中文摘要：

针对沉箱码头抛石基床滑移破坏的问题，文章借助Plaxis有限元计算软件，应用弹塑性数值模拟模块，采用理想弹塑性本构模型，以江苏盐城市某沉箱码头为计算实例，建立了三维有限元模型计算分析。同时，通过研究发现，抛石基床内部存在着潜在的滑移破坏面，该破坏面的位置与码头结构的高度和宽度后方荷载和土体的参数有关。

英文摘要：

Based on the Plaxis finite element software, the elastic-plastic numerical simulation model and the ideal Drueker-Prager elastoplastic constitutive model is used to simulate the caisson rockfill foundation＇s sliding failure in caisson wharf. Taking a caisson wharf in Yancheng city of Jiangsu province as an example, three-dimensional finite element model calculation analysis was established. At the same time, it is found that there is a potential slip failure surface inside the riprap bed, the position of the failure surface is related to the height and width of the pier structure and the parameters of the soil.