林颖孜       (福建省建筑设计研究院  福州 350001)

[提要]  高层建筑桩土间有着共同作用，承台、筏板对上层荷载起着分担作用，以某高层建筑基础桩-土-筏共同工作的设计为例，对共同作用的分析方法及现场测试进行分析、比较与探讨，说明其经济效益显著。
[关键词]  共同作用  桩土支承体系  刚度矩阵  变形协调

The joint action of piles-soil-raft for high-rise building is explained, as well as contribution of cap and raft towards load-carrying capacity. Taking an actual high-rise building as example, the author demonstrates its outstanding economic benefit by analyzing, comparing and investigating the analysis process and field testing for the joint action of piles-soil-raft of the building.
Keywords:  joint action;  load-bearing system;  piles-soil-raft;  stiffness matrix; deformation compatibility