无覆盖层嵌岩桩承载性状的有限元分析  

Finite Element Analysis on Bearing Capacity of Rock-socketed Pile with-out Covering Layer

作　　者：陶晶晶[1] 王伟[2] 

机构地区：[1]重庆交通大学国家内河航道整治工程技术研究中心,重庆400074 [2]重庆交通大学土木建筑学院,重庆400074

出　　处：《西部交通科技》2013年第12期20-23,58,共5页Western China Communications Science & Technology

基　　金："十二五"国家科技支撑计划项目"长江上游航运开发关键技术研究"(2012BAB05B00)

摘　　要：文章采用有限元软件ABAQUS建立简化后的桩-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。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.

关 键 词：嵌岩桩 有限元 岩层倾角 承载力 

分 类 号：U443.15[建筑科学—桥梁与隧道工程]