摘要
针对雨天飞机在有水膜覆盖的水泥混凝土道面上滑跑时,易发生滑水现象引发交通事故的问题,利用人工降雨模拟试验,获得了水泥混凝土道面在3种不同降雨强度、5种不同排水长度及5种不同坡度变化下的水膜厚度试验数据。采用极差分析法,得到了水膜厚度影响因素的主次顺序。利用Minitab软件对试验数据进行回归分析,建立了水泥混凝土道面水膜厚度计算模型,并使用模型得到了不同平面尺寸道面在达到NASA试验水膜厚度时对应的降雨强度值。结果表明,在影响水膜厚度的3个因素中,排水长度起主要作用,降雨强度次之,道面坡度作用最小;3个影响因素均与水膜厚度显著相关,其中路表水膜厚度随道面排水长度的增大而明显增大,随降雨强度的增大而增大,随道面坡度的增大先迅速减小,然后减小趋势变缓;在2.90 mm/min的降雨强度下,60 m宽双面坡水泥混凝土机场跑道边缘水膜厚度达到4.09 mm,200 m宽度的飞机停机坪边缘达到NASA试验水膜厚度7.62 mm;以咸阳机场二期工程为例,绘制了在降雨强度1.954 mm/min下,指廊间停机坪的水膜厚度等值线图,其中机坪中部左右两端位置的水膜厚度预测值超过12 mm,与2.03 mm/min实际降雨强度下,停机坪该位置实测结果 13.8 mm及14.6 mm相吻合,说明计算模型可靠度高,可用于指导工程实践。
Aiming at the problem that when a plane runs on a cement concrete pavement covered with water film in a rainy day, the phenomenon of water skiing is apt to cause a traffic accident, by ＇artificial rainfall simulation test, the experimental data of surface water film thickness of cement concrete pavement under 3 rainfall intensities, 5 drainage lengths and 5 slope gradients are obtained. By range analysis method, the order of influencing factors of water film thickness is obtained. After regression analysis of the test data by using Minitab software, a calculation model of water film thickness of cement concrete pavement surface is established, and the corresponding rainfall intensity values of different plane sized pavements when reaching the thickness of NASA test water film are obtained by using the model. The result shows that （1） The drainage length plays the main role in the 3 factors which affect the water film thickness, the second is the rainfall intensity, and the effect of the pavement surface slope is the least. （2） All the 3 influencing factors are significantly related to the water film thickness, the water film thickness of pavement surface significantly increases with the increase of drainage length, increases with rainfall intensity, decreases rapidly and then decreases slowly with the increase of pavement surface gradient. （3） At the rainfall intensity of 2.90 mm/ min, the water film thickness of the edge of the 60 m wide double-sided slope cement concrete airport runwayreached 4.09 mm, and the water film thickness of the edge of the 200 m wide apron reached the NASA test water film thickness of 7.62 ram. （4） Taking Xianyang Airport Phase II Project for example, the contour map of the water film thickness between the apron corridors under the heavy rainfall intensity of 1. 954 mm/ rain is drawn. The predicted thickness of water film at both sides on the middle part of the apron is more than 12 mm, which is consistent with the measured results of 13.8 mm and 14. 6 mm under the actual rainfall intensity of 2.03 mm/min. It indicates that the computational model is highly reliable and can be used in engineering practice.
出处
《公路交通科技》
CAS
CSCD
北大核心
2018年第2期8-14,共7页
Journal of Highway and Transportation Research and Development
基金
陕西省自然科学基金项目(AKJ12B018)
