Abstract

Model tests accompanying numerical analyses on the modified suction caissons (MSCs) in saturated marine sand subjected to inclined loading were conducted to investigate the bearing behavior and earth pressure distribution along the embedded depth. Influences of external structure sizes, inclined loading angles and loading point position on the inclined bearing behavior were discussed. Results show that the inclined bearing capacity significantly decreases with increasing the loading angle when the loading point locates at the outer wall of the internal compartment. It can be also found that the passive earth pressure can resist a considerable portion of the inclined load when the loading point is located at the internal compartment wall. The maximum inclined bearing capacity of MSC is obtained when the loading position locates at the internal compartment outer wall of 2 L₁/3-3L₁/4 below the caisson lid under relatively small loading angle. An equation was proposed to determine the optimum loading point position under different loading angles to obtain the maximum inclined bearing capacity.

摘要

对受倾斜加载的饱和海砂中的改良吸力沉箱 (MSC) 进行数值分析的模型试验，以研究沿埋置深度的承载行为和土压力分布。讨论了外部结构尺寸、倾斜加载角度和加载点位置对倾斜轴承性能的影响。结果表明，当加载点位于内部隔间的外壁时，倾斜承载力随着加载角度的增加而显着降低。还可以发现，当加载点位于隔间内壁时，被动土压力可以抵抗相当一部分的倾斜荷载。 L ₁ /3-3 L ₁ /4 在相对较小的加载角度下沉箱盖下方。提出了确定不同加载角度下的最佳加载点位置以获得最大倾斜承载力的公式。