路基强度对水泥混凝土路面的影响研究

利用有限差分法分析了路基土的两个主要强度参数——黏聚力和内摩擦角对水泥混凝土路面的影响，重点讨论了路基土黏聚力和内摩擦角变化时路面板的弯沉和板中最大应力的变化规律。研究结果表明:路面的弯沉均随黏聚力或内摩擦角的增加而减小，当路基土黏聚力或内摩擦角增大至某一数值后，路面的弯沉不再发生变化，也即是说施工中可找到一组最优的黏聚力或内摩擦角组合使路面弯沉最小；板中最大拉应力受路基土的黏聚力和内摩擦角的影响不明显，在施工过程中靠增大路基土强度的方法达不到减小板中拉应力的目的。

Study on Influence of Subgrade Strength on Cement Concrete Pavement

With finite difference method (FDM), this paper analyzed the influence of cohesion and internal friction angle of subgrade soil on cement concrete pavement, and focused on the change law of deflection of pavement slab and the maximum stress therein as the cohesion and internal friction angle change. The study results show that the pavement deflection decreases with the increase of the cohesion or the internal friction angle, however, when the cohesion or internal friction angle increases to a certain value, the pavement deflection will not change any more, that is to say, an optimal combination of cohesion or internal friction angle may be found out during construction so as to give minimum deflection of pavement. The tensile stress in the pavement slab has minor change with the cohesion and internal friction angle, thus during construction, increasing the strength of subgrade soil can not reduce the tensile stress in the slab.