岩土力学2017，Vol.38Issue(8)：2368-2376,2394,10.DOI:10.16285/j.rsm.2017.08.026
基于虚土桩模型的层状地基群桩沉降研究
Settlement research of pile groups in layered soils based on virtual soil-pile model
摘要
Abstract
The reinforcing and restraining effect of pile groups and the soil deformation under the pile tips are the key problems in settlement calculation of pile groups.However,the research on pile groups settlement is insufficient and needs to be continued.The reinforcing and restraining effect of pile groups was analyzed using the shear displacement method.The relations of settlement and axial force between bottom and top of each pile in layered soils were deduced by the load transfer method,respectively.Based on virtual soil-pile model,the calculation formula of virtual soil-pile length was provided.The relations of settlement and axial force between top and bottom of each virtual soil-pile in layered soils were obtained.Flexibility coefficient matrix was ascertained by the boundary conditions and the balance equations of pile section and virtual soil-pile section.Pile groups settlement was obtained based on different pile cap types.Lastly,case study indicated that settlement predicted by the present method agrees well with those measured from real test of engineering cases.The proposed method has high accuracy.The research played a complementary and promoting role on the development of settlement theory of pile groups.关键词
群桩沉降/虚土桩模型/加筋与遮帘效应/层状地基/柔度系数Key words
pile groups settlement/virtual soil-pile model/reinforcing and restraining effect/layered soils/flexibility coefficient分类
建筑与水利引用本文复制引用
辛冬冬,张乐文,宿传玺..基于虚土桩模型的层状地基群桩沉降研究[J].岩土力学,2017,38(8):2368-2376,2394,10.基金项目
国家自然科学基金项目(No.41572275).This work was supported by the National Natural Science Foundation of China (41572275). （No.41572275）
