The consolidation settlement of soil has a great influence on negative friction acting on the sides of piles.Under the framework of unsaturated soil mechanics,based on the interaction principle of the soil-pile interface,a computation methodology for consolidation settlement of soil is proposed in this study.Firstly,according to the hydraulic equivalent principle of collapsible loess,the equivalent load after im-mersion is calculated.Subsequently,considering the consolidation characteristics of unsaturated soil,the governing equation of pore air and liquid under the equivalent load is established,and the formula for cal-culating the settlement of soil in the exhaust stage is deduced.Finally,the negative friction of the pile side is obtained according to the relationship between the settlement of soil around the pile,the axial force,and the negative friction.The rationality of the proposed method is then verified through relevant case studies.The results show that the proposed calculation method is feasible and enriches the calculation model of negative friction of the pile side.
关键词
桩基础/非饱和土固结/荷载传递/湿陷性黄土/负摩阻力
Key words
pile foundation/consolidation of unsaturated soil/loading transfer/collapsible loess/nega-tive skin friction
维普
万方数据