Nonlinear analytical method for load-settlement behavior of pile group composed of new and old piles in clay

被引：0
|
作者：
Li J. [1 ]
Zhang L. [2 ]
Xiao J. [3 ]
Li L. [1 ]
机构：
[1] Department of Geotechnical Engineering, Tongji University, Shanghai
[2] Shanghai Municipal Engineering Design Institute, Shanghai
[3] Department of Building Engineering, Tongji University, Shanghai
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2019年 / 40卷 / 12期
关键词：
Load-settlement relationship; New and old mixed pile groups; Nonlinear analytical method; Shielding effect;
D O I：
10.14006/j.jzjgxb.2017.0617
中图分类号：
学科分类号：
摘要：
Compared with the old piles, the bearing behaviour of new piles is significantly different due to the pile-jacking influence in natural saturated clay. Accordingly, there are obvious differences in the bearing behaviour and load-settlement relationship between traditional pile groups and pile groups composed of new and old piles. The computation method of settlement of single new pile and single old pile was completed according to the mechanic properties of the saturated clay around it. On this basis, considering the effect of soil layering, the nonlinearity of pile-soil interaction and the shielding effect, a nonlinear analytical method for the load-settlement relationship of pile groups composed of new and old piles in saturated clay was proposed in this paper. Then, the theoretical solution was verified by engineering examples, and the bearing behaviour and load-settlement relationship of pile groups composed of new and old piles with different configurations were subsequently analyzed in detail. The results show that proposed method can properly predict the settlement of the pile group composed of new and old piles in saturated clay, and can be used as a reference for the design of pile group composed of new and old piles in practical engineering. © 2019, Editorial Office of Journal of Building Structures. All right reserved.
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页码：113 / 118
页数：5
相关论文
共 18 条
  • [1] Xiao J., Introduction to Sustainable Concrete Structure, (2017)
  • [2] Yao J., Study on construction control technology for new static pressure piles under condition of recycled existing piles and new-old mixed piles, Building Construction, 38, 4, pp. 402-405, (2016)
  • [3] Carter J.P., Randolph M.F., Wroth C.P., Stress and pore pressure changes in clay during and after the expansion of a cylindrical cavity, International Journal for Numerical and Analytical Methods in Geomechanics, 3, 4, pp. 305-322, (1979)
  • [4] Randolph M.F., Science and empiricism in pile foundation design, Géotechnique, 53, 10, pp. 847-875, (2003)
  • [5] Bullock P.J., Determining the effect of stage testing on the dimensionless pile side shear setup factor, pp. 67-72, (2005)
  • [6] Axelsson G., Long-term set-up of driven piles in sand, pp. 22-34, (2000)
  • [7] Alawneh A.S., Nusier O.K., Awamleh M., Time dependent capacity increase for driven piles in cohesionless soil, Jordan Journal of Civil Engineering, 3, 1, pp. 1-31, (2009)
  • [8] Tavenas F., Audy R., Limitations of the driving formulas for predicting the bearing capacities of piles in Sand, Canadian Geotechnical Journal, 9, 1, pp. 47-62, (1972)
  • [9] Long J.H., Kerrigan J.A., Wysockey M.H., Measured time effects for axial capacity of driven piling, Journal of the Transportation Research Board, 1663, 1, pp. 8-15, (1999)
  • [10] Li L., Li J.P., Sun D.A., Anisotropically elasto-plastic solution to undrained cylindrical cavity expansion in K<sub>0</sub>-consolidated clay, Computers and Geotechnics, 73, pp. 83-90, (2016)
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