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由于钻孔灌注桩的混凝土与孔壁能很好的啮合粘结,从而使灌注桩有良好的侧摩阻力。但是桩底地基土的持力强度却是一个很值得探讨的问题,很有必要在施工中找出一种新方法,使其能够夯实孔底土壤,提高孔底地基土强度以增大钻孔灌注桩的承载能力。这种可以实施的新方法就是:用悬挂在打夯机械的支承滑轮上的重型夯锤,对桩孔底部土壤实行冲击夯打将土密实,然后向经过夯实的孔内灌注混凝土或打入钢筋混凝土
Because the concrete of the cast-in-place bored pile is well meshed with the wall of the borehole, the cast-in-place pile has a good side friction resistance. However, the holding strength of the soil at the bottom of the pile is a problem that is worth exploring. It is necessary to find a new method in the construction so that it can compact the bottom soil and increase the strength of the foundation soil at the bottom of the hole to increase the drilling. Casting pile bearing capacity. The new method that can be implemented is: using a heavy rammer that is hung on the supporting pulley of the ramming machine, impact the soil at the bottom of the pile hole to compact the soil, and then pour the concrete into the compacted hole or insert the reinforcement into the steel. Concrete