Design and implementation of CFA piles for a power plant in Coronel, Chile
DOI:
https://doi.org/10.4067/S0718-28132014000100001Keywords:
CFA pile, continuous flight auger, pile capacity, friction pileAbstract
The purpose of this study is to present the CFA piles system (Continuous Flight Auger) and to show a case of application for a power station project in Coronel, Chile. The main advantage of this method is the fast execution of the piles, which results in higher yields and lower costs. Even though this technology is popular in other countries and there are favourable soil conditions for its implementation in Chile, this method is not yet commonly used in the country. This paper describes the method's strengths and weaknesses, the favourable and unfavourable geotechnical conditions for its development, and the equipment, materials, and procedures necessary for its implementation. The paper also shows the procedure for estimating the axial capacity of piles in soils where the execution of the method is more common. Finally, an applied case in the Bío Bío Region is presented, following the methods of international regulations and recommendations previously described for the estimation of axial capacity on piles.
References
Bauer (2011). BG 50: Rotary Drilling Ring. Retrieved from: http://www.bauer.de/en/bma/products/drilling_rigs/premium_line/bg50_bt180.html
Brown, D. A., Dapp, S. D., Thompson, W. R. and Lazarte, C. A. (2007). Design and Construction of Continuous Flight Auger (CFA) Piles. Geotechnical Engineering Circular No. 8. FHWA, Washington DC.
Candogan, A. (2009). The Art and Practice of Foundation Engineering. Ali Candogan, Estambul.
Coduto, D. P., Yeung M.R. and Kitch, W. A. (2011). Geotechnical Engineering: Principles and Practices. Pearson Education, New York.
DIN (1990). DIN 4014: Bored cast-in-place piles: formation, design and bearing capacity. Germany.
INN (2006). NCh 204 Of. 2006: Acero- Barras laminadas en caliente para hormigón armado. Instituto Nacional de Normalización, Santiago
Kempfert, H., Dieter, K. and Smoltczyk, U. (2003). Pile foundations. In U. Smoltczyk, Geotechnical Engineering Handbook Volume 3: Elements and Structures (pp. 83-227). Ernst & Sohn, Berlin.
O'Neill, M. W. and Reese, L. C. (1999). Drilled Shafts: Construction Procedures and Design Methods. Report No. FHWA-IF-99-025. Federal Highway Administration, Washington DC.
Pilotes Terratest (2009). Pilotes de Hélice Continua - CFA. Retrieved from: http://www.terratest.cl/documentos/CAT-CFA-01-rev%202.pdf
Reese, L. C. and O'Neill, M. W. (1989). New design method for drilled shafts from common soil and rock tests. Proceedings of Foundation Engineering: current principles and practices. ASCE Vol. 2, 1026-1039.
Stocker, M. and Waltz, B. (2003). Bored pile walls, diaphragm walls, cut-off walls. In U. Smoltczyk, Geotechnical Engineering Handbook Volume 3: Elements and Structures (pp. 409-450). Ernst & Sohn, Berlin.
Terzaghi, K., Peck, R. B. and Mesri, G. (1996). Soil Mechanics in Engineering Practice. John Wiley & Sons, New York.
Tomlinson, M. and Woodward, J. (2007). Pile Design and Construction Practice. Taylor & Francis, New York.
Downloads
Published
Issue
Section
License
Copyright (c) 2014 Universidad Católica de la Santísima Concepción
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
