A. 桩端置于完整、较完整基岩的嵌岩桩,其单桩竖向极限承载力由桩周土总极限侧阻力和嵌岩段总极限阻力组成
B. 其他条件相同时,敞口钢管桩因土塞效应,其端阻力大于闭口钢管桩
C. 对单一桩端后注浆灌注桩,其单桩竖向极限承载力的提高来源于桩端阻力和桩侧阻力的增加
D. 对于桩身周围有液化土层的低承台桩基,其液化土层范围内侧阻力取值为零
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