BIM Modeling Of CRTS ? Slab Ballastless Track Research And Implementation

In recent years,with the continuous application of BIM Technology in various engineering projects,it has brought huge economic and social benefits.Rapid and accurate creation of ballastless track model is the premise of BIM Technology's effective application in track engineering projects.Compared with general building structure,ballastless track is more complex and fine,and rail lines often hundreds of kilometers or even thousands of kilometers,modeling work needs a huge amount of work,and loading model takes a long time,and requires high performance of the computer,which brings in practical operation A lot of difficulties have seriously affected the work efficiency.In view of the difficulties existing in the modeling of ballastless track,this paper takes CRTS ? slab ballastless track as the research object and puts forward the concept of track structure unit.Based on the parametric modeling method,C Sharp programming and Revit secondary development technology,the rapid modeling method of ballastless track based on BIM is studied,and the rapid modeling system of CRTS ? slab ballastless track is established.The system only needs the user to import the basic line design information,and can quickly generate the track BIM model of the corresponding mileage segment according to the track layout parameters and the input mileage segment selected by the user.Users can also create track models one by one in batches,reducing the workload of modeling,reducing the performance requirements of the model on the computer hardware equipment,thus greatly improving the work efficiency.The main research results of this paper are as follows:(1)Taking CRTS ? slab ballastless track as the research object,this paper puts forward the concept of track structure unit,deeply analyzes the parameters of track structure unit,and studies the creation method of track structure unit family based on Revit software,so that the track structure unit family can adapt to the characteristics of track structure at different positions of the line by adjusting the parameters.(2)The method and algorithm of obtaining instantiation information of track structure element family are studied.On the basis of the known design information of railway lines,this paper studies the acquisition methods of railway line center line information,track structure layout scheme information,track structure unit positioning information,track structure unit adjustment parameters in curve section,and designs program algorithm,which can quickly obtain the instantiation information of track structure unit family according to the known design information of railway lines.(3)This paper studies the method of quickly building the BIM model according to the instantiation information of the track structure unit family,and develops the CRTS ? slab ballastless track rapid modeling system,which realizes the real-time and rapid generation of the ballastless track fine model according to the needs of users.(4)Taking the actual project as an example,based on the CRTS ? slab ballastless track rapid modeling system,this paper describes in detail the process of quickly creating the ballastless track BIM model according to the needs of users.The case study shows that the theory and method proposed in this paper are feasible.