CRTSⅢ型板式无砟轨道BIM模型研究

Study on BIM Model of CRTSⅢ Slab Ballastless Track

无砟轨道BIM模型是BIM在铁路轨道工程各阶段应用的基础和关键,但目前基于建筑模型的思路和方法不能满足无砟轨道建模需求。以CRTSⅢ型板式无砟轨道为研究对象,对其结构及参数进行分析,研究族的创建和参数的获取方法以及快速建模系统的实现技术。提出轨道结构单元概念,作为族的基础和无砟轨道建模的单元,分析其参数并归纳为基本参数和适配参数,有利于实现建模的参数化和无砟轨道与线形、线下结构的精确适配;提出轨道结构单元族的创建方法及实例化参数的获取方法;基于Revit二次开发技术开发了快速建模程序,可实现实时参数化生成线路分段模型,相对人工建立并存储模型的方法,存储量小,无需一次全部加载,对硬件性能要求低,工作效率高。

The BIM model of ballastless track is the fundamental element for the application of BIM technology in various stages of railway track engineering.At present,the ideas and methods based on building modeling cannot meet the demands of ballastless track modeling.The structure and parameters of CRTSⅢ slab track are analyzed,and the modeling method of model family,the acquisition method of parameters and the implementation technology of the rapid modeling system are studied.The concept of track structural unit,which is served as the fundamental element of CRTSⅢ slab track modeling,is proposed.The parameters of the track structural unit are classified into two categories,viz.the basic parameters and matching parameters,to facilitate parametric modeling and to adapt precisely the ballastless track model to railway alignment and infrastructure.The establishing method of track structural unit family and the acquisition method of instantiation parameters are studied.Rapid modeling program is developed based on the secondary development of Revit,which can realize parameterized generation of railway partition model in real-time.Compared with the artificial methods of modeling and storing,this model requires less memory and doesn't need to load all of them at once.It is efficient,requiring less on computer performance.