基于共同作用的桩筏基础分析及设计  

Analysis and Design of the Pile-Raft Foundation Based on the Combined Action

作　　者：申兆武[1] 白建方[1] 张高峰 

机构地区：[1]石家庄铁道学院土木工程分院,石家庄050043 [2]河北豫龙岩土工程有限公司,石家庄050000

出　　处：《建筑科学》2009年第7期21-24,共4页Building Science

基　　金：石家庄铁道学院博士基金

摘　　要：以宏达国际酒店高层建筑桩筏基础为工程背景,采用Poulos位移解计算桩土刚度,Reissner厚板理论分析桩基筏板,并利用该方法对桩筏体系的总体沉降、差异沉降、桩顶反力、筏板内力等结果进行了计算。此法较现有的桩基设计规范中基于筏板绝对刚性假定的计算具有一定的优越性。通过分析计算结果总结变化规律,认为荷载密度对此类基础的局部沉降、桩顶反力影响较大。分析结果能够为高层桩筏基础工程的设计提供有益参考。The pile-raft foundation＇s average settlement, differential settlement, axial force of the pile, stress of the raft and so on are analyzed through the methods, which include Poulos displacement theory for counting the pile-soil system and Reissner thick for plank calculating the raft. One actual pile-raft foundation, which is used for the high-rise building of Hongda international hotel, has been analyzed. The results show that the differential settlement and the axial force of piles of are mainly controlled by the local load＇s density. The regularities can give some help to the design of similar pile-raft foundations.

关 键 词：桩基础 高层建筑 Poulos解 Reissner厚板理论 

分 类 号：TU473.1[建筑科学—结构工程] TU470.3[建筑科学—土工工程]