Determination of Grouped Piles’ Effective Length Based on Numerical Analysis Solution
American Journal of Civil Engineering
Volume 7, Issue 6, November 2019, Pages: 152-156
Received: Nov. 3, 2019;
Published: Dec. 26, 2019
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Zhongkun Zhang, College of Architecture Engineering, Binzhou University, Binzhou, China
Linlin Wang, College of Architecture Engineering, Binzhou University, Binzhou, China
Xueyang Xing, College of Architecture Engineering, Binzhou University, Binzhou, China
In recent years, there has been an increasing amount of literature on pile’s effective length. A number of studies have found that the single pile’s effective length could be computed by means of different methods which are unsuitable for grouped piles’ computation. In order to understand how the effective length of piles should be calculated, a series of studies was performed in this paper. On the basis of numerical analysis for grouped piles foundation, the computed results indicate the existence of piles’ effective length. Taking an engineering example as a case, both the finite element analysis and the semi-analytical element analysis are used for analyzing. It is revealed that the influencing factors of grouped piles’ effective length are as follows: the pile-soil modulus ratio, top load distribution area, pile diameter, etc. The grouped piles’ effective length increases gradually with the increasing top load distribution area. Although it is difficult to use an appropriate formula to reflect the influence of various factors on the grouped piles length, different various factors can be considered in the numerical simulation analysis. The influencing factors on the grouped piles’ effective length should be considered synthetically. An example of highway in-situ study makes the grouped piles’ effective length be understood deeply both in theory and practice.
Determination of Grouped Piles’ Effective Length Based on Numerical Analysis Solution, American Journal of Civil Engineering.
Vol. 7, No. 6,
2019, pp. 152-156.
X. Shu, F. Z. Wang, 2001, A simplified method determining the effective length of flexible pile in composite foundation, Industrial Construction, 31 (11), 16-17.
Y. Z. Gu, H. Q. Zhou, 1992, Cement mixing pile bearing capacity and critical pile length, The third National Conference on foundation treatment symposium, Zhejiang University Press, 170~173.
S. X. Chen, 1995, Discussion on load transfer performance of flexible pile, Geotechnical engineer, 3 (3) 16-19.
J. W. Duan, 1993, Numerical analysis of flexible pile composite foundation, Doctorate Thesis of Zhejiang University, Hangzhou, 150 p.
Y. F. Leung, A. Klar, et al., 2010, Theoretical study on pile length optimization of pile groups and piled rafts, Journal of Geotechnical and Geoenvironmental Engineering, 136 (2), 319-330.
Y. Liu, Z. R. Xiao, et al., 2019, Model Test on Influence of Pile Length on Pile Resistance and Bearing Capacity Characteristics, Science Technology and Engineering, 19 (7), 215-219.
W. D. Luo, 1990, Analysis of bearing mechanism of single pile and theoretical deduction of load and settlement curve, Journal of geotechnical engineering, 12 (1), 36-44.
M. F. Randoph, C. P. Wroth, 1978, An Analysis of Deformation of Vertical Loaded Piles, ASCE, 104 (12), 1465-1488.
B. J. Zhang, X. D. Fu, et al., 2014, The application of Mindlin-Geddes method in the calculation of piled foundation settlement, Industrial Construction, 44 (S), 862-865. 887.
T. W. Lai, Yang Y. H., 2007, Study on load transfer mechanism and effective length of super-long pile, Journal of Lanzhou Jiaotong University: Natural Sciences, 26 (6), 16-19.
C. Wang, X. Y. Chen, 2011, Study of effective length of piles based on parabolic frictional resistance, Chinese Journal of Underground Space and Engineering, 7 (3), 509-512. 613.
J. X. Tong, M. L. Yan, et al., 2012, Experimental study of relationship between effective pile length and pile strength for rammed soil cement pile composite foundation, Rock and Soil Mechanics, 33 (S), 30-36.
K. Yang, R. Liang, 2006, Numerical solution for laterally loaded piles in a two-layer soil profile, Journal of Geotechnical and Geoenvironmental Engineering, 132 (11), 1436-1443.
Z. J. Zhou, D. D. Wang, et al., 2015, Determination of large diameter bored pile's effective length based on Mindlin's solution, Journal of Traffic and Transportation Engineering, 2 (6), 422-428.
P. Z. Yang, Y. T. Zhou, W. J. Sun, et al. 2014, Improved algorithm for effective length of deformable pile in compound foundation, Journal of Lanzhou University of Technology, 40 (4), 120-123.
B. Zhou, Q. G. Yang, K. N. Zhang, 2007, Calculation method for effective length of flexible piles for composite foundation with rigid foundation, Journal of Central South University: Natural Sciences, 38 (1), 175-179.
N. Wang, K. H. Wang, W. B. Wu, 2013, Analytical model of vertical vibrations in piles for different tip boundary conditions: parametric study and applications, Journal of Zhejiang University: Science A, 14 (2), 79-93.
C. Q. Wang, M. Y. Jia, 2001, Determining the valid length of friction pile from P–S curve, Journal of Xi'an University of Science & Technology, 21 (1), 24-26.