支盘灌注桩承载特性的试验研究

Experiment and Research on Bearing Capacity of Dry-bored Pile with Enlarged Footings

通过对支盘灌注桩的静载荷试验表明：Q-S曲线属陡降型，其单桩承载力显著高于普通灌注桩，且承载力的提高很大取决于支盘的数量和位置；桩体传递给桩侧土的荷载较大，桩端阻力得到有效提高；成型完好的情况下在支盘处的摩阻力显著增加。

By still-load-bearing testing of dry-bored piles with enlarged footings,the endurance of these piles is revealed in this paper.With sharply-dropping Q-S curves,the bearing capacity of single pile is greatly superior than a nomal one,which relates to the quantity and position of enlarged footings;The Loads handed to the earth around piles are heavier,the bottom resistance increases more effectively as well;Furthermore,the piles with enlarged footings correctly constructed have positive effect on side resistance.