基于WebGL引擎的铁路工程BIM+GIS平台研发及(设计阶段)应用

The Research and Application(the Design Stage)of Railway BIM+GIS Platform Based on WebGL Engine

随着铁路行业BIM设计软件和二次开发插件的不断完善,铁路工程中的BIM设计方法正日趋成熟。为了更好地解决BIM软件自身在整体组装、周边地理信息融合、模型尺度表达、一致分析、全局定位存在的不足,提升设计模型集成和信息共享的效率,解决设计人员对设计区域场景立体感不足、多源信息获取不直观、设计专业间交互欠缺及汇报展示过程效率低等问题,依托某铁路项目,开展了针对铁路工程的BIM+GIS平台研究。平台整体采用B/S模式,后台通过融合多源GIS数据、多专业BIM设计模型数据和项目专业人员角色权限数据的综合数据应用构建方案,实现了多源数据的融合与入库;前端以WebGL引擎为底座,开发实现基于设计阶段的场景应用。在此基础上,平台实现了基于人员角色权限的多源异构GIS数据和多专业BIM模型数据的整合与共享,实现了场景数据基础管理、三维空间分析、三维标注与绘制、定位展示查询和快速建模等功能。通过某铁路实际应用验证表明,该BIM+GIS平台准确还原线路周边地理、地质环境,在方案优化、专业接口优化、专业设计优化、差错漏碰冲突检查及可视化交付方面提高了专业内部和专业间的协同设计效率,减少了设计中的差错漏碰及丰富了汇报展示手段,拥有良好的应用效果。

With the continuous improvement of the BIM design software and the secondary development plug-ins in the railway engineering,BIM design methods in railway engineering are becoming more and more mature.In order to better solve the shortcomings of BIM software in overall assembly,surrounding geographic information fusion,model scale expression,consistent analysis and global positioning,to improve the efficiency of design model integration and information sharing,and to overcome the problems of designersinsufficient three-dimensional sense of the design area scene,non-intuitive acquisition of multi-source information,lack of interaction among design professionals and low efficiency of reporting and display process,researches on BIM+GIS platform for railway engineering are carried out based on a railway project.The whole platform adopts B/S mode.By integrating multi-source GIS data,multiprofessional BIM design model data and projects,professions,personnel,roles and permissions data,the background realizes the integration and warehousing of multi-source data.The front-end uses WebGL engine as the technical base to develop and implement the scene application based on the design stage.On this basis,the platform fulfills the integration and sharing of multi-source heterogeneous GIS data and multi-professional BIM model data based on projects,professions,personnel,roles and permissions,and realizes the basic management of scene data,three-dimensional spatial analysis,three-dimensional annotation and rendering,positioning,display,query and rapid modeling.The practical application of a railway project shows that the BIM+GIS platform accurately restores the geographical and geological environments around the line.In the aspects of solution optimization,professional interface optimization,professional design optimization,error,miss collision,conflict inspection and visual delivery,the platform improves the efficiency of collaborative design within and between majors,reduces the error and miss collision in design,and enriches the means of reporting and display with good application effect.