地理坐标系下施工便道三维快速设计技术  

3D Rapid Design Technology for Constructing Access Roads in Geographical Coordinate System

作　　者：韩祖杰 HAN Zujie(China Railway Design Corporation,Tianjin 300308,China)

机构地区：[1]中国铁路设计集团有限公司

出　　处：《铁道工程学报》2019年第12期5-10,共6页Journal of Railway Engineering Society

基　　金：天津市科技计划项目(17YDLJGX00060);中国铁路设计集团有限公司重点课题(7217126,721801,2019KF222105)

摘　　要：研究目的:我国铁路所经之处多为人口稀疏区,既有道路难以满足原材料与废弃物的运输需求,常常依靠施工便道。为解决环境险峻处施工便道难以快速设计优化与直观展示的问题,本文提出一种地理坐标系下施工便道三维快速设计方法。研究结论:(1)地理坐标系与投影坐标系之间的转换关系,为参数计算与三维展示提供了前提;(2)施工便道参数化建模方法分为边坡类型判断、轮廓线获取、模型生成三个步骤;(3)设计成果以三维模型、矢量图形、填挖方量以及局部地形修改数据进行输出,并以图层化管理;(4)实现球面三维场景中施工便道模型一键生成与设计方案科学比选,模型的可编辑性能够对设计成果进行优化,地形填挖数据的局部更新与实时控制可实现地形分析的准确性和地形的快速修改与恢复;(5)在某铁路工程高陡边坡桥墩施工时,本文设计方法可实现施工便道方案比选与快速设计。Research purposes:Most of the railway routes in China are sparsely populated areas.It is difficult for existing roads to meet the transportation demand of raw materials and wastes,and often rely on construction roads.In order to solve the problem that roads in the steep environment are difficult to design and visualize,this paper proposes a parameterized modeling and design optimization method for generating road models in geographic coordinate system.Research conclusions:(1)The conversion relationship between geographic coordinate system and projected coordinate system provides a prerequisite for parameter calculation and three-dimensional display.(2)The parametric modeling method of generating road models includes the three steps of slope type judgment,contour acquisition and model generation.(3)We output 3 D models,vector graphics,fill and excavation quantities,and local terrain modification data,and manage them in layers.(4)This method realizes the one-click generation and scientific comparison of design scheme of generating road models in a spherical 3 D scene.The editability of the models can optimize the design results.The local update and real-time control of the terrain modification data realizes the accuracy of the terrain analysis as well as rapid modification and restoration of terrain.(5)During the construction of a rail pier on a high-steep slope,this method can achieve a comparison and rapid design for access roads.

关 键 词：坐标系转换 三维场景 施工便道 三维参数化建模 设计成果优化 

分 类 号：P208[天文地球—地图制图学与地理信息工程]