Development And Application Of Highway Tunnel Surrounding Rock Grading System Based On Mobile Platform

The surrounding rock classification of highway tunnel is the basic work to determine the stability of the surrounding rock of a highway tunnel and its supporting structure,but the traditional method of surrounding rock classification has the problems of difficult parameter acquisition and long period.Therefore,based on the digital image processing technology,this paper adopts the image segmentation algorithm to analyze the images of the palm surface,and can quickly obtain the sub-classification results of surrounding rocks by combining the rock hardness,groundwater development and in-situ stress parameters selected qualitatively.Based on the integration of the above research,the Android tunnel platform surrounding rock classification system was developed on the Android studio platform,and the following main research results have been obtained:(1)Analyze the common features of rock mass images,and determine the type of rock and soil by extracting the main color of the image and combining the geological distribution;adopt median filtering for processing,combine Sobel operator and Otsu algorithm to perform image segmentation and extract crack feature parameters.At the same time,calculate the rock mass breaking coefficient based on the overall pixel value of the image,and establishe the corresponding relationship between the crushing coefficient and the integrity of the tunnel face.(2)Develope the road tunnel surrounding rock grading system on the Android side.The system has a friendly interface and simple operation.It can pre-process the problems that may occur in various operations,and does not need to use other equipment to obtain surrounding rock parameters.Realized surrounding rock classification on the mobile terminal efficiently and rapidly,and improved the accuracy of surrounding rock classification,which provides reference and basis for the selection and implementation of the subsequent support methods..(3)In addition to using the grading method based on the crack image recognition established,the system also includes the BQ grading module in the specification.The user can automatically calculate the surrounding rock grade by inputting the corresponding surrounding rock parameters with reference to the specification,and the former Compare for your reference.(4)Apply the system is to the tunnels such as Naqiu and Junetian,which have been constructed,and the classification results of the BQ method used in the standard are compared to verify the accuracy of the classification results of the system,which reflects the actual operation of the system.The value of the application.