Monitoring Method of Overall Deformation of Expressway Tunnel based on Slice Coordinates of Inner Wall Point Cloud
Because of the complexity of highway tunnel structure,it is easy to produce transverse and longitudinal deformation in the use process,resulting in low safety of highway tunnel.For this reason,a method for monitoring the overall deformation of expressway tunnels based on the slice coordinates of point clouds on the inner wall is proposed.The projection plane method is used to layer the point cloud information on the inner wall,so that each segment of the point cloud is mapped to the reference plane of the center position,and the point cloud information on the inner wall is extracted.The least square method is used to fit the highway tunnel plane,and the grid interpolation is used to calculate the interpolation of each point cloud.Through the change of the grid interpolation at each time point,the deformation related quantity of the tunnel is judged,and the deformation position is obtained according to the location of the grid plane,Complete the overall deformation monitoring of expressway tunnels.The experimental results show that the amount of monitoring information and the calculation time of the proposed method are 9921 and 6.21s respectively,which can sensitively perceive the subtle tunnel deformation.The monitoring efficiency is the highest,and the method has high practicability and effectiveness.The method can effectively improve the safety of highway tunnel traffic operation in various cities.
slice coordinates of inner wall point cloudtunnel deformation monitoringcross section fittingdimension reduction of inner wall point cloudgrid interpolation
NETL
NSTL
万方数据
