铁道科学与工程学报2016，Vol.13Issue(4)：600-605,6.
高速铁路桩(帽)网和桩筏复合地基模型试验研究
Experimental study on CFG pile-(cap-)-net and pile-raft composite foundations of high speed railway
摘要
Abstract
Based on the model test,the settlement and load transfer rule of pile-net,pile-cap and pile-raft composite foundations were analyzed.Although serveral differences are found among these composite founda-tions,the overall regularity is similar.All these composite foundations have a certain effect on settlement reduc-ing,and the settlement has an exponential increase as the load increases.Among them,the settlement of pile-raft composite foundation is the minimum one.With the increase of depth,pile body stress increases firstly and then decreases.The maximum value appeared in a certain depth under the top of pile.As the load increases,the stress ratio of pile-soil increases linearly.Under the same load level (such as 100 kPa),the settlement and pile top stress of pile-raft composite foundation are minimum (5.1 mm,142 kPa)while stress ratio of pile-soil is the maximum(7.12).So the reinforcement effect of pile-raft composite foundation is more significant. To a certain extent,the conclusions obtained by this paper can provide reference for the study of the composite foundation theory and engineering research.关键词
高速铁路/复合地基/承载特性/变形特性/模型试验Key words
high speed railway/composite foundation/bearing characteristic/settlement/model test分类
交通工程引用本文复制引用
李善珍,马学宁,时瑞国..高速铁路桩(帽)网和桩筏复合地基模型试验研究[J].铁道科学与工程学报,2016,13(4):600-605,6.基金项目
国家自然科学基金资助项目(41562014) （41562014）
长江学者和创新团队发展计划资助项目(IRT1139) （IRT1139）
