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本文是文献[1]的深入研究和发展。文中给出可反映群桩间距影响的砂土地基破坏模式理论判据和承载力系数N_q、N_r的计算式,可考虑桩端为楔形或非光滑的更一般情形。最后根据本文理论编制了可用于IBM-PC微机的计算和绘图软件,绘制了承载力系数与桩距、桩底楔角和基土内摩擦角等关系曲线。利用这些曲线能较方便确定群桩桩端土极限承载力。
This article is an in-depth study and development of the literature [1]. In this paper, the theoretical basis for the failure mode of sand foundations and the calculation formula of the bearing capacity coefficients N_q and N_r are shown, which can reflect the effect of the pile group spacing. The more general cases where the pile ends are wedge-shaped or non-smooth can be considered. Finally, according to the theory of this paper, the calculation and drawing software which can be used for IBM-PC microcomputer is compiled. The curve of the relationship between the bearing capacity coefficient and the pile spacing, the wedge angle at the pile bottom and the internal friction angle of the foundation soil are drawn. Using these curves can be more convenient to determine the ultimate bearing capacity of the group pile pile end soil.