铁路工程地质BIM系统研发与应用

Railway Engineering Geological BIM System Development and Application

铁路工程作为长大带状线性工程,地质勘察涉及区域十分广泛,沿线地质现象复杂多变,地质形态千差万别。在铁路工程BIM设计项目中,由于地质体的空间不确定性,常常难于用参数化形式表达,导致地质建模难度大、耗时长;同时,地质BIM模型作为开展BIM正向设计的基础数据源之一,设计专业对地质BIM模型的应用需求也十分迫切。因此,地质BIM研究一直是铁路工程推行全专业BIM设计急需攻克的技术瓶颈之一。从铁路工程三维地质建模与应用的需求出发,提出地质BIM快速建模的基本思路和建模流程,基于MicroStation平台通过二次开发技术自主研发铁路工程地质BIM系统,该系统解决了基于线路数据的二三维空间线路重构、二三维地质界线空间坐标转换、地质界面插值、地质体围合等关键建模技术,实现了复杂地质体模型的快速创建。在模型应用方面,实现了模型分割、模型开挖、虚拟钻孔提取、模型标准化出图等功能,解决了地质模型的应用问题。

As a long strip linear project,railway engineering involves a wide range of geological exploration areas.The geological phenomena along the railway are complex and changeable,and the geological forms are very different.In the BIM design project of railway engineering,due to the spatial uncertainty of geological bodies,it is often difficult to express them in the form of parameterization,resulting in the difficulties of geological modeling and time consuming.At the same time,geological BIM model is one of the basic data sources to carry out BIM forward design,and the application demand of geological BIM model in design specialty is also very urgent.Therefore,geological BIM research has been one of the technical bottlenecks that need to be overcome urgently in the implementation of BIM design in railway engineering.According to the requirements of three-dimensional geological modeling and application in railway engineering,the basic idea and modeling process of geological BIM rapid modeling are proposed.Based on MicroStation platform,the railway engineering geological BIM system is independently developed by secondary development technology.The system solves the key modeling technologies such as two-dimensional and three-dimensional line reconstruction based on line data,two-dimensional and three-dimensional geological boundary space coordinate conversion,geological interface interpolation,geological body enclosure,and realizes rapid creation of complex geological body models.In terms of model application,it realizes the functions of model segmentation,model excavation,virtual drilling extraction and standardized model drawing,which solves the application problem of geological model.