基于IFC标准扩展的铁路轨道结构BIM模型构建研究  

Research on BIM model of railway track structure based on IFC standard extension

作　　者：何庆[1,2] 荆传玉 高天赐 王平[1,2] HE Qing;JING Chuan-yu;GAO Tian-ci;WANG Ping(MOE Key Laboratory of High-speed Railway Engineering,Southwest Jiaotong University,Chengdu Sichuan 610031,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu Sichuan 610031,China)

机构地区：[1]西南交通大学高速铁路线路工程教育部重点实验室,四川成都610031 [2]西南交通大学土木工程学院,四川成都610031

出　　处：《图学学报》2023年第2期357-367,共11页Journal of Graphics

基　　金：高铁联合基金重点项目(U1934214);国家自然科学基金面上项目(51878576)。

摘　　要：建筑信息模型(BIM)技术对提高铁路行业的工程设计水平具有重要的推进作用。如何在轨道工程设计阶段充分利用BIM技术的信息化建模能力,实现设计信息的数字化传递是BIM技术在轨道设计阶段应用的一个难点。利用工业基础类(IFC)标准将轨道结构工程信息集成在BIM模型中,是克服这一问题的有效途径。针对IFC标准架构领域层实体信息缺失的不足,采用实体扩展和自定义属性集的方式对轨道领域进行扩展和定义,进而构建轨道结构基础数据框架体系,其中实体扩展包括空间结构单元、组合件、构件和零件扩展,自定义属性集则对身份信息、位置信息与技术信息进行拓展。通过扩展关系实体,结合IFC标准表达机制,构建新增轨道实体与属性集表达体系。在此基础上,进一步提出面向轨道结构BIM模型的建模方法。最后,通过一个无砟轨道案例,验证该IFC扩展与建模方法的实用性,对于提高设计阶段轨道结构BIM模型信息的完备性与可传递性具有实际的工程意义。Building information modeling(BIM)technology plays a pivotal role in enhancing the engineering design level of the railway industry.One major challenge in applying BIM technology in the track design stage is how to make full use of its information modeling ability to realize the digital transmission of design information.To address this challenge,the industrial foundation class(IFC)standard was employed to integrate the track structure engineering information into the BIM model.However,given the lack of entity information in the domain layer of the IFC standard architecture,this paper proposed to extend and define the track field using entity extension and user-defined PESTs,thereby constructing the basic data architecture system of track structure.The entity extension included the extension of spatial structure unit,combination,component,and part,while the user-defined PESTs extended identity information,positioning information,and technical information.The new track entity and attribute set expression system was constructed by extending relational entities and combining them with the IFC standard expression mechanism.On this basis,a modeling method for the BIM model of track structure was further proposed.Finally,through a ballast-less track case,the practicability of the IFC expansion and modeling method was verified,demonstrating its practical engineering significance in improving the completeness and transitivity of BIM model information of track structure in the design stage.

关 键 词：建筑信息模型 轨道工程 工业基础类 实体扩展 自定义属性集 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]