The technology of grouting after pile driving at the bottom of pile makes up for some inherent defects caused by the bore cast-in-place pile protecting bore wall with mud and thereby it enhances the bearing capacity of pile greatly.

• 泥浆护壁钻孔灌注有一定的缺陷，桩底后压浆技术有效地弥补了这些缺陷，并能大幅度提高承载力。