水平反力系数 - Vesic法
土的水平反力系数由下式计算得到：
其中： | Ep | - | 桩身材料弹性模量 [MPa] |
Ip | - | 桩身截面惯性矩 [m4] | |
Es | - | 岩土体弹性模量 [MPa] | |
d | - | 桩径 [m] | |
ν | - | 泊松比 [-] |
参考文献：
Poulos, H. G. et. Davis, E. H.: Pile Foundations Analysis and Design. New York: John Wiley and Sons, 1980, chapter 8.2.3, pp. 174 (equation 8.43).
Vesic, A. S.: Bending of Beams Resting on Isotropic Elastic Solid. JSMFD, ASCE, vol. 87, 1961, EM 2: pp. 35 – 53.
Vesic, A.S.: Design of Pile Foundations. National Cooperative Highway Research Program Synthesis 42, Transportation Research Board, Washington D.C., 1977.