基于虚拟视景的公路线形安全设计审查方法研究

Design CheckingMethod of Highway Alignment Safety based on Virtual Scene

鉴于目前国内路线设计成果审查主要依照相应的评价规范和技术标准对图纸及其设计说明进行审核,是一种二维静态的＂平面视图＂,具有局限性、不彻底性等不足,提出基于计算机仿真技术的公路路线动态审查方法。阐述了虚拟视景的路线安全审查原理,讨论路线三维立体实景模型的构建,论述了路线设计安全的判定准则和方法。结合某新建高速公路勘察设计实际,将路线设计成果导入该仿真系统中,实现车辆在三维真实环境中的实时漫游,提取路段线形参数。结果表明,实时动态仿真直接地展现出各指标的运用以及路线与地形的适应性,实现了对路线安全设计进行参数化的分析与判断,同时也可为路线设计修改提供依据。

At present, highway routedesign ischecked according to corresponding evaluation specifications and technical standard,which is a kind of a two-dimensional static view with limitations,unthoroughness and other deficiencies.In the paper a method of dynamic review ofhighway route is put forward by using computer simulation technology.The principle of route safety review by virtual scene is expounded,the establishment of 3D model with real viewsof route is discussed,and the principles and methods of road design are elaborated.Combined with thedesign of a new expressway,the route design isbrought into the simulation system,the vehicles＇real-time roaming in the 3D environment is realized,from where the road alignment parameters can be extracted.The practice shows that the real-time dynamic simulation can directly exhibit the application of each index and the adaptability between the route and terrain,which achieves the parametric analysis and judgment of the route safety design,and also provides a basis for design revisionof route.