A Deformation Monitoring Method for Underground Excavation Structures in Subway Construction Projects Based on LiDAR Multi-Objective Imaging Technology
During the excavation process of subway engineering,the balance of the original soil mass will be disrupted,causing disturbance to the soil mass and also the deformation of the structure and the sur-rounding strata during subway construction.Therefore,it is necessary to monitor the structural deformation of subway engineering.Therefore,based on multi-objective imaging technology,the LiDAR monitoring method for deformation of underground excavation structures in subway construction projects is studied.During the excavation process of the subway,the normal curve expression method is used to express the transverse and longitudinal deformation forms of the underground excavation structure during subway con-struction.The height difference threshold is defined in LiDAR monitoring by comparing the deformation expression with mathematical morphology theory,multi target imaging technology among multiple monito-ring points is selected to obtain the deformation of the underground excavation engineering structure and to complete the method design.The experimental results show that the monitoring results of the proposed method are consistent with the measurement instrument data,and can effectively monitor the deformation of the top beam and the deformation of the transverse support beam,which has practical value.
subway construction engineeringstructural deformationLiDAR monitoringmulti-objective imaging technology
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