水平荷载作用下桶式基础结构稳定性研究

桶式基础防波堤结构应用于深厚软土沿海工程中的实例越来越多，但单桶多隔舱桶式基础结构的稳定性问题尚未得到解决。通过物理模型试验和数值模拟相结合的方法，探讨了桶式基础防波堤的稳定性问题，通过物理模型试验验证数值模型中的土体参数，再通过数值模型研究土体参数对结构承载力和位移的影响规律，以及结构埋深对结构承载力和位移的影响规律；数值模型的计算结果表明，淤泥的弹性模量对位移起到控制作用，特别是对低弹性模量的土体，影响更为敏感；对于承载力，淤泥摩擦角和黏聚力都有着显著影响，增大摩擦角和黏聚力对结构承载力的提高有显著作用。通过变化桶式基础的埋深，发现桶式基础底面达到承载力高的土层表面，对提高承载力有显著效果。研究成果可为工程设计和优化提供参考。

Stability Study of Bucket-based Structure on Horizontal Loading

Bucket-based breakwater structure is used in many engineering practice for the coastal engineering of deep soft soil, but the stability of multi-compartment single-bucket structure has not yet been distinct. In this paper, the stability of Bucket-based breakwater structure is investigated using by physical model tests and numerical simulation method. Soil parameters in numerical model are verified by physical model tests, and then through the numerical model study the influence law of soil parameters to bearing capacity and the displacement of the structure, and the influence law of structure buried depth to bearing capacity and the displacement of the structure. Numerical model results show the law of soil elastic modulus for displacement to play a controlling role is obtained; especially it is the more sensitive for low modulus elasticity soil. The soil friction angle and cohesion have a significant effect for bearing capacity, increasing the friction angle and cohesion to significantly improve the bearing capacity of the structure. It found that the bottom of the structure to reach the soil surface high bearing capacity can significantly improve the bearing capacity by varying the structure buried depth. The research results are referenced for engineering structure design and optimization.