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为定量评价机场水泥混凝土道面板板下脱空程度,结合机场水泥混凝土道面结构及弯沉测试的实际,通过采用有限元方法分析了板底脱空范围随板边/板中及板角/板中弯沉比、接缝弯沉比传递系数、地基板相对刚度半径的变化规律,得到水泥混凝土道面板底脱空范围的定量分析模型,在此基础上提出基于现有机场道面弯沉测试的板底脱空范围定量评估方法及流程。分析表明弯沉比不仅与板底脱空尺寸有关,还受到接缝传荷能力、地基板相对刚度半径的影响,不能仅通过弯沉比一个参数判断板底脱空。
In order to quantitatively evaluate the degree of emptying under the slab of airport concrete pavement slab, the concrete slab structure and the deflection test of airport cement concrete were analyzed. The deflection ratio of the slab, the transfer coefficient of the joint deflection and the relative stiffness of the foundation, the quantitative analysis model of the void area of the cement concrete slab is obtained. Based on this, Test the bottom of the void range of quantitative assessment methods and processes. The analysis shows that the deflection ratio is not only related to the void size of the bottom of the slab, but also influenced by the joint load transfer capacity and the relative stiffness radius of the base plate.