基于广义六面体的站场数字路基模型构建方法研究

Research on the modeling method of railway station digital subgrade model based on general hexahedron

建立具有连续空间表达的站场数字路基模型是实现站场专业BIM的基础核心问题。以站场的平纵横设计资料为基础数据,提出基于离散断面的数字路基模型的构建方法,实现站场下部结构信息模型的连续空间表达和高效的信息提取。建立邻接异构断面的构体原则,提出“广义六面体”法刻画不同构体状态下的空间封闭几何体模型;研究具有多级拓扑结构的体模型的剖切算法,实现了任意断面的快速提取;编制了原型程序,并利用独李北站算例进行测试分析,应用表明该方法可实现站场数字路基模型的高效构建与信息查询。

Creation of the railway station Digital Subgrade Model (DSM) with continuous spatial representation is considered to be the key technique of achieving BIM in railway station domain.This paper utilized the design results of planar,vertical-section and cross-section of railway station,the modeling method for railway station DSM based on dispersed profile was proposed,the continuous spatial representation of digitalized railway station model and corresponding efficient information extraction were achieved,the modeling principle for adjoined isomerism profiles was established,a method using “General Hexahedron” was proposed to illustrate the solid models under different modeling status,furthermore,the dissection algorithm for solid model with multi-level topology was studied,the fast profile extraction on any given plane was accomplished,a prototype program had been built,a case study of Dulibei Railway Station was conducted,the practicability of this method to achieve the efficient modeling and querying of DSM was validated.