【摘要】 根据达西定律和质量守恒原理得到路基土中水分运动的基本方程,并以此方程作为黄土路基中水分迁移研究的理论基础。采用离心机法测定路基土的水分特征曲线,由土中水分再分布过程的原理,通过室内渗透试验得出路基土的导水参数;结合路基实测含水量来确定边界条件;应用有限元法对路基内的水分迁移规律进行数值模拟。结果表明,数值模拟结果与实测值吻合较好,能较准确地反映压实黄土路基土内的水分运动。更多还原

【Abstract】 The basic equation for water flow in unsaturated soil is deduced with Darcy law and the conservative equation of mass.Taking this equation as the theory basis,the numerical modelling of water migration in loess subgrade is carried out.According to the redistribution of soil moisture,the soil water as migrating parameters are determined.The rule of the water migrating in subgrade is studied with finite element method,its numerical modelling results are given.It is found that the numerical modelling results are in accordance with the surveying results,it can accurately reflect the law of water migrating in compacted loess subgrade.4 tabs,1 fig,6 refs.更多还原