Research On The Application Of BIM Technology In The Shape Design Of Non-overflow Sections Of Gravity Dams

With the iteration of information technology,the application of computer technology in engineering has made great strides and has led to the optimization of engineering design methods.Traditional gravity dams are designed using hand calculations and two-dimensional drawings,which are computationally intensive,and the design results are in the form of drawings and documents,with no way to ensure the effectiveness of the results and a large number of modifications in the event of engineering changes.As society’s demands on project quality and design cycles increase,gravity dam design needs to find new breakthroughs.The widespread use of BIM technology and three-dimensional models has provided new ideas for solving this problem and has given direction to the change from two-dimensional to three-dimensional design of gravity dams.3D design can make up for the shortcomings of 2D design,such as reducing the workload,shortening the design cycle and improving the efficiency of gravity dam design.This paper proposes a BIM technology-based design method for the body shape of non-overflow dam sections of gravity dams.The gravity dam design function is developed in the Revit platform,and the non-overflow dam section panel window program is improved.The overflow dam section profile model is used for slip stability and stress analysis to design a suitably sized profile according to the needs of the gravity dam project design.The information model allows for schedule planning and construction simulation.When there are changes to the project,the model can be modified directly for redesign and simulation,and the quantities and estimates generated by the model can be changed in real time.Model creation,model design and model use are all integrated.The main study elements of this paper includes the following.(1)Gravity dam design programmatic: secondary development of Revit using C#language,development of Revit platform-based gravity dam design tab and non-overflow dam section body design panel function,writing gravity dam non-overflow dam design form program,including body design,load calculation,slip stability coefficient calculation,stress analysis and optimization.(2)Gravity dam design program engineering application: apply the design program to the Luo Ning Dashijian gravity dam project,first draw up the profile size,establish a parametric non-overflow dam section dam profile project.In the Revit project,the profile design is carried out directly: click on the non-overflow dam design of the gravity dam,enter the interface design of the non-overflow dam section,click on the Get Properties button of the form to obtain the profile size parameters,select the working conditions for load calculation,slip stability calculation,stress analysis and optimization parameters,and calculate the non-overflow dam section design to meet the specification requirements.It proves that the programmed design of gravity dam can reduce the calculation volume of engineering design and improve the design efficiency.(3)Establishment of parametric gravity dam model simulation verification: According to the results of the gravity dam body design applied to the Luo Ning Da Shijian gravity dam project,the concrete gravity dam was constructed and divided,a parametric family library was established,and the gravity dam model was assembled.Civil3 D was used to process the topographic map,generate the terrain in Revit and complete the model.After the model was completed,the BIM model + 4D construction simulation technology was used to track the progress plan of the model as well as the construction simulation.The modified model and the drawings generated from the model can guide the construction on site and improve the construction efficiency.