语义约束的铁路隧道BIM模型轻量化方法  

A Lightweight Method for BIM Data of Railway Tunnel with Semantic Constraints

作　　者：赵静 郭永欣 丁雨淋 黄贤喆 王玮 ZHAO Jing;GUO Yongxin;DING Yulin;HUANG Xianzhe;WANG Wei(Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu 611756,China;State Key Laboratory of Rail Transit Engineering Informatization(FSDI),Xi'an 710043,China)

机构地区：[1]西南交通大学地球科学与环境工程学院,四川成都611756 [2]轨道交通工程信息化国家重点实验室(中铁一院),陕西西安710043

出　　处：《地理信息世界》2022年第6期89-94,共6页Geomatics World

基　　金：国家自然科学基金项目(41941019)。

摘　　要：GIS与BIM集成是铁路隧道工程信息化的关键技术,越来越多的长隧道构件级BIM模型,几十公里长的铁路隧道BIM模型如何在GIS中实现高性能可视化分析成为挑战性难题。目前,高精度复杂铁路隧道BIM模型多以参数化形式表达,转换为GIS模型后几何数据量急剧增大,同时GIS通用标准中针对隧道BIM模型的构件尺度层级划分存在不一致等情况,难以实现铁路隧道工程场景精细化管理与高效可视化分析。为此本文提出了一种语义约束的铁路隧道BIM模型轻量化方法,首先建立铁路隧道BIM模型多细节层次描述规则,然后利用构件语义信息提取并简化构件几何信息,获取多细节层次模型数据,并对多细节层次模型进一步优化组织管理。本文方法在康定2号铁路隧道BIM模型数据中得到验证,结果表明能有效提升铁路隧道BIM模型在GIS环境中的表达效率。GIS and BIM integration is a must-have technique to the railway tunnel engineering informatization.It is becoming increasingly difficult to achieve high-performance visual analysis in GIS of tens of kilometers of railway tunnel engineering due to the increase of the amount of massive long tunnel component-level BIM data.Currently,the majority of high-precision and complex railway tunnel BIM is expressed by parameters.In GIS models,the amount of geometric data increases significantly.In addition,there are inconsistencies in the component scale and hierarchy of the railway tunnel's BIM data in the general GIS standard,making it difficult to realize refined management and efficient visual expression of railway tunnel engineering scenarios.This paper proposes a semantically-constrained railway tunnel BIM lightweight method to establish LOD(multiple level of details)description rules for BIM of the railway tunnel,and to form LOD data with component semantic information by extracting and simplifying component geometric information,thereby optimizing organizational management of LOD.Finally,the method's efficiency is tested by BIM data from Kangding No.2 railway tunnel.We found that the method effectively improves BIM data expression in the GIS environment.

关 键 词：铁路隧道BIM模型 网络地理信息系统 语义约束 轻量化 多细节层次 

分 类 号：P2[天文地球—测绘科学与技术] TU196[建筑科学—建筑理论]