| The bridge swivel construction technology is the construction method of the bridge in the specific area construction,such as crossing the steep canyon,crossing the existing railway line and other places.The technology is widely used because of its good construction face,shortening the construction period,ensuring the safety of the workers and the normal operation of the lower cross railway.With the increasing number of bridge swivel projects,its technology shows wide application and development prospects,and has the value of research and promotion.The bridge swivel construction technology was formally developed in 1940 s,and then gradually applied.Compared with other hanging basket cantilever cast in place bridge construction technology,this technology has more than one step swivel process,and it is a relatively new bridge construction technology.Bridge swivel technology has been studied and perfected in many practical projects.With the continuous progress of BIM technology and structural simulation technology,the bridge swivel construction technology is maturing step by step,and the bridge structure is developing to large span,thin section and prestressed direction.The bridge construction work scheme is more scientific,efficient and economical.According to the Chongli railway viaduct bridge Zhao Chuan Zhen large projects,the use of BIM technology and Midas,ANSYS finite element analysis software of the curved girder bridge cantilever,twist,the whole process of stress and deformation of the simulation,the stress and the security and stability of the bridge structure research,put forward the construction control indexes.At the same time,BIM technology is used to carry out a number of construction guidance work,scientific management of the bridge project is realized,and the application of BIM technology and virtual simulation technology in the field of bridge engineering is effectively improved.Through the combination of the bridge project,the following work is studied:1,In the preparation of Guyuan railway viaduct bridge Zhao Chuan Zhen large construction project monitoring report,framework construction monitoring system flowchart,describes the principles and methods of analysis.According to the requirements of the monitoring report,the bridge alignment,stress,pier settlement,temperature and other monitoring projects site distribution and measurement,data analysis work.2.The construction stage model is established by using MIDAS,and the mechani cal characteristics of the construction process,the turning process and the girder of the bridge are analyzed.This chapter uses the finite element software MIDAS/civil and A nsys Workbench of the new Chongli railway swivel bridge construction and Zhao Chu an Zhen ball hinge cantilever continuous beam bridge is carried out by force analysis of the whole process.Through the MIDAS software in the analysis of the structure,ob tained before the swivel concrete girder in full cross-section compression,the maximu m axial force is 104763 KN,the lower edge of the tension arm end,the maximum ben ding moment in cantilever section,its value is 75946.30 kN.m;the concrete girder brid ge stage in the whole section compression axial force,the maximum value is 112645 KN moment,maximum value is 56953.86 kN.m,the negative moment and mid span,t he maximum negative moment is-29058.1 kN.m.The pressure stress on the upper an d lower edge of the main beam is less than the standard value of the compressive stren gth of C50 concrete.Through the analysis of spherical hinge structure by Ansys Work bench software,the maximum stress of ball joint is 127.74 MPa,the maximum stress o f concrete and pier cap concrete is 27.26 MPa,and the stress value is less than the stan dard value of steel and concrete material strength.Through the virtual simulation calc ulation,it provides the reference basis and effective data for the construction and mea surement and control of continuous beam bridge,and in order to guide the constructio n of continuous beam.3,Referring to related literature,summarizes the domestic and foreign bridge BIM technology research and development.Combined with the specific circumstances of the project,the bridge is modeled by BIM technology,and the 5D project management is carried out.According to the requirements of the construction site,the BIM model is used to check the collision between the steel bar and the prestressed corrugated pipe,and the position of the vibrator of the 0 block is adjusted to ensure that the pouring vibration tube is not collided with the prestressed pipe as far as possible.On the BIM5 D platform,the overall planning and adjustment of the construction schedule,construction simulation animation display,mobile phone applications in the field,and so on,to further promote the implementation.BIM technology has been applied in this project.Optimization control of quality,safety and schedule in bridge construction process.By comparing the housing construction project,summarizes the current BIM5 D platform bridge project management malpractice and application problems,and summarizes the next step BIIM+ Swivel Construction Application method.In this paper,the cast in situ swivel continuous beam as the background,combined with the specific construction design scheme,through numerical analysis software to verify the key construction link of the bridge mechanical properties and stability.And relying on the concept of BIM technology,with BIM5 D management platform to co-ordinate visual construction information management,through specific application shows the advantages of BIM technology applications.The application of Chongli railway viaduct bridge Zhao Chuan Zhen large project BIM+ virtual simulation technology.Keywords: Bridge swivel,construction monitoring,numerical simulation,virtual simulation,BIM Technology。... |
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