考虑了多种复杂因素,利用有限元法,在弹塑性理论基础上建立了桩和土的受力和变形的计算模型并编制了电算程序,可模拟算出桩的P-S曲线。通过对40余根桩的计算,主要做了以下工作:①研究桩端拱高f与扩大端直径D之比对垂直承载力的影响;②研究不同的桩身直径d,D和桩长H对垂直承载力的影响。获得了一些有益的结论。 Considering a variety of complex factors, using finite element method, based on the elasto-plastic theory, a calculation model for the force and deformation of piles and soils was established and a computer program was programmed to calculate the P-S curve of the piles. Through the calculation of more than 40 piles, the following work has mainly been done: 1 Study the influence of the ratio of the height f of the pile tip and the diameter D of the enlarged end on the vertical bearing capacity; 2 Study the different pile diameters d, D and the pile length H The effect on vertical bearing capacity. Obtained some useful conclusions.