岩土工程学报Issue(6)：1005-1011,7.DOI:10.11779/CJGE201406003
考虑软岩剪胀效应的嵌岩桩荷载传递机理分析
Load transfer mechanism of socketed piles considering shear dilation effects of soft rock
摘要
Abstract
For the socketed piles under vertical load, pile-rock joint shear dilation effect has a great influence on side friction. This issue is based on a nonplanar failure model of pile-rock joint. Firstly, the value of shear force is solved when asperity fails by means of the slip-line field theory, and the corresponding shear displacement is obtained. A shear function is established based on the shear dilation mechanism, and the comparison with the experimental results shows a good correspondence. Secondly, based on the derived shear function, the load transfer equations for the pile are established considering the dilation effects, and the expression for load transfer of the pile is deduced. Furthermore, the effect of several parameters on plastic shear force is analyzed, such as joint roughness and rock strength and normal stiffness. Finally, a project is taken as an example, and the load transfer curve of the pile is calculated and compared with the measured one. The results are in good agreement with the measured data, which verifies the availability of the proposed method.关键词
桩基础/嵌岩桩/软岩/荷载传递/剪胀效应Key words
pile foundation/socketed pile/soft rock/load transfer/shear dilation effect分类
建筑与水利引用本文复制引用
赵明华,夏润炎,尹平保,杨超炜,徐卓君..考虑软岩剪胀效应的嵌岩桩荷载传递机理分析[J].岩土工程学报,2014,(6):1005-1011,7.基金项目
国家自然科学基金项目 （）
