PCC桩水平承载特性足尺模型试验研究

桩在水平荷载作用下的受力性状是一个复杂的桩土相互作用过程。针对双层地基中现浇混凝土大直径管桩(以下简称PCC桩)受水平荷载的问题,利用河海大学岩土所自行研制开发的大型试验模型槽进行水平承载桩静载足尺模型试验,实测得到了水平荷载下PCC桩与土共同作用时的工作性状,分析了PCC桩受水平荷载时的内力、变形、极限承载力和桩侧土压力分布等。试验结果可为今后类似土层下水平受荷PCC桩的设计与研究提供参考。

Full-scale model tests on behavior of cast-in-place concrete pipe piles with large diameter under lateral loads

The behavior of pile under lateral loads is a very complex process of pile-soil interaction. Aimed at the problem of the interaction behavior of the laterally loaded cast-in-place concrete thin-wall pipe piles (PCC piles) installed in double-layered soils, full-scale model tests are carried out using large test trench developed by Hohai University. The interaction behavior of the lateral loaded PCC piles in double-layered soil is obtained, and the internal force and deformation of piles, the critical bearing capacity, and lateral soil pressure can be obtained from the full-scale test. These experimental results are useful for the practical engineering and analysis of PCC piles in the same areas.