摘要
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 paper is in-depth study and development of the Reference[1]. A theoretical criterion for judging the failure mechanism occurring below the base of pile groups is presented and the values of bearing capacity coefficients N_q and N_y which take account of the effect of rough or smooth base, pile spacing and angle of pile tip are obtained by means of an rigid-plastic model in this paper. A set of curves poltted based on values of N_q and N_y which can be used convenienly for determining to end ultimate bearing capacity of pile groupe in practice are also given.
关键词
群桩
桩距
承载力系数
砂土
pile groups
end ultimate bearing capacity
pile spacing
bearing capacity coefficients
