刚-柔性桩复合地基变形特性有限元分析  

Finite element analysis of deformation characteristics of composite foundation with rigid-flexible piles

作　　者：朱奎[1] 徐日庆[1] 郭印[1] 周鹏飞[2] 

机构地区：[1]浙江大学,杭州310027 [2]温州大学,浙江温州325000

出　　处：《岩土力学》2008年第4期937-942,共6页Rock and Soil Mechanics

基　　金：浙江省建设厅科研项目(No.20050568);温州市科技技术局资助社会发展项目(No.S2005A013);温州市瓯海区科技技术局资助社会发展软课题(No.200522)

摘　　要：在现场试验基础上对条形基础下刚-柔性桩复合地基进行有限元模拟分析。着重讨论了褥垫层、承台、刚性桩、柔性桩等的参数变化对刚-柔性桩复合地基沉降特性的影响。结果表明,复合地基沉降随着褥垫层厚度减小而减小,随着褥垫层模量增加而减小,承台厚度增加有利于减少差异沉降,刚性桩是控制沉降的主要构件,柔性桩桩长增加可以减少差异沉降。分析结果为刚-柔性桩复合地基的优化设计提供理论基础。Composite foundation with rigid-flexible piles under strip foundation is analyzed by means of finite element method on the basis of field test. The influential factors including cushion, cap, rigid pile and flexible pile on deformation characteristics of composite foundation with rigid-flexible piles are studied systematically. The results indicate composite foundation settlement reduction along with cushion thickness reduction and module increment, cap thickness increment is advantageous to differential settlement reduction, rigid pile is main component to control settlement; flexible pile increment can reduce differential settlement. These conclusions are helpful for optimum design.

关 键 词：刚-柔性桩复合地基 有限元 沉降 优化设计 

分 类 号：TU470.3[建筑科学—结构工程] TB115[建筑科学—土工工程]