Existing bridge quick BIM modeling system and method

Abstract

The invention discloses an existing bridge quick BIM modeling system and method. The three-dimensional laser scanning technology serves as a bridge three-dimensional geometric data acquisition tool, and the limitation of passive ranging in traditional close-range photogrammetry, namely limitation of natural light conditions, is overcome. In actual application examples, by comparing a BIM model built through three-dimensional scanning and an actual building, it is found that the similarity between the BIM model and the actual building can reach 90% or above. A full-color-point cloud model is obtained through the three-dimensional scanning technology, a vivid and fine virtual model can be generated through three-dimensional entity modeling software processing, the method can be used for webpage real-time publish and sharing, and the cooperative work efficiency is improved. The whole BIM modeling process is convenient, quick and precise, as for small-and-medium-sized bridges, it takes a few hours from field work scanning to building of the whole BIM model, and model errors can be controlled at the millimeter level.

Description

technical field [0001] The invention belongs to the field of rapid modeling of large buildings, and more particularly relates to a rapid BIM modeling system and method for existing bridges. Background technique [0002] For some cities with many rivers, lakes and abundant waters, with the continuous development of the city, large-scale bridge construction will bring severe challenges to future operation and management. In order to support the digital operation and maintenance of bridges in the region, make bridge management more scientific, rational and standardized, strengthen the effective monitoring and management of traffic elements including people, vehicles and other facilities, and improve the shared utilization of limited resources, It is necessary to establish a BIM model database covering all bridges in the area as an important basis for supporting bridge maintenance throughout the operation period. [0003] Building Information Modeling (BIM) technology has the a...

AI Technical Summary

Problems solved by technology

For example, the AutoCAD two-dimensional drawing modeling drawing method is only suitable for BIM modeling of bridges that retain drawings, and cannot be applied to bridges that have lost drawings due to a long time or other reasons.

Remote sensing and geographic information system technology (GIS) are mainly used in large-scale spatial data measurement, such as topography, landform measurement, agriculture, and forest night monitoring. It covers a wide range, but its accuracy is poor, and it cannot meet the requirements of fine bridge modeling. Require

Although 3D holography technology can obtain more precise geometric dimensions of space objects, it lacks corresponding processing algorithms for engineering modeling applications, and it is not conducive to the flow of image data among various softwares. It has poor compatibility and is difficult to use. 3D geometric information for BIM modeling

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