摘要
为了精确计算公路在三维空间中的实际视距,提出了空间视距的概念,通过延伸应用空间两点通视原理,建立了空间视距计算和分析的数学模型。基于计算机仿真技术开发出对空间视距的实时检测技术,通过将设计视距、运行视距和空间视距3种视距对比分析,给出了发现视距不足的方法。与早前的视距计算方法和研究相比,该方法对正常路面、行车道空间视距计算准确,能够计算和分析公路路侧附属设施对视距的影响,为公路几何设计和安全评价提供了依据。
In order to accurately calculate the actual sight distance in three-dimensional space, this paper puts forward the concept of 3D-view sight distance, sets up a mathematical model for calculation and analysis of 3D-view sight distance by applying and extending the intervisible principle between two dots. Based on computer virtual simulation technology, it develops real time checking technique for 3D-view sight distance, and puts forward a method of finding short of sight distance by contrasting three kinds of sight distance., design-vehicle sight distance, driving sight distance and 3D-view sight distance. Compared with former calculating methods and researches of sight distance, this method not only gives a way for accurately calculating 3D-view sight distance on normal pavement and carriageway, but also achieves the impact of roadside facilities on sight distance, provides a basis for highway geometric design and traffic safety evaluation. 5 figs, 10 refs.
出处
《长安大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第6期44-47,62,共5页
Journal of Chang’an University(Natural Science Edition)
关键词
道路工程
公路几何设计
行车视距
空间视距
安全评价
road engineering
highway geometric design
driving sight distance
3D-view sightdistance
safety appraisal.
作者简介
王佐（1965-），男，陕西商县人，高级工程师，E—mail：liujp09@gmail．com。
