松砂中倾斜锚板上拔承载特性模型试验研究

以福建标准砂为填料，对松砂中倾斜锚板的上拔承载特性进行了试验研究，采用数字图像相关技术分析了上拔时锚周土体的变形特性，重点探讨了锚板倾斜角度(倾角)和埋深比的影响。试验结果表明：对同一倾角，锚板上拔力峰值和所对应的位移水平均随着埋深比的增加而逐渐增大；对同一埋深比，随着锚板倾角的增加，上拔曲线发展形态基本一致，但埋深比的变化会对曲线形态产生影响。在较大埋深比条件下，锚板倾角对上拔承载力的影响具有区间效应，即当倾角约为10°时，上拔极限承载力最小，数字图像分析表明，此现象与不同倾角锚板上拔时竖向和侧向土体抗力的不同发挥机制密切相关。

Model test study on uplift bearing characteristics of inclined anchor plate in loose sand

Model test investigations on the uplift bearing characteristics of the inclined anchor plate in loose sand were carried out with Fujian standard sand as the filler. Sand deformation characteristics around the inclined anchor plate was analyzed by digital image correlation (DIC), and the influences of the inclination angle and buried depth ratio of the anchor plate were discussed. The test results show that under the same inclination angle, with the increase of the buried depth ratio, the peak uplift force and the corresponding displacement level of the anchor plate both increase gradually. Under the same buried depth ratio, with the increase of the inclination angle, the development form of the uplift curve almost stay the same, but the change of the buried depth ratio affects the form of the uplift curve. When the buried depth ratio is large, the influence of the inclination angle on the uplift bearing capacity has interval effect, i.e. when the inclination angle is around 10°, the uplift bearing capacity is the smallest. According to the digital image analyses of the soil deformation, this phenomenon is closely related to the different functional mechanisms of vertical and lateral soil resistances when the anchor plates with different inclination angles are pulled out.