The Research On Some Problems Of Highway Bim Based On Civil 3D

With the rapid development of highway construction,it is urgent to improve the efficiency of engineering construction.The building information model(BIM)provides an effective way to realize the information exchange and sharing in the whole life of construction projects.However,the current BIM software is lack of support for route design decision information.Based on this,this paper puts forward the highway route BIM design tool,and makes an in-depth study on the application of BIM in highway route design.Based on the existing research at home and abroad,this paper summarizes the concept of BIM.It analyzes and defines the concept of highway BIM from five aspects,such as logic,spatial information organization,highway design process,construction environment,multi objective decision information support.The design method of highway as the research object,the traditional CAD should expand the parametric modeling,design object attribute information and integrated evaluation information and other functions,to meet the BIM level in the design requirements,and then put forward the idea of technology BIM design tools development road.Based on the AutoCAD Civil 3D platform,according to the demand analysis of highway route BIM technology tools,two BIM object models are developed by using VB.NET language.One of these models extends the Civil 3D design rule checking class library and establishes quantifiable linear design specifications in the information model.In the design process,the specification conflict information can be dynamically feedback in real time,and the design specification automatic check can be realized,which is helpful for the designer to make decision reference.The other model extends the non geometric properties of the design object.The running speed attribute is extended to graphic object,and the BIM model of highway speed is established.It can realize the function of speed calculation,real-time query and dynamic display,evaluate the function of information,and integrate evaluation into the design link,which is helpful to improve the design efficiency.In this paper,the theory and method of BIM applied to route design are studied preliminarily,and the design rule,BIM model and highway operation speed BIM model are constructed.The problem of information expansion and real-time feedback in the design process is studied,and corresponding tools are developed.The research results have improved the support level and depth of route design,and provided effective technical means for the application of BIM technology in highway route design.Further research can consider the whole life cycle of functional expansion.