抗滑桩加固边坡变形破坏特性离心模型试验研究

抗滑桩加固边坡的增强作用与抗滑桩设置位置、桩头条件等密切相关,通过离心模型试验对不同桩位与桩头条件下采用抗滑桩加固边坡的变形破坏特性进行研究。试验表明,设在边坡中部的抗滑桩在边坡破坏前桩头水平位移最大,而在相同的破坏载荷作用下,设在中部的抗滑桩比设在上、下部以及桩头固定比桩头自由时边坡破坏后的位移矢量要小,这表明抗滑桩设边坡中部以及桩头固定对边坡土体的遮挡效果及边坡安全系数的提高最好。

Centrifugal model tests on deformation of slopes reinforced with piles

The improvement of the safety factor of the slopes reinforced with piles closely relates to the pile position and head conditions.A series of centrifugal model tests are employed to study the deformation of slopes reinforced with piles.Some conclusions are drawn from the tests:before the slope failure,the head horizontal displacement of the pile set in the middle of the slope is much larger than that in other positions,and under the same failure load,the displacement vectors of the slope reinforced with the piles set in the middle of the slope are larger than those in the toe and shoulder of the slope.It indicates that the reinforced piles set in the middle position and the fixed pile head are more effective to improve the safety factor of the slope.