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  ZhangJiHuai Railway Project - The Use of a New Innovative System for Scanning in a Drill and Blast Excavation

  The Zhangjiajie-Jishou-Huaihua (hereinafter referred to as ZhangJiHuai) highspeed railway project has started its construction since 12th December 2016. The Jishou Tunnel, as an early start section and key control project of the line, first introduced tunnel scan system which has been widely used on the entire project. Tunnel scan system integrates 3D laser scanner and smart computer software, which makes it possible to collect, process and output scan data in real-time on the job-site. The system provides a comprehensive solution of survey, data analysis and documentation for tunnel construction works. The principle of the system is collecting high-precision, high-density spatial and image data of point clouds on the tunnel surface of complex objects geometry through non-contact high-speed laser scanning measurements. With intelligent software "Amberg Tunnel", the data acquisition and analysis can be streamlined and standardized, functions cover a variety of complex applications of tunnel measurements, including control survey of profile over-/under-break, undulation analysis of shotcrete lining, layer thickness analysis of inner lining concrete and tunnel imaging etc.. This paper introduces the background of the project and the application of Tunnel 3D Laser Scanning System on the project.

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