基于表面构造的水泥混凝土道面抗滑模型

Anti-slide model of cement concrete pavement based on surface texture

利用T10型测试车测试了某机场水泥混凝土跑道不同区段摩擦因数,利用照相法和特征描述法对道面不同尺度的构造进行了特征分析,基于测试结果,探讨了道面构造对其摩擦因数的影响规律,提出了基于构造特征参数的道面抗滑能力表达模型。根据对道面宏观、粗观和细观构造特征参数的相关分析,构建了基于构造特征的道面抗滑摩擦因数模型。研究结果表明:构造特征相近的道面,其构造深度为0.6～0.7cm时,摩擦因数为0.40～0.42;构造特征差异较大时,构造深度分别为0.70、0.78cm的区域,摩擦因数分别为0.43、0.75,构造特征对摩擦因数的影响不可忽视;基于道面构造特征的参数化分析,采用道面抗滑摩擦因数模型可定量分析旧道面抗滑性能。

The frictional coefficients of several parts for cement concrete runway in an airport were tested by an anti-slide-test truck of T10 type. Different textural features were analyzed by photo analysis method and characteristic description method. The influence law of pavement superficial texture on frictional coefficient was discussed based on test results. A model of pavement anti- slide capacity was proposed based on texture characteristic parameters. According to the analysis of macro, rough and micro texture characteristic parameters, a pavement anti-slide frictional coefficient model was proposed based on texture characteristic. Analysis result shows that frictional coefficients vary from 0. 40 to 0. 42 when constructional depths are 0. 6-0. 7 cm on the similar texture characteristic roads. For the significant different texture characteristics, frictional coefficients are 0.43, 0.75 when constructional depths are 0.70, 0. 78 cm respectively, so the influence of texture characteristic on pavement frictional coefficient can not be neglected. Based on the analysis of pavement texture characteristic parameters, the anti-slide model can be used to analyze the anti-slide capacity of old runway pavement quantitatively. 12 figs, 10 refs.