| The geological disaster accident of tunnel excavation seriously threatens the safety of life and property,and the transient electromagnetic method is often used for advanced detection.Transient electromagnetic advanced detection data volume is large,the types are many and complex,and the relevant data management and analysis software platform is urgently needed to solve the fine management of its classification,search,result graph and analysis report.In order to solve the above problems,on the basis of the advanced detection array anti-flux transient electromagnetic instrument developed by our laboratory,the cloud data management and analysis system for the advanced geological detection and prediction of the tunnel is developed.In this paper,the electromagnetic finite element simulation software ANSYS Maxwell is used for simulation to verify the feasibility of the array anti-flux method.The system includes control analysis software and cloud data storage functions.The control analysis software is developed based on the Qt framework.The control software can be loaded on a portable tablet and connected to the hardware instrument via WiFi to separate the hardware device and the upper computer control software.In order to achieve reliable data transmission,a communication protocol is designed,including header format,collection packet,stop packet,response packet,and data transmission packet.The upper computer software can control the relevant parameters and collection work of the transient electromagnetic instrument,and at the same time save the collected data files locally in accordance with the prescribed standardized format.The cloud data management and storage system uses a database based on the B/S architecture.The system is divided into two permissions: ordinary users and administrators.Ordinary users log in to the client and can upload,view,and download the collected data files.Project files,data files,and drawing files can be classified and archived according to the file format.At the same time,they can quickly and accurately search based on the project name,file type and other information.In the authority management of the system administrator,the RBAC authority management design and the Shiro security framework are added to realize the user authority assignment and data grouping management.By assigning users' operation authority to different data,the problem of hierarchical data management is solved.Add data categories to the client settings to solve the problem of data archiving and classification.This paper carries out standardized storage and processing of the data collected by transient electromagnetic method,and imports the instrument data into the analysis software to decode the data format,extract and filter preprocessing of the survey data.Through data statistical analysis and fitting,the secondary field extraction of transient electromagnetic field data and the secondary field signal filtering processing can be completed.Write a Visual Basic script program to realize automatic data import,complete apparent resistivity calculation,time-depth conversion and rapid generation of inversion images.After the system is developed,test the control module parameter settings,waveform display,and apparent resistivity imaging function of the system.At the same time,the cloud service login function,data upload and download,and data retrieval functions are tested.The test results show that the system is functioning.The expected goals have been achieved and the standards for field application of the project have been met.Subsequent on-site survey applications were carried out.At the on-site road tunnel excavation site,the survey results map was confirmed by drilling geological data to meet the tunnel's advanced geological detection and forecast requirements. |
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