考虑初始地应力的海底斜坡稳定性分析

Study on the stability of submarine slopes considering the initial geostress field

基于大型有限元非线性软件ABAQUS,运用有限元强度折减法,将初始地应力的平衡应用到海底斜坡模型的稳定性评价中.选取均质海底斜坡及折线型海底斜坡两种模型进行分析,计算出斜坡的稳定安全系数,并给出了失稳时的塑性区等信息.验证了初始地应力的平衡运用到海底斜坡模型中的可行性;且平衡地应力对斜坡模型的塑性区及稳定安全系数均有一定影响.将初始地应力的平衡运用到海底斜坡的稳定性评价中,为海底斜坡的进一步探索提供了参考.

With the large-scale nonlinear finite element software ABAQUS, the stability of submarine slopes considering the initial geostress field is analyzed by using the strength reduction method in this paper. Two different kinds of submarine slopes are simulated, and the safety factors of homogeneous and polygonal submarine slope are calculated, and the plastic zone is given. The feasibility of using the initial geostress field on the stability of submarine slopes is verified. And it proves that the initial geostress field has an impact on the safety factors and the plastic zone. It can be a reference for the prevention of submarine slopes caused by the initial geostress field.