钻孔灌注桩后压浆技术效果的机理分析

Analysis on the Mechanism of the Post-grouting Technique for the Bored Pile Construction

钻孔灌注桩后压浆技术,使水泥浆液在高压下渗透、充填和挤密,与沉渣、泥皮、桩周和桩端土体发生物理化学固结,增大了土体和桩端的强度,改变了桩的受力类型,提高了桩侧摩阻力和端阻力,从而提高了单桩的承载力。

The post-grouting technique for the bored pile construction can make the cement paste penetrate, fill and compact under the high pressure, and produce the physical and chemical consolidation with the settled materials, clay skin, and the soil body around the pile and on the tip of pile, increasing the side resistance and tip resistance, and further increasing the capacity of the single pile.