Research on Erection Scheme of Small Radius Long Span T-beam Based on BIM
In order to solve the problems such as great difficulty in the erection of super small radius precast T-beams,high safety risks,limited space location,and the inability of conventional bridge erectors to erect beams,a study on the optimization of super small radius T-beams erection scheme based on BIM virtual simulation was carried out.First,BIM technology was used to establish LOD400 high-precision models of bridge structures,bridge erectors,beam carriers,temporary structures,and other components,and secondly,BIM technology was used to make use of the characteristics such as intuitiveness,diagrammability,and simulation,the feasibility,superiority and safety of various erection schemes are analyzed by 3D visual simulation.Through the research of different schemes under multiple limit states,the optimal scheme is determined,and the structural dimensions and relevant parameter requirements of the bridge erecting machine are determined according to the simulation analysis results,so as to guide the manufacturer to produce the bridge erecting machine to meet the requirements of beam erecting.Finally,a set of methods and processes for comparison and optimization of multiple schemes using BIM virtual simulation technology are summarized.Relying on the erection of prefabricated T beams on the B ramp of Xi'an Interchange of Guanxin Expressway,the comparison and optimization of the erection schemes of super small radius prefabricated T beams were carried out.It was found that the method had the advantages of strong scheme enforceability,safety risk pre positioning,real-time linkage of structural checking,visualization of technical disclosure,etc.,which verified the feasibility and superiority of BIM simulation technology in guiding the preparation of the erection scheme of super small radius curved girder bridges.Assisted to solve the problem of T-beam erection in this project.This method can provide a reference for the erection of super small radius precast girder bridges under the condition of large topographic relief and confined space.
BIM technologyultra small radiusprefabricated T-beamvirtual simulationscheme optimization
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