Research on axial force test of large diameter piles

Based on the test of the single pile load,axial force from different depth can be measured in the way which dividing the depth of the pile into several sections by stratifying the pile and burying reinforcement meter into it evenly.Settlement of the top of pile under various levels load is also measured in the same way.Under the vertical load,Q-S curve characteristics of the single pile as well as distribution of the axial force are precisely analyzed in this article.Pile axial force along the pile gradually decays with the increase of the load level;the rate of the decay is getting bigger at the same time.It changes severely with the change of the depth of the pile.