无覆盖层嵌岩桩承载性状的有限元分析

文章采用有限元软件ABAQUS建立简化后的桩一岩三维实体有限元模型，分析了岩层坡度变化对嵌岩桩承载性状的影响，并研究了嵌岩深度和桩身强度对陡峭岩层嵌岩桩承载力的影响。计算结果表明：当岩层倾斜角较大时，岩层倾角的变化对桩的承载能力影响显著；但当岩层坡度较缓，且缓于一定坡度比时，岩层倾角的变化对桩承载性状影响甚微；适当加大桩身混凝土强度等级可以提高陡峭岩层上桩基的承载能力，而增大桩基嵌岩深度对桩承载能力的提高影响不大。

Finite Element Analysis on Bearing Capacity of Rock-socketed Pile without Covering Layer

This article used the finite element software ABAQUS to establish the simplified pile-rock three-dimensional solid finite element model, analy-zed the impact of the changes of rock slope on the bearing properties of rock-socketed piles,and studied the impact of rock- socketed pile depth and pile-body intensity on the bearing capacity of rock-socketed piles in steep stratum.The calculation results shewed that=when the tilt angle of stratum is larger,the changes of strata dip have a significant impact on the bead ng capacity of piles~ but when the stratum slop is smaller and also is lower than certain slope ratio,the changes of strata dip have little impact on the bearing capacity of piles;the appropriate increase in the concrete strength grade of pile body can improve the beadng capacity of pile foundation on steep stratum,while increasing the rock-socketed depth of pile foundation has little effect on in- creasing the bearing capacity of piles.