钻孔灌注桩后压浆技术可提高桩的竖向承载力、减少桩的沉降并改善桩的工程性状。本文依据西安地区某工程中采用桩侧和桩端后压浆和没压浆的 4根钻孔灌注桩单桩竖向抗压静载荷试验和桩身轴力测试的对比 ,分析了黄土地基中后压浆钻孔灌注桩桩身轴力的传递规律、桩侧阻力及桩端阻力的发挥性状 ,探讨了后压浆技术对钻孔灌注桩承载力的影响。 Bored post-grouting technology can improve the vertical bearing capacity of piles, reduce the pile settlement and improve the engineering properties of piles. Based on the comparison of static compressive load test and pile axial load test of four bored single pile grouted and grouted in the project of Xi'an with a pile side and a pile end, The transmission rule of post-grouting cast-in-place bored pile's axial force, the lateral resistance of pile and the resistance of pile tip, the effect of post-grouting on the bearing capacity of bored piles was discussed.