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扩底修正系数β用于修正桩基扩底对桩端阻力的影响,其值如下图所示:
( 和 的关系曲线):
确定系数β的曲线图
其中:
H
-
桩长
Deq
等效桩身直径
deq
等效扩底直径
在NBN EN 1997-1 ABN(比利时规范)中,系数 β 可按照下面图标插值选用:
其中:
Db,eq
桩端等效直径 [m]
Ds
桩直径 [m]