Field Tests for Investigating the Extraction Rate of Piles Using a Vibratory Technique

doi:10.1007/s12204-018-1971-4

Abstract

Abstract: Factors directly affecting the extraction rate of the piles pulled out by a vibratory pulling system are summarized and classified into five categories (excitation force, resistance, vibration amplitude, pile plumbness keeping, and slowing down at the later stage) from the mechanics and engineering practice. Field tests on steel sheet piles extracted by vibratory technique in different soil conditions are conducted to ascertain how these factors affect the extraction rate of a pile with regard to three major actors of vibratory pile pulling: the pile to be extracted, the selected pulling system, and the imposed soil conditions. The extraction rates of three different sheet pile types (having up to four different lengths) pulled out by two different vibratory pulling systems are documented. The piles with different lengths and types, pulled out with or without a clutch, have different extraction rates. The working parameters governing the vibratory hammer, such as excitation force and vibration amplitude, exert significant influences on the rate of pile extraction, especially in the early stages of up-lift process. The extraction rate of the piles driven in different soil conditions is uniform because different extraction resistances mainly refer to shaft friction. The properties of the pile-soil interface influence the extraction rate of the piles, and the extraction rate decreases with the time for which the piles have been buried in the earth.

Key words: field tests| steel sheet pile| vibratory pile pulling| extraction rate

摘要： Factors directly affecting the extraction rate of the piles pulled out by a vibratory pulling system are summarized and classified into five categories (excitation force, resistance, vibration amplitude, pile plumbness keeping, and slowing down at the later stage) from the mechanics and engineering practice. Field tests on steel sheet piles extracted by vibratory technique in different soil conditions are conducted to ascertain how these factors affect the extraction rate of a pile with regard to three major actors of vibratory pile pulling: the pile to be extracted, the selected pulling system, and the imposed soil conditions. The extraction rates of three different sheet pile types (having up to four different lengths) pulled out by two different vibratory pulling systems are documented. The piles with different lengths and types, pulled out with or without a clutch, have different extraction rates. The working parameters governing the vibratory hammer, such as excitation force and vibration amplitude, exert significant influences on the rate of pile extraction, especially in the early stages of up-lift process. The extraction rate of the piles driven in different soil conditions is uniform because different extraction resistances mainly refer to shaft friction. The properties of the pile-soil interface influence the extraction rate of the piles, and the extraction rate decreases with the time for which the piles have been buried in the earth.

关键词: field tests| steel sheet pile| vibratory pile pulling| extraction rate

CLC Number:

TU 435

QIN Zhaohui (秦朝辉), CHEN Longzhu (陈龙珠), SONG Chunyu (宋春雨), ZHANG Jingyi (张敬一). Field Tests for Investigating the Extraction Rate of Piles Using a Vibratory Technique[J]. Journal of Shanghai Jiao Tong University (Science), 2018, 23(4): 482-.

References 15

[1]	HOLEYMAN A E. Keynote lecture: Vibratory driving analysis [C]//Proceedings of the 6th International Conference on the Application of Stress-Wave Theory to Piles. Sao Paulo, Brazil: Balkema, 2000: 479-494.
[2]	HOLEYMAN A, MICHIELS L. Vibratory penetration and flow shearing in granular materials: A review of perspectives [C]//Proceedings of the International Conference on Vibratory Pile Driving and Deep Soil Compaction. Pairs, France: LCPC, 2006: 31-52.
[3]	VIKING K. The vibratory pile installation technique [C]//Proceedings of the International Conference on Vibratory Pile Driving and Deep Soil Compaction.Pairs, France: LCPC, 2006: 65-82.
[4]	VIKING K. Vibro-driveability: A field study driven sheet piles in non-cohesive soils [D]. Stockholm, Sweden:Department of Civil and Architectural Engineering,Royal Institute of Technology, 2000.
[5]	WHENHAM V, HUYBRECHTS N, LEGRAND C,et al. Energy consumption during sheet piles vibrodriving:Experimental results [C]//Proceedings of the International Conference on Vibratory Pile Driving and Deep Soil Compaction. Pairs, France: LCPC,2006: 209-218.
[6]	WHENHAM V, AREIAS L, ROCHER-LACOSTE F, et al. Full scale sheet pile vibro-driving tests[C]//Proceedings of the 17th International Conference on Soil Mechanics and Geotechnical Engineering.Alexandria, Egypt: IOS Press, 2009: 1354-1357.
[7]	LEE S H, KIM B II, HAN J T. Prediction of penetration rate of sheet pile installed in sand by vibratory pile driver [J]. KSCE Journal of Civil Engineering, 2012,16(3): 316-324.
[8]	FENG Z Y, DESCHAMPS R J. A study of the factors influencing the penetration and capacity of vibratory driven piles [J]. Soils and Foundations, 2000, 40(3):43-54.
[9]	RODGER A A, LITTLEJOHN G S. A study of vibratory driving in granular soils [J]. Geotechnique, 1980,30(3): 269-293.
[10]	RODGER A A. An experimental and theoretical investigation of the parameters influencing the vibratory penetration of dry cohesionless soils [D]. Aberdeen,Scotland: Department of Engineering, University of Aberdeen, 1976.
[11]	ONEILL M W, VIPULANANDAN C, WONG D. Laboratory modeling of vibro-driven piles [J]. Journal of Geotechnical Engineering, 1990, 116(8): 1190-1209.
[12]	VIPULANANDAN C, WONG D, O’NEILL M W. Behavior of vibro-driven piles in sand [J]. Journal of Geotechnical Engineering, 1990, 116(8): 1211-1230.
[13]	SCHMIDWE. Low frequency pile vibrators [C]// Proceedings of the Conference on Design and Installation of Pile Foundation of Cellular Structures. Bethlehem,USA: Emo Pub, 1970: 257-265.
[14]	DAVISSON M T. BRD vibratory driving formula [J].Foundation Facts, 1970, 1(1): 9-11.
[15]	CHEN D J, CHEN L Z, ZHENG J G. Experimental study on mechanism of piling with high-frequency vibration[J]. Railway Construction Technology, 2006(3):70-73 (in Chinese).