倾斜荷载下裙式吸力基础抗拔承载力模型试验研究

Model Tests on The Bearing Capacity of Modified Suction Caisson under Inclined Pullout Loading

开展室内模型试验,研究倾斜荷载作用下裙式吸力基础的承载特性。探讨基础裙结构尺寸、加载角度、加载速度等因素对倾斜荷载作用下裙式吸力基础荷载‑位移关系曲线以及抗拔承载力的影响,研究加载过程中主桶和裙结构内吸力变化规律。试验结果表明:倾斜荷载作用下,裙式吸力基础抗拔承载力随着裙宽和裙高的增大逐渐增大,随着加载速度的增大逐渐增大。另外,随着荷载作用方向与水平方向角度的不断增大,裙式吸力基础抗拔承载力有所降低,主桶和裙内吸力均增大。

In this paper,a model test was conducted to investigate the bearing characteristics of the skirt suction foundation under an inclined load.Through changing the skirt width,skirt height,loading angle and loading speed,the change of bearing capacity of the modified suction caisson base under an inclined load was explored,and the negative pressure in the main barrel and the negative pressure in the modified suction caisson were analyzed.The results show that the bearing capacity of the modified suction caisson base under the effect of inclined load increases with the increase of the skirt width,skirt height and loading speed,and the corresponding base displacement value increases when the ultimate bearing capacity is reached.With the increase of the load angle,the negative pressure in the barrel increases although the basic bearing capacity decreases.