套管成孔灌注桩的成孔工艺,包括锤击套管成孔和振动套管成孔。它是将钢套管套在预制钢筋混凝土桩尖上、或套在用钢板制成的活瓣桩尖上,然后,用桩锤锤击套管的方法、或用激振器振动的方法,使套管和桩尖下 The hole forming process of the casing into the bored pile comprises hammering the sleeve into a hole and vibrating the sleeve into a hole. It is a method of placing a steel sleeve over a prefabricated reinforced concrete pile tip or a steel valve pile tip, and then hammering the sleeve with a pile hammer or vibrating with an exciter. Under the casing and tip