Parametric Design Of Foundation Pit Structure Based On Revit

With the continuous development of social economy,in addition to the traditional space on the ground,urban space,underground,seabed and sky are also gradually brought into the scope of development.The complexity of foundation pit engineering is also getting higher and higher,which puts forward higher requirements for designers of foundation pit engineering.The emergence of BIM technology provides a new method to solve the above problems.Building Information Modeling(BIM)is a new method to design,construct,operate and maintain the project.At present,BIM technology in China is mainly applied to project design,3D modeling,engineering optimization,collision detection and other aspects,but the application of BIM technology in establishment and calculation of Foundation Pit Engineering Model is not perfect.In order to improve the efficiency of foundation pit engineering design,this paper will use Microsoft Visual Studio development software,based on Autodesk Revit platform,to carry out secondary development of parametric modeling and calculation functions of foundation pit engineering.At the same time,code development is carried out for functions such as calculation and reinforcement of support structure,output of engineering drawings and statistics of foundation pit quantities.The main research contents are as follows:(1)Firstly,this paper studies the application status of BIM technology in foundation pit engineering,as well as the shape structure and application scope of various supporting structures.The secondary development is carried out under Revit,the mainstream modeling software of BIM,to supplement the supporting structure family library of Revit,which is convenient for users to insert supporting structures on foundation pit models.(2)I learn C# language and Revit API help documents,and use the methods introduced in Revit API to carry out parametric design research on foundation pit geological layer model.Users only need to input the calculation parameters of foundation pit positioning points and soil layers in the development window interface,and can directly generate the foundation pit family model in the project.(3)Consult the literature and compare and summarize various methods for calculating soil pressure.According to Coulomb's earth pressure calculation theory,the earth pressure around foundation pit engineering is automatically calculated.(4)Summarize and analyze various calculation theories of row pile supporting structures.In this paper,the equivalent beam method will be used to estimate the anchorage length,calculate the reinforcement,check the cross section,check the reinforcement and so on.(5)The function of quickly generating foundation pit engineering drawings is realized through the data transmission between the C# window and Revit project.At the same time,the quick labeling plug-in for steel bars and the statistical plug-in for foundation pit engineering quantity are developed.It truly realizes the integration of foundation pit engineering modeling.(6)Improve the integrated plug-in development system.The practicability of the whole plug-in system is verified by the foundation pit model of an actual engineering project.The research in this paper can realize the integration of parametric modeling,model parameter addition,structural calculation,structural check,automatic reinforcement,automatic reinforcement labeling,automatic drawing and automatic statistics of engineering quantity for foundation pit engineering.