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通过数值分析软件FLAC3D对坡体布置桩顶有、无连梁品字型抗滑桩进行数值模拟,研究桩排距、桩群中心距对桩顶位移的影响并对有连梁时的桩排距和桩群中心距进行优化设计。研究结果表明:有连梁时的桩顶位移明显比无连梁时的位移小很多。排距小于6m时,随着桩排距的不断增大,抗滑桩桩顶位移不断减小;排距大于6m时,桩顶位移趋于平缓。合理桩排距宜为6~7m。随着桩群中心距的增大,桩顶位移呈现先增大后平稳再增大最后平稳的规律,桩群中心距宜为9m。
The numerical simulation software FLAC3D was used to simulate the displacement of piles on the top of the pile with and without beam. The influence of the distance between piles and the center distance of piles on the pile top displacement was studied. Distance and pile group center distance for optimal design. The results show that the displacement of the top of a pile with a continuous beam is significantly smaller than that of a continuous beam without a beam. When the row spacing is less than 6m, as the distance between pile rows increases, the top displacement of anti-slide pile decreases continuously. When the row distance is more than 6m, the pile top displacement tends to be gentle. Reasonable pile spacing should be 6 ~ 7m. With the increase of center distance of pile group, the top displacement of pile top increases first, then increases steadily and finally increases. Finally, the center distance of pile group should be 9m.