该文通过素砼桩复合地基现场载荷试验测定桩顶反力、桩间土反力 ,研究桩、土受力特征。分析了复合地基桩土应力比 ,桩、土荷载分担比 ,桩体应力集中系数及桩间土应力减小系数的变化规律。 In this paper, the pile top reaction force and soil reaction force between piles are measured by the field load test of the composite concrete pile composite foundation, and the pile and soil mechanical characteristics are studied. The variation law of pile-soil stress ratio, pile, soil load sharing ratio, pile stress concentration coefficient and soil stress reduction coefficient of composite foundation are analyzed.