【摘要】 基于考虑渗透系数非线性的饱和多孔介质一维热-水-力耦合控制方程,提出有限差分数值求解方法,并编制相应程序。利用该程序对一算例进行分析。结果表明:在渗透系数为常量的情况下解答与现有解析解答完全一致,验证了数值解和程序的正确性。考虑渗透系数随温度非线性变化的热固结,对温度场变化没有影响,但孔压消散明显加快,达到最终沉降量所需时间也减小。温度荷载越大,固结越快。更多还原

【Abstract】 Thermal consolidation was one of the hot issues in the research of geotechnical engineering in recent years. Coupled thermal-hydraulic-mechanical governing equations were used in many works but few took nonlinear permeation coefficient into account. Based on fully coupled thermal-hydraulic-mechanical formulation of saturated soil,the characteristics of the permeation coefficient were considered and finite difference numerical method was put forward to solve the problem. A program was worked out for case analysis. Present solution agreed well with existing analytical solution when permeation coefficient was constant,which verifies the rationality of the finite difference numerical method and the accuracy of the program. When permeation coefficient changed nonlinearly with temperatures,thermal consolidation had no influence on the temperature field,but it significantly accelerated the pore pressure dissipation and shorts the time required to reach final settlement. And the greater the temperature load,the faster the consolidation.更多还原