其竖向荷载主要依靠桩侧摩阻力进行传递，桩侧摩阻力的发挥存在最佳深度范围。
The vertical load transmission mostly depends on the side friction of pile, and there is an optimal range of depth for side friction.
此外，顶层筋材埋深与条基荷载宽度比值大小与边坡的安全性密切相关，其最佳比值随加筋层数不同而改变。
Besides, the depth of topmost geogrid to the width of strip footing is also greatly correlative to the safety factor, and the best ratio changes with the layers of geogrids.
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