Poulos H G. Settlement of Single Piles in Non-Homogeneous Soil [J]. J Geotech Engng,ASCE,1979(GT5) :627-641.
[2]
Lee C Y ,Poulos H G. Axial Response Analysis of Piles in Vertically and Horizontally Non-Homogeneous Soils[J]. Computer and Geotechnics,1990(9) :133-148.
[3]
Rajapakse R K N D. Response of an Axially Loaded Elastic Pile in a Gibson Soil[J]. Geotechnique,1990,40(2) :237-249.
Randolph M F ,Wroth C P. Analysis of Deformation of Vertically Loaded Piles [J]. Journal of the Geotechnical Engineering Division,1978,104(GT12) : 1465-1488.