摘要
结合国内相关工程实践,针对多车道高速公路路拱形式、横坡值,从新建和改扩建角度进行分析,并对多车道高速公路不同超高过渡方式和形式进行比较。结果表明:应根据新建高速公路和改扩建高速公路的特点,灵活应用双向路拱、折线型路拱和单向路拱;对于超高过渡方式,有中间带的公路均可采用绕中央分隔带边缘旋转的方式,不设路拱线适用于降雨量不大的地区,设一条路拱线可减小汇水面积和坡面汇流长度,改善路面排水,超高形式能较好地适应多车道高速公路特性。
Aims at the road arch forms and transverse slope of multilane expressway,the paper analyses from the aspect of new-built and reconstruction and extension combining with the relevant practical projects in China;meanwhile,through comparison of different super elevation transition modes and forms of multilane expressway,the outcome indicates that bi-directional arch,broken line arch and unidirectional arch should be applied flexibly according to the characteristics of new-built and reconstruction and extension expressway.For super elevation transition modes,roads with intermediate belts can be rotated around the central dividers,and no road arch is applicable to areas with little rainfall,while setting a single road arch line can reduce catchment area and slope confluence length,therefore to improve pavement drainage.In conclusion,the super elevation form can better adapt to the characteristics of multilane expressway.
作者
计月华
曹建建
JI Yuehua;CAO Jianjian(JSTI Group, Nanjing 210019, China)
出处
《现代交通技术》
2018年第6期16-18,30,共4页
Modern Transportation Technology
关键词
多车道高速公路
路拱形式
横坡值
超高
multilane expressway
road arch forms
transverse slope
super elevation
