GE 3D Digital Technology In Highway Engineering Design Application Research

The study of highway route plan is usually based on two dimensional contour map.Usually,from the work to the preliminary design,the route scheme(corridor belt)will be preliminarily determined on the 1:5 million or 1:1 million and small scale topographic maps.After the route scheme comparison,only some quantitative lines will be used to map the large scale contour map of 1:2000 and so on,then the quantitative comparison is carried out on it,and the final confirmation is true.Set up the design route of the construction drawings.It can be said that valuable,technical standards and relatively low cost route options are determined in the early stage.The traditional design process and design method exist too much dependence on the topographic map,especially the traditional topographic map,which is dependent on the previous traditional design,and the shortcomings of the traditional topographic maps are particularly prominent: the lack of timeliness,the lack of information on the new buildings,the workshop,the road,the Airport,the station and so on,the large terrain change and the limited terrain map,which lead to the selection of the route corridor belt.Too arbitrary and subjective,it is easy to miss valuable schemes.At the same time,it has brought new challenges and challenges in the transition of the main road construction field into the local highway in China: poor construction conditions,shortage of funds,and lack of basic information.The importance of the early design is more and more prominent,because the function orientation of the project,the size of the main project and the scale of investment are basically determined in the early design,and the scope of the later change is often limited.How to break through the shortcomings of the traditional design is a problem worth studying.Google Earth(GE)has limitations for the traditional design method of the breakthrough,the traditional highway design based on line selection is to keep the Internet plus reform dongfeng.GE is a three-dimensional visual Earth software developed by Google company.It sets GIS information,such as satellite image,aerial photo and 3D ground model,on a three-dimensional model of the earth.It is different from the traditional GIS,the cost of GE is low,and the data is easy to collect,explore and visualize.This paper puts forward the research of route plan based on GE 3D digital technology,and extends it to the preliminary design and application of local highway project.The main research content and research results are as follows:1.Satellite image data,elevation data acquisition and downloading,and topographic map production;2.The characteristics and analysis of the practical project3,the application of GE 3D digital technology to the quasi preliminary design of local highway projects is compared.4.According to the characteristics of site exploration,it is analyzed and studied how to combine the results with the existing intelligent GPS equipment,which makes the efficiency of the site reconnaissance greatly improved,making it possible to make a quick survey of short time and multiple schemes,and make the efficiency of the exploration of the foreign industry greatly improved.At the same time,the scene is reconnaissance by the use of the 3D digital technology of GE.From two dimensional to three dimensional,three-dimensional space virtual discharge line makes the paper line and the actual field close together,greatly exclude many problems that will be found in the construction,the feasibility of the project has been greatly improved,and the economic benefit is considerable.