道路坡度对路面排水的影响研究

Study on the infulence of roadway slope on pavement drainage

采用美国联邦公路管理局提出的偏沟和雨水口流量计算方法,经计算发现我国《雨水口》(16S518)标准图集中雨水口泄水能力推荐值有不合理之处。通过分析国内外道路坡度和雨水口布置的相关要求,结合案例计算,总结了道路横坡、纵坡、箅前水深和雨水口布置间距之间的变化关系,并提出道路设计漫幅的推荐值。通过调整道路设计坡度,将道路路面转变为兼具收集和输送路面雨水功能的路面行泄通道,并利用曼宁公式计算了路面行泄通道的排水能力。

The unreasonableness oi recommended inlet capacity m nanonal standard drawmgs oI Inlet （16S518） has been found out by calculating the gutter flow and inlet capacity using the Feder- al Highway Administration＇s method. By analyzing the relevant requirement of roadway slope and inlet spacing at home and abroad, combining with case calculation, the relationship between the roadway longitudinal slope, cross slope, depth of flow and the inlet spacing distance has been sum- marized. The recommended value of design spread has also been proposed. By adjusting the roadway design slope, the roadway pavement is transformed into a pavement drainage channel that collects and transports the pavement rainwater. The drainage capacity of pavement drainage channel has been calculated using the Manning formula.