太原理工大学学报2025，Vol.56Issue(6)：1190-1199,10.DOI:10.16355/j.tyut.1007-9432.20230702
非饱和土中摩擦桩的竖向瞬态响应研究
Transient Response of Float Pile Under Vertical Impact Loading in Unsaturated Soil
摘要
Abstract
[Purposes]On the basis of the dynamic governing equation of three-dimensional po-rous media,the vertical transient response of float pile in unsaturated soil is analyzed with considering of the coupling effect of liquid and gas phases.[Methods]The vertical wave equation of transform do-main in unsaturated soil under cylindrical coordinate system was established by using Laplace trans-form and method of normalization.Then,the method of separation of variables and operator decompo-sition theory were used to solve the dynamic equation.Thus,the form of displacement solution of the Laplace transform domain in unsaturated soil was obtained.According to the boundary conditions of pile and soil,the dynamic equilibrium equation of pile was solved and the analytical solutions of verti-cal displacement and internal force of pile in transformation domain were obtained.[Results]The model is verified through the comparison with the single-phase models and saturated models by La-place inverse transformation of numerical calculation.Saturation and pile tip reaction coefficient on re-sponse of pile are investigated.The results show that:The saturation and pile tip reaction coefficient have certain influence on the pile displacement and internal force,and the larger saturation,a greater vertical displacement for the float pile.The lager pile tip reaction coefficient,the greater the pile dis-placement,and the later the peak displacement arrives.Besides,with the increase of pile-to-soil modulus ratio,the pile displacement decreases first and then increases along the pile depth.关键词
非饱和土/竖向振动/摩擦桩/瞬态响应Key words
unsaturated soil/vertical vibration/float pile/transient response分类
建筑与水利引用本文复制引用
孙箭林,刘圆圆,章敏..非饱和土中摩擦桩的竖向瞬态响应研究[J].太原理工大学学报,2025,56(6):1190-1199,10.基金项目
江西省教育厅科技项目(No.GJJ2207305) （No.GJJ2207305）
河北省地震灾害防御与风险评价重点实验室开放基金资助项目(FZ213106) （FZ213106）
山西省基础研究基金面上项目(20210302123168) （20210302123168）
