1. School of Civil Engineering, Southeast University, Nanjing Jiangsu 210096, China;
2. Key Laboratory for RC and PRC Structures of Education Ministry, Southeast University, Nanjing Jiangsu 210096, China
Review of Computational Models and Methods for Predicting Ultimate Capacity of Uplift Piles with Uniform Cross Section
HE Hong-nan1, DAI Guo-liang1,2, GONG Wei-ming1,2
1. School of Civil Engineering, Southeast University, Nanjing Jiangsu 210096, China;
2. Key Laboratory for RC and PRC Structures of Education Ministry, Southeast University, Nanjing Jiangsu 210096, China
摘要To improve the application of uplift piles, the calculation method for ultimate bearing capacity is analyzed to study the significant difference between the calculation and test values of bearing capacity. The computational methods for the ultimate capacity of uplift piles are analyzed on the basis of three failure surfaces. A comparative analysis of the results is performed on the basis of the field test. Results show that (1) the standard, Meyerhof and Das methods ignore the self-weight of pile, thus making the calculation value smaller than the test value, such that these methods can be applied only to uplift piles with small length-diameter ratio; (2) the Chattopadhyay method can predict the bearing capacity of sand, but the process is complicated; (3) the Shanker method considers the value of embedded length-diameter ratio and can therefore be used to predict the bearing capacity when the ratio is larger than 20; and (4) the truncated inverted cone considers the self-weight of pile, the Kotter method is based on the Kotter equation, and the horizontal slice method assumes that the failure surface is curved, and all three methods base their calculation of bearing capacity on ultimate equilibrium theory. The values from the three methods are close to that of Vesic test, such that these approaches can be used to compute for the ultimate capacity of uplift pile with uniform cross section under different soil conditions.
Abstract：To improve the application of uplift piles, the calculation method for ultimate bearing capacity is analyzed to study the significant difference between the calculation and test values of bearing capacity. The computational methods for the ultimate capacity of uplift piles are analyzed on the basis of three failure surfaces. A comparative analysis of the results is performed on the basis of the field test. Results show that (1) the standard, Meyerhof and Das methods ignore the self-weight of pile, thus making the calculation value smaller than the test value, such that these methods can be applied only to uplift piles with small length-diameter ratio; (2) the Chattopadhyay method can predict the bearing capacity of sand, but the process is complicated; (3) the Shanker method considers the value of embedded length-diameter ratio and can therefore be used to predict the bearing capacity when the ratio is larger than 20; and (4) the truncated inverted cone considers the self-weight of pile, the Kotter method is based on the Kotter equation, and the horizontal slice method assumes that the failure surface is curved, and all three methods base their calculation of bearing capacity on ultimate equilibrium theory. The values from the three methods are close to that of Vesic test, such that these approaches can be used to compute for the ultimate capacity of uplift pile with uniform cross section under different soil conditions.
基金资助:Supported by the National Basic Research Program of China (No.2013CB036304);the Road and Transport R&D Project for Western Regions of China Commissioned by Ministry of Transport (No.2013319759060)
通讯作者:
HE Hong-nan, E-mail:hehongnan@126.com
E-mail: hehongnan@126.com
引用本文:
何泓男, 戴国亮, 龚维明. 等截面抗拔桩的极限承载力计算综述[J]. Journal of Highway and Transportation Research and Development, 2015, 9(2): 69-76.
HE Hong-nan, DAI Guo-liang, GONG Wei-ming. Review of Computational Models and Methods for Predicting Ultimate Capacity of Uplift Piles with Uniform Cross Section. Journal of Highway and Transportation Research and Development, 2015, 9(2): 69-76.
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2015, Vol. 9 
