福 建 建 筑Fujian Architecture & Construction 2019年第04期
总第250期No 04 • 2019Vol - 250
只见树木
两种沥青面层暴雨下水膜厚度对比研究
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—排水沥青面层与普通沥青面层官建安
(福州市规划设计研究院福建福州350108)
茄子的10种家常做法
你不再属于我摘要:降雨时雨水沿道路坡面形成了一定厚度的径流,简称为水膜。当水膜厚度达到了一定值时,高速行驶的车辆 下轮胎与路面之间的水就不能及时排出,轮胎与路面间接触就不能保证,导致汽车的速度和方向无法控制(路面横坡 就是为了加快排水,减少水膜厚度,增加雨天行车安全性而设置(通过对国内外学者的实验和研究结果进行比较,选 择较为可靠的计算方法,比较了不同路面横坡下沥青路面在采用排水沥青面层和沥青混凝土和SMA 面层在福建5年 一遇降雨强度下的水膜厚度,得出的结果反映出排水沥青面层不仅具有噪声低、行车舒适、夏天路面温度低等优点,而 且在采用较低的路面横坡情况下也能有较低的水膜厚度,可以在条件受限制情况下代替需要采用较大路面横坡的AC 或SMA 路面(
关键词:沥青面层;暴雨;路面水膜厚度;路面横坡;排水路面
许娣个人资料
中图分类号:U41 文献标识码:A 文章编号:1004 -6135(2019)04 -0086 -03Comparative study of water 一 film thicknes s of two kinds of asphalt surface during heavy rain
------Porous asphalt pavement vs. orrinary asphalt pavement
GUAN Jian ' an
(FUZHOU Planning Design & Rearch Institute , Fuzhou 350108 )
鹿茸食用方法
好听的快手昵称Abstract : Rainwater forms a certain thickness of runoO along the slope of a road during a heavy wimaX or rainstorm , known as water film. Hydroplaning of vehicles is bound to occur as the water film reaches a depth of 2. 54 millimeters or thicker at a driving speed as low as 72 kilometers per hour. During hydroplaning , the water film prevenW full contact between the tire of a vehicle and the road sutace , causing the loss in speed control and directional control of the vehicle. For sle driving during periods of rainfaC, a sufficient amount of cross slope is necessae for effective drainage of rainwater off pavement sutaco and quick reduction in water - film thickness. Bad on a comprehensive review of the latest expeWmentgi and rearch results as well as the reliable alyorithms developed in recent domestic and international stud ies ,the author calculated and compared the thickness of wat
er film during a once - in - 5 - year wimaX in Fujian Province , China on roads wiih dioeeeniceossopesand paeed wiih iwodioeeenisueoacecoues , i.e. , ihepoeousasphaipaeemenisueoacecoueand iheconeen- tionai asphalt concrete overlaia with a stone matrin asphalt ( SMA) sutace. The comparison results reveal that relative to the conventional asphaaic6nceeiepaeemeni ( wiih aSMAsueoace ) , ihep6eusasphaaisueoacec6ueioeciieein eeducingihewaiee-oiam ihicknes6n road sutaces, even on tho with a fairly low cross slope. Considering the additional advantages of low noi, comfortable driving , and low sutace temperature in summer, the porous asphalt sutace cour outpetorms and can beneficially replace the conventional asphalt concrete pavement ( with a SMA sutace ) that would othetvi require laraer cross slopes.
Keyworls : Asphalt pavement ; Rainstorm ; Water - file thickness on road surface ; Cross slope ; Porous asphalt pavement o 引言
暴雨时,高速行驶的汽车事故率通常较高,究其
原因,除了下雨视线不良外,其他因素都与降雨时路 面与车轮摩擦系数降低有关[1](降雨时,雨水沿道路坡度排走,其表面形成了一
定厚度的径流,简称为水膜(沥青路面表面水膜厚度建立近义词
超过一定厚度后,汽车高速行驶时,路面与轮胎间的作者简介:官建安(1960.6 -),男,高级工程师。
E-mail :513859446@ qq. com带舟的诗句
收稿日期:2019 -02-11 雨水不能及时排出,路面与轮胎的接触不能保证,此 时对汽车来说,路面的摩擦系数急剧降低,致使汽车 的速度和方向都难以控制,不能安全行驶。该厚度与 车速、胎面纹理、轮胎气压、胎面摩损程度、车辆轴重、 路面状态等相关,通常称为“临界水膜厚度”。车越
轻,车速越高,轮胎花纹磨损越大,该临界值越/J 、(刘建-等在文献+ 2 ]中提出的基于安全容许速 度的雨天公路可变限速方法⑵,该可变限速控制系统
中最重要的基础数据是道路交通气象数据,其采集采
用交通气象站和路面状态传感器(交通气象站采集 气象信息,如降雨强度、能见度等信息,并据之采用可
变限速方法来降低雨天的事故率。