Application Research Of Bim Technology In Asphalt Pavement For Full Life Cycle

During past decades,BIM technology has been widely recognized by the worldwide industry.However,the current road field in learning and introducing of BIM technology also had to face numerous problems.First of all,the design of expressways includes not only linear design,but also pavement design.Pavement design is inseparable from structural analysis,while the current BIM environment lacks this synchronized function of asphalt pavement during the design stage.On the other hand,in the process of construction,BIM is used for dynamic simulation and process display.However,BIM-based visual construction quality control and corresponding quality early warning system are rarely established,which lead to difficult to deal with frequent changes and quality issues.In the maintenance stage,due to the large amount of disease data as well as the difficulty of information storage,and the time-consuming text retrieval,it is hard to establish a reasonable and effective cost estimate.In addition,there is still a lack of a complete and systematic information platform for data integration,model archiving,and unified management throughout the life cycle,making it difficult to manage the expressway in the later period of service and difficult to retrieve data.Therefore,in response to the above mention problems,based on the actual needs of the current road BIM technology development,this paper has carried out systematic research from four aspects: design phase,construction phase,maintenance phase,and building information platform.The main research contents are as follows:(1)Research of BIM-based parametric modeling and structural analysis of typical asphalt pavement was carried out.First,Revit was established as the main modeling software,and the foundation model of asphalt pavement was created by establishing a metric conventional model family.Then this study summarizes the typical domestic asphalt pavement combination form,and completes the three-dimensional structure design of the typical asphalt pavement through parameter adjustment of the basic model.Based on this,the secondary development of the BIM software was carried out by using Dynamo programming,and the automatic design of the three-dimensional route in BIM was completed.Then the structural analysis formula is written into the Dynamo program by Python language,and the design parameters are connected in series with the structural analysis parameters,which realizes the synchronization of design and structural analysis in the BIM environment.In addition,in order to obtain more accurate structural analysis results,this research further proposes to establish a data transfer interface.The parameterized BIM model is imported into ABAQUS in a data file format,and the accurate analysis of the typical asphalt pavement structure based on BIM-ABAQUS is realized by calculating with the aid of external finite element software.(2)The BIM-based asphalt pavement construction process simulation and key parameter integration research are carried out.First,Dynamo programming is used to create a node program that can automatically read data from Excel to complete the creation of the geological model,then the site model layout,and finally the simulation of asphalt pavement construction is completed through Navisworks.Next,based on intelligent compaction technology,a BIM-based asphalt pavement compaction quality evaluation system was established.Firstly,the compaction parameters are divided into regions by the minimum standard deviation through MATLAB,and the BIM-GIS-based asphalt pavement compaction quality monitoring system is established with representative compaction parameters,which realizes the quality parameters obtained by intelligent compaction replace the traditional Excel expression that is difficult to read with a large amount of data with intuitive and visual image expression.Then,using the analytic hierarchy process,the visual evaluation program of asphalt pavement construction quality was established through C# language programming in the way of expert scoring.Finally,this article focuses on the typical gradation segregation diseases in the construction of asphalt pavement as the research object,combined with image processing and adopts the Gini impurity model to establish an image recognition-based gradation segregation disease parameter acquisition.And the image recognition results are fed back to the three-dimensional BIM model to establish an early warning prompt.After that,a BIM-based early warning system for the quality of asphalt pavement construction segregation is established.(3)Aiming at the insufficient application of BIM technology in the maintenance stage,a research on BIM parameterized integration and cost model construction of asphalt pavement diseases was carried out.In order to construct a parameterized disease model based on BIM,firstly,Context Capture was used to reconstruct the 3D model of the asphalt pavement disease using 3D reconstruction technology.On the other hand,for local diseases,using the function of Revit to establish a basic parameter model,a three-dimensional disease model is directly established in the BIM model and then the disease texture mapping is performed to realize the fine modeling of the disease.Then import the completed parameter model into the overall road model to realize the direct measurement and acquisition of disease size parameters in the BIM model.At the same time,attention points are established and other key information of the disease is recorded in detail for later query.The next step is to establish a maintenance cost estimate based on the BIM model.First,the average rate of different maintenance measures is established based on the maintenance data of Jiangsu Province over the years,and then the maintenance cost estimation procedure is established through the disease information in the three-dimensional road model.Then combined with the highway technical condition assessment standards and maintenance design specifications,the above-mentioned maintenance cost estimation procedure was optimized with the highway technical condition assessment indicators such as SRI,RQI,PCI,RDI,and finally established a data-based combination of three-dimensional disease images decision-making model for autonomous maintenance of asphalt pavement.(4)Carried out the research of BIM-based integrated operation and maintenance information platform for construction,management and maintenance.A data collection model for the entire life cycle of asphalt pavement was established,and an information expression method based on the IFC format was established for the collected data.On this basis,through DW webpage programming software,an integrated operation and maintenance management platform based on full life cycle BIM data collection was established.The main part of the information platform includes a password-encrypted window login interface,an overview of the overall information of the platform homepage and major catalog labels,a video and model file storage and query area,and a data file detailed information classification area.