嵌岩桩承载性状的有限元分析

在有限元分析的基础上 ,采用Duncan非线性弹性E -B模型对嵌岩桩垂直荷载作用下的承载性状作了较为全面的探讨。指出嵌岩桩确实存在着深度效应 ,当嵌岩达到一定深度后 ,继续增加嵌岩深度 ,对桩的承载能力的提高已不明显 ,甚至无助于承载能力的提高。并得出了嵌岩桩垂直承载力与基岩强度成指数关系的结论 ,强调桩底沉渣不仅增加嵌岩桩的平均侧阻力和桩身沉降 ,而且将显著提高桩侧岩层的局部应力。文中结论可为桩基工程的科研、设计和施工提供参考

Vertical bearing capacity of rock-socketed piles

Based on finite element analysis,this thesis makes a comprehensive study on the bearing capacity of rock socketed piles under vertical load,as well as its three influencing factors socketed depth,bedrock strength and thickness of sediments.It brings forward the finite element method of rock socketed piles using the Duncan non linear elastic E-B model.The results of the analysis make sure that socketed depth has an effect on piles,and come to the conclusion that the vertical bearing capacity of rock socketed piles is in power relation with the strength of the bedrock.The results emphasize that the sediment in the pile bed will increase not only the average shaft resistance and the settlement of rock socketed piles,but also the stress in the surrounding rock significantly.These conclusions can be used as a reference in research,design and construction of pile foundation.