低承台桩基竖向荷载桩土分担比的简化计算  

Simplified Calculation of Pile-soil Sharing Ratio for Vertical Load of Pile Foundation With Low Pile Caps

作　　者：陈超 孙学先[1] CHEN Chao;SUN Xue-xian(School of Civil Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]兰州交通大学土木工程学院,兰州730070

出　　处：《价值工程》2018年第23期195-198,共4页Value Engineering

摘　　要：对于低承台桩基础竖向荷载桩土分担比问题,以桩-土-承台共同作用为基本条件,提出一种简化的计算方法。在简要介绍等值沉降法计算低承台桩基础竖向荷载桩土分担比的基础上,以桩基础与承台的竖向沉降变形协调条件作为联系桩-土-承台共同作用的桥梁,并且结合桩、承台竖向沉降的计算方法,推导出了低承台桩基础竖向荷载桩土分担比的简化计算公式。运用此公式对一个工程实例进行计算,通过分析计算结果表明该公式可行。Based on the mechanism of pile-soil-cap interaction, a simplified calculation method for vertical load Pile-soil sharing ratio of pile foundation with low pile caps is proposed. First of all, the equivalent settlement method is introduced briefly, which is used to calculate the vertical load Pile-soil sharing ratio of pile foundation with low pile caps. Then, the settlement compatibility condition of pile foundation and pile cap is considered as the bridge which relates pile-soil-cap interaction, and the calculation method of vertical settlement for pile and cap is also discussed. Finally, the simplified formula of pile-soil sharing ratio is proposed. This formula is used to calculate an engineering example, and the results show that the formula is feasible.

关 键 词：低承台桩基础 桩-土-承台共同作用 沉降变形协调 桩土分担比 公式推导 

分 类 号：TU473.1[建筑科学—结构工程]