Abstract: Constitution of rock－socketed piles’load-bearing properties was analyzed; based on the possibility of slippage between the pile and surrounding soil，the pile side resistance，tip resistance and embedded rock depth were calculated through three-dimensional finite element software． The relationship between the load-bearing capacities and aspect ratio， pile diameters，rock－socketed depth and bedrock was discussed． The research result indicated that the aspect ratio and pile diameters played an important role in influencing bearing capacity; excessive aspect ratio exerted little influence on bearing capacity; the existence of the optimal depth embedded in the rock-socketed piles was verified，however，it was not certain whether there was the maximum depth of embedded rock or not; the weaker the rock strength，the deeper the optimal socketed rock．

Key words: rock-socketed pile, single pile, load bearing properties, finite element analysis

摘要： 分析了嵌岩桩承载力的组成，考虑到桩身与周围土体之间存在着滑移的可能性，对其设置接触单元，利用三 维有限元软件进行了桩侧阻力、桩端阻力及嵌岩深度的分析计算。讨论了嵌岩桩承载力与长径比、桩径、嵌岩深度 及基岩强度的关系，提出了长径比和桩径都是影响嵌岩桩承载力的重要因素，过大的长径比对其承载力的提高并 不明显以及存在着合理桩径;验证了嵌岩桩确实存在着最佳嵌岩深度，但不一定存在着最大嵌岩深度，并且最佳嵌 岩深度随着基岩强度的减弱而增大。

关键词: 嵌岩桩, 单桩, 承载性能, 有限元分析