以台州湾大桥及接线工程TS09标段的两根桩底后压浆超长钻孔灌注桩自平衡法荷载试验为工程背景,对压浆前后侧摩阻力、桩端承载力以及桩基整体承载性能进行了分析。注浆前后荷载试验表明桩底压浆后桩底、桩侧和桩基整体承载性能得到明显改善。说明在一定地质条件下桩底压浆对提升超长钻孔灌注桩桩基整体承载性能具有积极作用。 Taking the self-balance load test of two post-grouting over-long bored piles in TS09 section of Taizhouwan Bridge and connection project as the engineering background, the influences of the lateral friction, pile-end bearing capacity and overall pile bearing capacity Performance was analyzed. The load test before and after grouting shows that the overall bearing capacity of pile bottom, pile side and pile foundation are obviously improved after grouting. This shows that under certain geological conditions, the grouting at the bottom of the piles has a positive effect on the overall bearing capacity of the super-long bored pile.