在自重湿陷性黄土地区,通过现场试验及监测对比了普通灌注桩和桩端后注浆灌注桩在设计荷载作用下的桩身轴力和桩侧阻力的变化情况,并通过桩基(竖向)静荷载试验对各试验桩进行了承载力检测。结果表明,位于该湿陷性黄土场地的干作业钻孔灌注桩在后注浆后承载力明显提高,桩身中性点位置下降,同时提供了桩端后注浆灌注桩承载力估算时桩侧阻力增大系数的取值。 In the self-weight collapsible loess area, through the field test and monitoring, the changes of pile axial force and pile-side resistance of ordinary grouting pile and post-grouting grouting pile under the design load were compared and analyzed. To) static load test on the test pile bearing capacity test. The results show that the bearing capacity of dry-laid bored piles at the collapsible loess site increases remarkably after grouting, and the neutral point position of the pile body decreases. At the same time, the post-grouting grouting piles’ Side resistance increases the value of the coefficient.