岩土力学Issue(5)：1241-1246,1254,7.
桩侧注浆抗拔桩离心模型试验与原位测试分析
Centrifuge model test and in-site observation on behaviors of side-grouting uplift pile
摘要
Abstract
A serious of centrifuge model tests of side-grouting uplift piles is performed to gain an insight into the mechanism of side-grouting and its effect. Mechanical properties of the contact surface, load-displacement curves and the development of skin friction resistance are discussed and compared with the in-situ test results. A further research shows that the development of side friction on uplift piles is a progressive procedure, with a leading increase of skin friction resistance at the upper part of the pile and followed by an increase of skin friction resistance at the lower part. Side-grouting leads to an increase in the ultimate skin friction resistance and a decrease in the relative pile-soil displacement at the ultimate state. Compared with the non-grouting pile, the side-grouting pile has a higher growing skin friction in the upper and lower part than that in the middle part. Both the centrifuge model and in-situ tests illustrate that the pile with side-grouting has significantly larger uplift stiffness and capacity than that without side-grouting.关键词
桩侧注浆抗拔桩/桩侧摩阻力/大型直剪试验/离心模型试验/原位测试Key words
side-grouting uplift pile/skin friction resistance/large-scale direct shear test/centrifuge model tests/in-situ observation分类
建筑与水利引用本文复制引用
钱建固,马霄,李伟伟,黄茂松,王卫东..桩侧注浆抗拔桩离心模型试验与原位测试分析[J].岩土力学,2014,(5):1241-1246,1254,7.基金项目
上海市科委重大项目（No.07dz12006）。 （）
