BIM modeling method based on cantilever pouring construction of continuous girder of variable cross-section rigid frame bridge

Abstract

The invention relates to a BIM modeling method based on variable cross-section rigid frame bridge continuous beam cantilever casting construction. The BIM modeling method based on variable cross-section rigid frame bridge continuous beam cantilever casting construction comprises the steps of A, extracting the related property value of a main beam; B, extracting the corresponding coordinate value of the mileage pile number of each node according to road center line; C, establishing a file of main beam segmental node information according to the values obtained in the step A and B; D, establishing a main beam parametric family file according to the shape and design parameters of the cross section of the main beam; E, integrating an BIM model of a variable cross-section continuous beam, whichsatisfies cantilever casting construction segment, in a software according to the file of main beam segmental node information, which is established in the step C, and the main beam parametric familyfile, which is established in the step D. The BIM modeling method based on variable cross-section rigid frame bridge continuous beam cantilever casting construction has the advantages that the BIM model of the variable cross-section continuous beam, which satisfies cantilever casting construction segment, is automatically established by inputting parameters; the reverse modeling efficiency and accuracy are greatly enhanced; and the method can be used again in the follow-up similar projects so that the modeling time and difficulty are greatly reduced.

Description

technical field [0001] The invention relates to a modeling method, in particular to a BIM modeling method based on the cantilever pouring construction of a continuous beam of a variable-section rigid frame bridge. Background technique [0002] In the construction industry, using BIM (Building Information Modeling) software (such as Autodesk Revit, Bentley, Skechup, etc.) China's BIM modeling and design is still lagging behind. [0003] For the design of continuous rigid-frame bridges, the design route is usually a three-dimensional space curve, and the cross-section of the main girder is usually designed in the form of box-shaped, T-shaped, etc. with variable cross-section. During the construction, the construction unit used the cantilever pouring construction method to construct the main beam segments according to the structural diagram of the main beam segments provided by the design institute, and finally closed them. [0004] At present, there are almost no cases of br...

AI Technical Summary

Problems solved by technology

[0005] 1. The plane positioning of the main beam modeling adopts the two-dimensional plane design route as the base map, and the elevation positioning adopts the design height of the main beam. When the next similar project appears, the change of the bridge route information makes it difficult to parameterize the main beam structure positioning automatically Adaptive adjustment, this non-automation makes it difficult to update the model, so once the model needs to be changed, it can only be remodeled, which is less efficient

[0006] 2. The modeling of the main girder did not follow the design of the segmented model, resulting in the establishment of a model that did not meet the construction requirements in the application points such as the construction simulation of the overhanging method and the statistics of the segmental engineering quantity, and could not accurately guide the construction

[0007] 3. The main beam has a large number of variable cross-section segments, and the cross-section parameters change a lot, and it is divided into left and right widths, resulting in low modeling efficiency

[0008] 4. It is difficult to manually splice and locate a large number of beam segments, and there are many gaps and errors, which cannot meet the modeling accuracy and construction site requirements