Study On Safety Prevention System Of Highway Tunnel Construction Under Complex Geological Conditions

Due to the status that safety prevention and control system of highway tunnel constructionunder complex geological conditions is not perfect, the paper takes the safety control of tunnelconstruction as an entry point of research,to build the safety prevention and control system of tunnelas the main goal, conducted a comprehensive and systematicstudy by means of numericalsimulation based on theory of finite element,system development based on B/S structure,fieldmeasurement and so on.1.The tunnel construction method and supporting parameters were optimized under complexgeological conditions by theoretical analysis, field testing and other means; Combined with supportprojects, first, conducted numerical analysis by use of several different construction methods andsupport parameters in tunnel under complex geological conditions,on the one hand,compared andselected relative reasonable construction method from angles such as vertical displacement,horizontal convergence, the distribution scope of rock plastic zone and so on; on the other hand,optimized the design parameters from the sprayed concrete thickness,bolt length and spacing, aswell as supporting materials and other angles,so as to lay a good technical foundation for the safetyof tunnel construction.In addition, conducted a detailed analysis for adverse geological conditionsand construction disasters of shallow hole section, bias section, weak broken section, cavesection,and put forward the corresponding control technology, thus for tunnel construction safetyprovide the technical support.2.Using B/S structure,based on WEB services, according to the construction process thecontentneeded to manage is divided into construction schedule management, construction safetymanagement, engineering quality management, personnel and mechanical equipment management,video monitoring, engineering change, the external expert review, filemanagement and datastatistics,based on these part content, according to different units nature each part is divided intodesigner, construction side, monitoring party, supervisionparty, and owner of five parts, finally tosummarize all the information together, set up a highway tunnel engineering construction safetymanagement system, thus for safety in the construction of the tunnel to provide managementplatform.3.Combined with support projects filed monitoring, Windows based Access database under thestorage and management funcition, useing the Java language independently researched anddeveloped the “highway tunnel filed monitoring information processing system”,the systemincluding data entry, data pre-processing, graphics display, data regression analysis, the daily report output, results report output, project and parameters statistics, data export and the establishment ofnew projects, user management, data modification, deletion and other function, has friendlyinterface, complete function,wide range of applications, expansion of strong, easy to upgrade andother characteristics, through the used tosupport projects for tunnel monitoring data analysis andtimely feedback to provide convenient and,thereby, to provide management platform for the safetyof tunnel construction, with remarkable results.4.On the basis of design data, based on the monitoring data management platform,through tosystematic site monitor the surrounding rock deformation and primary support deformation,primariysupport and second lining stress,effectively and scientific analysising the rationality of design plan,judging the effectiveness of the construction plan and evaluting the stability of the structure, so as totimely provide a lot of feedback for safety oftunnel construction.5.Integrated the research achievement to build a safety prevention and control system of tunnelconstruction under complex geological conditions, in the system, optimizing the design andconstruction is the pilot, specific diaster prevention and control measures are the foundation, thesafety management system and the field monitoring data management system are the platform, thusto provide management platform for the safety of tunnel construction, field monitoring informationfeedback is the criterion. This research provides technology bases for the highway tunnelconstruction under complex geological conditions.