复杂岩质高边坡三维地质建模及虚拟现实可视化

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Abstract In order to achieve three-dimensional geological modeling and visualization of complicated high rock slope engineering，a new method of three-dimensional geological modeling and visualization based on data structures of half-edge B-Rep and trimmed NURBS is proposed. Through making comprehensive analysis of common data structure for describing the space topology in the field of computer graphics，rapid and accurate establishment of topological relation of three-dimensional geological model for rock slope engineering with complicated geological conditions and cavern groups is achieved；and the high-quality geometrical data and topological relation information for the geological visualization of slope engineering are provided. By analyzing the development trends of computer visualization technology and the characteristics of virtual reality technology，the feasibility of applying X3D specifications based on desktop virtual reality technology to achieve the slope geological visualization is demonstrated. According to the flexible scene interaction and support for the complicated NURBS geometric models of X3D，the real-time dynamic visualization of slope three-dimensional geological virtual reality scenes and visual interactive query in virtual reality scene objects based on X3D is realized. Finally，taking the left abutment slope of Jinping I hydropower station for example，the applications of three-dimensional geological visualization based on virtual reality to slope excavation progress simulation，geological prediction，visualization query of slope geological conditions，geological analysis of slope safety monitoring section，visualization query and integrated analysis of slope safety monitoring system and so on are given. These may provide reference for the application of three-dimensional geological visualization based on virtual reality to other engineering fields.

Key words： slope engineering high rock slope engineering geology geological modeling virtual reality three-dimensional visualization

Received: 12 June 2010

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https://rockmech.whrsm.ac.cn/EN/Y2010/V29/I12/2385

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