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针对道路与桥梁排水设计的重要性以及下凹式立交桥局部易涝的脆弱性,简要介绍了美国几个典型大城市的道路排水设计标准与关键措施、方法,如道路的下凹地段排水设计与校核标准,下凹地段雨篦子的设置与间距的考虑,下凹地段排水泵站设计中的注意事项,排水泵站出水管的设计以及和周围排水设施的相互关系等。根据我国城市化快速发展,大型城市不断增加,人口与社会经济密度急剧增高等特点,结合美国的具体实践,提出我国大型城市道路与下凹式立交桥段排水设计标准的建议。
Aiming at the importance of road and bridge drainage design and the vulnerability of local over water logging in underpass, this paper briefly introduces the design standards and key measures of road drainage in several typical big cities in the United States, such as the drainage design and The check standard, the setting and spacing of the rain grate in the concave section, the precautions in the design of the drainage pumping station in the concave section, the design of the outlet pipe of the drainage pumping station, and the relationship with the surrounding drainage facilities. According to the rapid development of urbanization in our country, the increasing of large cities and the rapid increase of population and social economy density, the author puts forward some suggestions on drainage design standards for large urban road and underpass overpass in the United States.