Layout Optimization Of Gravity Dam And Application Of BIM Family Library

In a water conservancy hub,the rationality of the entire hub mainly comes from the layout of the hub plan.In the hub design,it is necessary to select an optimal layout plan based on comprehensive evaluation of multiple hub layout plans.The previous layout plan was directly selected through various quantitative indicators and the subjective suggestions of decision makers,which was not rigorous from a scientific point of view.In this paper,the fuzzy comprehensive evaluation of the non-quantitative indicators of the important components of the hub based on the algorithm of matlab,analyzes and obtains a more scientific and rigorous optimal layout plan of the hub.In the engineering design stage,traditional water conservancy projects are based on 2D CAD drawings.The results are not intuitive,the design efficiency is low,and the design process is cumbersome.The application of BIM technology makes up for the shortcomings of the previous 2D drawing design,This article is based on Revit,The three-dimensional visualization layout of the water conservancy project,with the visual management of the design plan and simple terrain processing capabilities,enables the project manager to more intuitively understand the expected results of the project at the beginning of the project;but in the case of Revit,the family in the field of water conservancy project The establishment of the reservoir is still in its infancy,leading to the cumbersome 3D design of water conservancy projects.In this paper,a part of the 3D parametric family library suitable for general gravity dam water conservancy hubs is established,which greatly improves the design efficiency of this type of water conservancy hub.Revit software can be more conveniently used in domestic water conservancy projects.It must be based on the prerequisite of Revit’s secondary development.Even if the engineering quantity calculation of Revit software itself has reached a fairly accurate level,the generated engineering quantity schedule cannot be compared.Good for making project budget estimates in domestic projects.This paper explores the calculation of engineering quantity based on Revit,and develops the engineering quantity calculation plug-in based on Revit by programming,which improves the extraction efficiency and accuracy of Revit engineering quantity.By exporting the engineering quantity list to an Excel table,it solves some problems in China.In the project design,the BIM software has low applicability,is not standardized,and does not meet domestic standards.The specific research is as follows:(1)Based on the Matlab fuzzy comprehensive evaluation method,from the perspective of non-quantitative indicators,the optimal layout of four parts: the selection of dam type,the selection of dam materials,the form of flood gate and the form of ecological discharge of the water conservancy project is evaluated and analyzed.Taking the Sanwan Hydropower Project as an example,the different opinions of the Sanwan Hydropower Project experts on the non-quantitative indicators in the 4 key project layout plans were collected through questionnaire surveys,and the evaluation items of each project layout were summarized and scored.After fuzzy comprehensive evaluation,the best choices of the four layout schemes of Sanwan are obtained.(2)Based on the parameter information function of Revit,a parametric family library suitable for gravity dam water conservancy projects such as gravity dam sections,diversion dam sections,power station turbines,pumping station water pipelines,gates,etc.are created.Applying it in the Sanwan Water Conservancy Project,by changing the parameters,a 3D component suitable for the Sanwan Water Conservancy Project was created;Revit was used to sublimate the power plant and pumping station parts into a 3D model based on traditional CAD 2D drawings,and directly in Revit The layout of the small ecological flow power generation unit was established;the models and components were linked together to realize the three-dimensional visual simulation of the overall layout of the Sanwan Hydropower Project.Finally,the three-dimensional simulation animation rendering of the Sanwan Hydropower Project was made based on Lumion.(3)Based on the secondary development of Revit,programming has developed a plug-in that can be applied to Revit to directly calculate the engineering quantity.the structure of the water plant is more complicated and the engineering quantity extraction is more complicated than other parts of the dam.By applying the development plug-in to extract the engineering volume of the factory building wall in the Sanwan Water Conservancy Project,the functions and advantages of the plug-in are verified.