振动沉管灌注桩适应复杂地层,不受地下水位高低的限制,因有套管护壁可以防止坍孔、缩孔或断桩,并且施工效率高,造价低,较同效果预制桩可降低工程造价30％左右。它适用于一般的粘性土、淤泥、淤泥质土、粉土、湿陷性黄土、稍密及松散的砂土及填土中使用;但在坚硬砂土、碎石土及有硬夹层的土层中,不宜采用。这种振动沉管灌桩,当桩长较短而要求承载 Vibro-sinking cast-in-place piles are suitable for complex formations and are not limited by the height of the groundwater table. Casing walls can prevent boring, shrinkage or broken piles, and have high construction efficiency and low cost. Compared with the same effect, prefabricated piles can reduce the number of projects. The cost is about 30%. It is suitable for use in general clayey soil, silt, silt soil, silt, collapsible loess, slightly dense and loose sand and filling, but in hard sand, gravel and hard interlayer Layers should not be used. This kind of vibration sinking pipe piles are required to bear when the pile length is short.