龚维明  施明征  孙  逊
     （东南大学 南京 210096）

[提要]  对桩底压浆灌注桩在各种地质条件下的工作机理进行了分析，利用静载试桩结果，统计出单桩承载力压浆较未压浆其承载力提高的范围，给出了该桩承载力计算建议公式。
[关键词]  灌注桩 压浆 承载力

Grouting at the piles bottom is one effective method to improve the bearing capacity of cast-in-place pile. The working mechanism is analyzed under different soil conditions. By using static load testing results, imporvel value of bearing capacity with grouting over non-grounting is calculared. The author suggests a formula to calculate the bearing capacity for this kind of pile.
Keywords: cast-in-place pile; grounting; bearing capacity