吸力式桶型基础水平静力加载试验承载特性与稳定性分析

Analysis of Bearing Capacity and Stability of Horizontal Static Loading Model for Suction Bucket Foundation

吸力式桶形基础由于其经济、可重复利用、安装方便、适用性强等特点被广泛利用于海上风电基础.本文通过饱和细砂土中吸力式桶型基础水平加载试验,运用无量纲化的分析方法对试验结果进行分析,探究了不同长径比对吸力式桶形基础的水平承载特性的影响,发现随着基础长径比的增大,其水平承载力与桶顶极限位移量均增大;分析了基础桶壁受力前后侧土压力随深度以及水平荷载的分布规律;利用位移分析法和土压力分析法计算转动点位置,对比发现两种计算方法得到的基础转动点位置均位于0.6~0.9倍的桶高之间;揭示了加载过程中基础转动点位置随长径比增大向上移动的变化规律.

Due to the economy, reusability, easy installation, wide applicability and other characteristics, thesuction bucket foundations are widely used as offshore wind power bases. In this study, the horizontal loadingtest of the suction bucket foundation in saturated sandy soil is carried out. We obtained the effects of differentaspect ratio on the horizontal bearing capacity of the suction bucket foundation by dimensionless analysis. It isfound that with the increase of the aspect ratio of the bucket, the horizontal bearing capacity and the limit displacement of the bucket are increased. In addition, we analyze soil pressure on the front and rear side of thebucket with depth and horizontal load. We also found that the bucket rotation point position is located between 0.6 and 0.9 times the bucket height by using the displacement analysis method and the soil pressure analysis method; and as the aspect ratio increases, the rotation point position moves upwards.