期刊论文

Field Test on Deformation Characteristics of Existing Foundation Reinforced by Micro Steel Pipe Pile

中文

建筑科学与工程学报

1673-2049

2022

39

5

222-231

10.19815/j.jace.2021.08066

中央高校基本科研业务费专项资金项目（B200202091）；

本校为其他机构

依托河南理工大学锅炉房既有基础加固工程，优化微型钢管桩群桩加固既有基础的施工步骤，将既有灌注桩基础与柱身简化为一端固接一端简支梁模型并验证其准确性；开展微型钢管桩加固既有基础变形特性现场试验，测得微型钢管桩群桩施工过程中既有柱子和两柱之间地表的位移以及柱子角度的变化规律，比较顺逆结合和单一逆时针群桩施工顺序对既有柱子以及地表位移的影响，探讨加固施工过程对既有上部柱子结构的变形（位移、倾角）机理，为相关工程应用提供指导依据。试验结果表明：顺逆结合的群桩施工顺序相对优于单一逆时针压桩顺序，地表位移最大值可以减少约50%，顺逆结合或单一逆时针施工顺序引起...

Based on the existing foundation reinforcement project of Henan Polytechnic University boiler house, the construction steps of the existing cast-in-place pile foundation reinforced by the micro steel pipe pile group were optimized, and the foundation and column were simplified as a beam model fixed at one end and simply supported at the other, then its accuracy was verified. The field test on the deformation characteristics of the existing foundation reinforced by the micro steel pipe pile was carried out. The surface displacement between the existing column and two columns and the change law ...