水泥混凝土路面脱空状况下的弯沉分析

采用Winkler地基不等平面尺寸双层双块板模型,分析了基层横向超宽Ba、板角脱空尺寸Lv及不同结构组合对板中、板角弯沉及弯沉传荷效率W、弯沉指数DI的影响。结果表明,不同结构组合中,板中、板角弯沉不同,基层超宽Ba、板角脱空尺寸Lv的变化对板角弯沉影响比较显著,对板中弯沉影响不大。弯沉传荷效率W、弯沉比DI随脱空量变化曲线具有相关性。分析结果可用于水泥混凝土路面板底脱空的评价。

Analysis of deflection for Cement Concrete Pavement Structure with Void

Using a mechanistic model of double-layered and double-slabs pavement structure with unequal planar dimension resting on Winkler foundation,the influences of base extension Ba,void size beneath slab Lv and structure combinations on the deflection of center and corner,deflection-based load transfer efficiency W and deflection index DI are analyzed.The results showed that the deflection of center and corner of different structure are different,the influences of base extension Ba and void size beneath slab Lv on deflection of corner are significant,however they influent little on deflection of center.Deflection-based load transfer efficiency W and deflection index DI are relative to void size beneath slab Lv.The results can be used to evaluate the void beneath slab of cement concrete pavements.