【摘要】 从地基土的流变特性出发分析桩土体系的共同作用,地基土体采用粘弹塑性流变本构模型,桩采用弹性杆有限元分析,根据位移协调原则,得到体系平衡方程,应用"时步 初应变法"获得了不同时刻的桩土共同作用响应.通过分析得到了桩土体系中各主要因素,对桩沉降达到相对稳定所需要的时间T及桩始末沉降比Rs的影响.分析还表明了由于双桩之间的相互作用,桩的长期沉降显著降低.更多还原

【Abstract】 This dissertation is devoted to the solution for twopile interaction.Soil is modeled as viscoelastoplastic material and analyzed by finite layer method.Piles is modeled as elastic bars.By using the equilibrium equation of pilesoil system for harmony condition of displacement,the interacting result of pilesoil and pilepile can be got at any time through use of timestepinitial strain method.Some conclusions which benefit the design of pilefoundation are obtained as follows:(1)Enlarging the distance between two piles will increase the value of T(the time which costs to reach stability for soil).(2)The displacements of piles will decrease owing to the interaction of twopiles,especially the long term displacement.更多还原