根式沉井基础水平向荷载试验研究  

Horizontal Load Test Study of Root Type Caisson Foundation

作　　者：张立奎[1] 章征[1] 殷永高[1] 

机构地区：[1]安徽省高速公路总公司,安徽合肥230051

出　　处：《桥梁建设》2009年第3期33-36,共4页Bridge Construction

摘　　要：为研究根式沉井基础的水平承载特性,对其进行水平承载力测试,试验加载采用慢速维持荷载法。测试出同等直径和长度根式沉井基础和普通沉井基础的水平承载力,同时分析根式沉井基础的变形、井身弯矩及所承担的周围土抗力。试验结果表明:根式沉井基础与普通沉井基础相比,承载力大幅提高;根式沉井基础顶部水平位移较大,底部水平位移较小,基础中上部所受土抗力较大,对整个基础承担水平荷载起主要作用。To study the horizontal bearing behavior of the root type caisson foundation, the horizontal bearing capacity of the caisson is tested and the caisson is loaded by the slow load holding method in the test. The horizontal bearing capacity of the caisson and the common caisson with equal length and diameter is measured and the deformation, caisson body moment and the surrounding soil resistance onto the caissons are analyzed. The results of the test indicate that the horizontal bearing capacity of the caisson is greatly improved in comparison to that of the common caisson, the horizontal displacement at the top of the caisson is great while at the bottom, the displacement is little. The soil resistance in the middle and top of the caisson is great, which plays the main role of the horizontal load bearing of the whole .caisson.

关 键 词：根式沉井基础 水平载荷 静力试验 

分 类 号：TU476[建筑科学—结构工程]