Optimization of Disaster-reduction Route Selection in Geological Disaster-Prone Region Along the Sichuan-Tibet Railway Based on Virtual Reality: A Case Study of Luolong Station

doi:10.19657/j.geoscience.1000-8527.2021.014

Abstract

Abstract:

The frequent landslide and debris flow disasters along railway lines have obvious negative impacts on the railway construction and safe operation, and hinder social and economic development. During the railway route design process in mountainous regions, how to scientifically plan the line location and project scheme, and to assess the railway geological risk, has become a common concern to researchers around the world. Therefore, this paper introduces a visual simulation for railway disaster-reduction route selection scenarios in geological disaster-prone areas, on the basis of virtual reality (VR). The system first uses CAD, Sketch Up and other software to establish three-dimensional (3D) terrain environment model. According to the simulation results on landslide and debris flow disaster evolution along the railway line, the virtual railway model of the study area is built based on the Unity3D platform using 3Ds Max, Photoshop, and other software. Finally, the 3D visualization of virtual railway and terrain roaming is performed through the interactive Web interface design. Taking the Luolong station of Sichuan-Tibet Railway as an example, a variety of route schemes are established with this method. The results show that the established VR scenario has good visibility and smooth interactivity, which can fully assess the feasibility of construction and operation safety of the local mountain railway.

Key words: Sichuan-Tibet Railway, landslide, debris flow, disaster-reduction route selection, virtual reality (VR)

CLC Number:

P642

ZHOU Jie, DING Mingtao, HUANG Tao, CHEN Ningsheng. Optimization of Disaster-reduction Route Selection in Geological Disaster-Prone Region Along the Sichuan-Tibet Railway Based on Virtual Reality: A Case Study of Luolong Station[J]. Geoscience, 2021, 35(01): 92-102.

Figures/Tables 9

Fig.1 Location of the study area

Fig.2 Geomorphological characteristics of Chada No.1 debris flow gully

Table 1 Watershed characteristic parameters of Chada No.1 debris flow gully

沟道名称	流域面积/km²	主沟长度/km	平均坡降/‰	最大高程/m	最小高程/m	最大高差/m
察达1号	2.72	2.94	340.25	5 247.00	3 719.00	1 528.00

Fig.3 Proposed framework of railway disaster-reduction route selection (virtual scenario simulation) in geological disaster-prone areas

Fig.4 3D terrain environment model of the study area

Fig.5 Rendering output effect of hazard-bearing body model

Fig.6 Virtual simulation of landslide disaster evolution

Fig.7 Virtual simulation of debris flow disaster evolution

Fig.8 Design schemes of disaster-reduction route selection in geological disaster-prone areas

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