Abstract
The spatial conflicts in the construction of high-speed railways not only reduce project efficiency, but also lead to serious accidents. To address these key issues, this paper presents a dynamic simulation method for constructions processes based on a virtual geographic environment. This approach can facilitate the identification of conflicts in the construction scheme through accurately expressing and analysing the intricate spatio-temporal relations among railway facility components, construction equipment and the surrounding environment. First, a high-precision virtual geographic scene in which the construction process and methods can be visualized and modelled intuitively is established with terrain, imagery, and engineering 3D models. Then, the overall construction processes can be accurately simulated by a sequential display of the railway components and the behaviour of construction equipment. To simulate the behaviour of construction equipment, the linkage relations between each joint of construction machinery are accurately modelled and animation control parameters are extracted. Finally, a construction simulation of a high-speed railway bridge was performed, and the experimental results show that the proposed method can provide a scientific basis for the optimization of complex engineering construction schemes, safety hazard assessments, and related full life cycle tasks.
Highlights
High-speed railway construction is a system-based project that includes many complex construction processes and usually requires a low-cost, high-quality, and short-duration construction period with adequate safety
This paper presents a dynamic construction simulation method in a Virtual geographic environments (VGEs) that can reflect the construction process of high-speed railways and depict the complex spatio-temporal relationships between construction elements and the surrounding environment
This paper introduces a dynamic 3D simulation method for complex high-speed railway engineering construction based on VGEs, and the following conclusions are summarized: (1) Multiscale representation of railway environments and dynamic 3D simulations of construction process are achieved, and they greatly improve the overall and local precise control of project management
Summary
High-speed railway construction is a system-based project that includes many complex construction processes and usually requires a low-cost, high-quality, and short-duration construction period with adequate safety. The existing construction simulation methods usually use three-dimensional surface models or BIMs (building information models) for the simple analysis and visualization of collision detection and virtual assembly [2,3,4,5,6]. Such methods only focus on the construction and assembly process of railway components and ignore the global relations among construction equipment and the surrounding geographical environment. For a specific complex local construction process, a joint linkage mechanical model is developed to flexibly simulate the dynamic working process of construction machinery
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