长短桩复合地基桩土荷载分担比研究

Research on Pile-soil Proportion of Load of Long-short-pile Composite Foundation

对长短桩复合地基在竖向荷载作用下的力学性状进行了研究,揭示了长短桩复合地基在不同桩土刚度比条件下桩土相互作用、荷载分担比、桩土应力比及荷载传递方面的变化规律。试验结果表明,此类复合地基能使刚性桩、柔性桩以及土体协调变形,合理发挥它们各自的承载能力,为今后的设计和推广应用提供了依据。

The mechanics properties of the long-short-pile composite foundation by scale model tests under vertical load are studied,The principles of pile-soil interaction,pile-soil proportion of load,stress ratio of pile to soil and transferring of load are revealed by experiments under different pile-soil stiffness ratio.The test results indicate that the rigid pile,the flexible pile and soil can interact on each other very well,their bearing capacities can be developed reasonably,and some conclusions are provided as references for future design and application of this kind of composite foundation.