中文摘要：

采用有限元强度折减法分析岸坡稳定是目前比较前沿的研究成果，该方法在获得抗力分项系数的同时，可以得到岸坡土体的应力、位移场、塑性区以及桩基对岸坡稳定的影响。对国内某突堤码头建立了有限元模型，土体采用与Mohr-Column准则匹配的Drucker-Prager弹塑性准则，首次利用强度折减有限元法分析了在桩基影响下的成层土岸坡稳定问题，并给出了抗力分项系数、塑性区和位移场，从而为高桩码头岸坡的稳定性计算提供参考依据。

英文摘要：

Slope stability problem is always an important subject to the engineers and scholars. In the traditional method, soil is taken as a rigid body. Except safety factor of the slope, neither the stress nor the deformation of the soils can be acquired. It cannot deal with the slope with piles, such as piled wharf slope. Strength reduction finite elements analysis is a hot method for slope stability analysis. This method can not only acquire the safe factor, but also the stress, displacement field and plastic zone of soil. A finite dement model of a piled wharf slope is set up. Drucker-Prager criterion suited to Mohr-Column criterion is used as the yielding criterion of soil. Based on the model, strength reduction finite element method is used to analyze slope stability and the safe factor, plastic zone and displacement field of the slope with layered soils and piles taken into account are achieved for the first time. It helps to provide a reference method to the slope stability calculation.