承台(基础)-桩-土不同构造形式下的相互作用研究  

A study on the interaction of cap(foundation),pile and soil

作　　者：郑刚[1] 高喜峰[1] 任彦华[2] 吴永红[2] 

机构地区：[1]天津大学土木工程系,天津300072 [2]天津市勘察院,天津300191

出　　处：《岩土工程学报》2004年第3期307-312,共6页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金资助项目 (50 2 0 80 1 2 ) ;建设部 2 0 0 2科研攻关项目 (0 2 - 2 - 1 .1 1 )

摘　　要：桩与承台 (或基础 )之间可能有嵌入、接触和隔一层褥垫层三种构造形式 ,针对现有桩与承台连接的复合桩基和在桩顶设置褥垫层的刚性桩复合地基构造形式 ,提出了在桩顶与基础之间预留净空以发挥土承载力的一种新的构造形式。对不同构造形式 ,进行了一系列现场足尺单桩复合地基试验 ,对竖向荷载作用下承台 (基础 ) -桩 -土相互作用、破坏模式、承载力确定等进行了对比分析与研究。In this paper, the relation between cap(foundation) and pile is classified into three types based on the load transfer mechanism.The first one is that pile head is imbedded into cap, the second one is that there is a layer of granular mat between foundation slab and pile head,and the third,as suggested in this paper, is that there is a certain gap between foundation slab and pile head,with the foundation being directly on the top of soil. A series of full scale loading tests are carried out to investigate the difference of the interaction among foundation slab, pile and soil, the failure pattern and the bearing capacity of these different kinds of composite ground under vertical load.

关 键 词：桩基 承台 褥垫层 刚性桩 复合地基 承载力 

分 类 号：TU473[建筑科学—结构工程]