中文摘要：

海底斜坡稳定性受风暴潮、海底地震等诸多不确定因素影响,易发生失稳破坏,产生较大的海洋地质灾害。简要介绍海底斜坡稳定性分析方法,建立曹妃甸深槽典型斜坡计算模型,确定了模型计算的海底地形参数、地层结构参数、土体物理力学参数等指标,利用GEO-SLOPE斜坡分析软件进行海底斜坡稳定性定量计算,分析了工程建设前自然状态下以及在大规模工程建设后海底斜坡稳定性,并模拟分析了在大风浪和地震等极端条件下斜坡的稳定性,确定了海底斜坡失稳空间特征。首次采用数值计算对曹妃甸海底斜坡稳定性进行定量分析评价,可以为类似近海建设工程提供重要的参考作用。

英文摘要：

The submarine slope in stability due to many uncertain factors,such as storm surge and undersea earthquake,may produce large marine geological disasters. This paper briefly introduces the submarine slope stability analysis method. To build up the computer mode of Caofeidian typical deep trough slope,the model calculation parameters are determined,such as submarine topography parameters,formation structure parameters,soil strength parameters and so on. Using GEO-SLOPE analysis software for submarine slope stability quantitative calculation,the submarine slope stability in natural state before and after large-scale engineering construction is analyzed,and simulation is made of the slope stability under extreme conditions,such as large waves and earthquakes,to determine the spatial characteristics of submarine slope instability. In this paper,by using numerical simulation technology for the first time,the quantitative calculation of Caofeidian submarine slope stability is made,and the results can also be used for the design of other similar coastal projects.