嵌岩扩底桩抗压承载性能分析及试验研究

Analysis and Experiment on Bearing Capacity of Bottom-enlarged Pile

通过对扩底桩破坏时受力特性的分析,确定其破坏模式。比较各部门规范中关于嵌岩桩承载力的计算方法,在规范未能准确表达此类桩抗压极限承载力的情况下,结合工程实例,研究在深嵌岩的情况下大直径扩底桩抗压极限承载力的计算方法。基于自平衡法静载荷试验所测数据,分析了桩侧摩阻力及桩端阻力,并将计算值与实测值进行了对比。

The model it destructed is made sure by analysing the characteristic of the destruction of bottom-enlarged pile .Researching on the calculational method of ultimate bearing capacity of pile with deeply embeded in terrane is made. On condition that the exact ultimate bearing capacity can not be presented by the criterions,with combining the engineering examples by comparing the calculational method on ultimate bearing capacity of bottom-enlarged pile of different department's design criterions.In order to gained the result with comparing the ultimate bearing capacity with determinative of practical ultimate bearing capacity of pile,the date gained from self-balanced measurement method of pile and the analysis of the pile tip resistance and pile side resistance are adopted.