Calculation Method of Tunnel Lining Thickness and Concrete Usage Based on 3D Laser Scanning
In order to realize the construction process control of tunnel lining thickness,the calculation method of tunnel lining thickness and concrete usage based on 3D laser scanning point cloud was proposed.The 3D laser scanner was used to obtain the laser point clouds of the surface of tunnel excavation,primary support and second lining,then the point cloud data were converted and cut,the processed point cloud data were calculated and analyzed according to the proposed calculation method to obtain the calculate lining thickness and concrete usage.Field test shows that,the calculation method proposed in this paper can quickly get the calculate lining thickness and concrete usage,and determine the location of under-thickness or over-thickness.The calculate concrete usage of primary support and second lining differs from the actual amount by 0.90%and 0.59%respectively.The calculation method has a good accuracy and can be used for the control of lining thickness of tunnels in the construction period.
railway tunnelcalculation method3D laser scanningpoint cloudlining thicknessconcrete usagefield test
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