. C. and Kim, Y. K. (2002), " A Study on the Allowable Bearing Capacity of Pile by Driving Formulas", Journal of Korean Navigation and Port Research, Vol.26, No.1, pp.106-111.   DOI
10 Na, Y. S. and Lee, S. D. (2019), "Experimental Study on the End Bearing Capacity of the Pile in a Group Pile", Journal of The Korean Geotechnical Society, Vol.35, No.6, pp.27-38.   DOI
11 Lee, S. J. (2013), "Analysis of Diameter Effects on Skin Friction of Drilled Shaft in Sand", Journal of The Korean Geotechnical Society, Vol.29, No.1, pp.161-170.   DOI
12 Osterberg, J. O. (1998), "The Osterberg Load Test Method for Bored and Driven Piles The First Ten Years", Proceedings of the 7th International Conference on Piling and Deep Foundations, Vienna, Vol.1, No.28, pp.1-11.
13 Kim, S. H., Lee, S. C., Lee, J. H. and Kim, M. H. (2001), "Study on The Behavior of Opened Steel Pipe Pile End-beared at Lower Transported Soil Layer", 仁濟論叢, Vol.16, No.1, pp.641-679.
14 Paik, J. Y., Cho, J. Y., Jeong, S. S. and Hwang, T. J. (2012), "Shaft Group Efficiency of Friction Pile Groups in Deeps Soft Clay", Journal of Korean Society of Civil Engineering, Vol.32, No.2, pp.49-60.
15 Park, J. B. (2017), "A Comparative Study on the Bearing Capacity of Dynamic Load Test and Static Load Test of PHC Bored Pile", Journal of Korean Geo-Environmental Society, Vol.18, No.9, pp.19-31.
16 Park, J. S., Park, D. H., Jee, S. H. and Kim, D. J. (2015), "Evaluation of Vertical Bearing Capacity for Bucket and Shallow Foundations Installed in Sand", Journal of Korean Geo-Environmental Society, Vol.16, No.9, pp.33-41.
17 Sagong, M, and Paik, K. H. (2004), "Side Resistance of Rock Socketed Drilled Shafts in Consideration of the Shaft Size Effects", Journal of The Korean Geotechnical Society, Vol.20, No.9, pp.106-115.
18 Park, M. C., Kwon, O. K., Kim, C. M., Yun, D. K. and Choi, Y. G. (2019), "Study(V) on Development of Charts and Equations Predicting Allowable Compressive Bearing Capacity for Prebored PHC Piles Socketed into Weathered Rock through Sandy Soil Layers - Analysis of Results and Data by Parametric Numerical Analysis", Journal of The Korean Geotechnical Society, Vol.35, No.10, pp.47-66.
19 Reese, L. C. (1978), "Analysis of Laterally Loaded Pile in Sand", Proceedings of The VI Annual Offshore Technology Conference, Houston, Texas, (OTC 2080), pp.473-485.
20 Reese, L. C., Cox, W. R. and Koop, F. D. (1975), "Field Testing and Analysis of Laterally Loaded Pile in Stiff Clay", Proceedings of The VII Annual Offshore Technology Conference, Houston, Texas, (OTC 2312), pp.672-690.
21 Seo, Y. J. (2015), Characteristic of Side Resistance through Bi-directional Pile Load Test in Domestic and Foreign Sites, Inje University, Master Thesis.
22 Song, M. J., Park, Y. H. and Kim, M. M. (2013), "Skin Friction and End Bearing Resistances of Rock-socketed Piles Observed in Bi-directional Pile Load Tests", Journal of The Korean Geotechnical Society, Vol.29, No.7, pp.17-36.   DOI
23 Yea, G. G., Yun, D. H., Yun, D. K. and Choi, Y. G. (2019), "Study(II) on Development of Charts and Formulae Predicting Allowable Axial Bearing Capacity for Prebored PHC Pile Socketed into Weathered Rock through Sandy Soil Layer - Improvement Measures of Current Design Method by Analyzing Current Design Data for Prebored PHC Piles", Journal of The Korean Geotechnical Society, Vol.35, No.8, pp.31-42.   DOI
24 Yoon, S. H., Joo, Y. Y., Kim, D. I. and Kim, M. H. (2002), "A Study on the Comparison and Evaluation of Bearing Capacity for the Open-ended Steel Pipe Pile", 仁濟論叢, Vol.17, No.1, pp.597-616.
25 Yoon, M. S., Lee, C. K. and Kim, M. H. (2013), "Evaluation of Unit Side Resistance of Drilled Shafts by Revised SPT N Value", Journal of The Korean Geotechnical Society, Vol.29, No.12, pp.5-10.   DOI