中文摘要：

考虑坡面以下一定深度范围内地基抗力非线性分布模式，建立了基桩稳定性分析简化计算模型及桩一坡体系总势能方程．据此导得了斜坡段桩柱式桥梁基桩临界荷载与计算长度的能量法解答，并通过平地和斜坡两种不同情况下的室内模型试验验证理论计算方法的合理性．由此进行的参数分析表明：增大墩柱弹性模量或减小墩柱高度（高长比）均可提高基桩稳定性，当高长比取0．3-0．4时，基桩稳定性最佳；当边坡坡度在25°-35°范围内时，基桩稳定性受斜坡效应的影响较小，设计时应尽量将基桩设置在坡度小于35°的边坡上．斜坡段地基抗力比例系数m与坡度α之间的相互影响关系尚有待深入研究．

英文摘要：

The soil resistance is a nonlinear function varying with depth, and it is related to the effect of location in slopes. The simplified model for a pile-column bridge pile and the total potential energy equation of pile-slope system were presented by considering the slope effect. The analytical solution of the critical load and calculated length were derived based on the energy method. In this respect, verification between the measurement and theoretical solution was conducted by dissimilar conditions in plain and slope. The parametric study shows, the increase of the Youngs modulus of the pier column or decrease of its free length enhances the stability of the pile foundation; the appointed elastic modulus of pier column corre- sponds to an optimal column-height, and the best stability is achieved while the ratio is in the range of 0.3 to 0.4. Moreover, a key conclusion from observations is that the bridge pile should be located at the slope with the gradient less than 35° for safety. However, the correlation between rn and α is of significance so that it needs to be further investigated.