Research On Judgment Of Safety Risk State Of Tunnel Construction Collapse

Tunnel safety risk occurs mainly in the construction phase of the project,the landslides as tunnel construction is the most common accident,once happened to personnel,property and time limit for a project may cause huge losses,how to accurately identify the tunnel construction landslide system security risk state and carries on the effective judgment is the current in the tunnel construction safety risk management problems to be solved.On this issue,from the perspective of system mutation,this thesis studies the safety risk factors of tunnel construction collapse,the measurement of system safety risk state,the judgment and control of system safety risk state and so on.Firstly,the paper analyzes the collapse in tunnel construction,security risk,security risk status,related concepts,types and characteristics of landslides in tunnel construction system is put forward on the basis of the safety risk analysis framework,and collapse in tunnel construction safety risk state judgment process,state of the collapse in tunnel construction safety risk for the following research provides the theoretical basis and research way.Secondly,analyze the collapse in tunnel construction safety risk factors,through the statistical analysis of the tunnel construction landslide case,get tunnel landslide characteristics,supplemented by literature research and field research,will eventually collapse in tunnel construction safety risk factors in hydrogeology,survey and design factors,construction factors,safety management,4 kinds big,had 13 major security risk factors.Then,the landslide safety risk factor analysis,on the basis of the hydrological geological factors as the physical environment,survey and design,construction,safety management factors of human activities,due to the effect of dynamic of the physical environment and human activities in the end lead to collapse in tunnel construction,and thus establish the tunnel construction landslides system security risk factors pass class times,using mutation progression method to construct tunnel landslide system security risk state metric calculation model.Finally,the construction of the tunnel collapse system security risk status value judgment analysis and system security structure relations,based on cusp catastrophic model,the state of tunnel landslide system security risk,qualitative analysis and quantitative derivation tunnel landslide system security risk status value and stability of system structure,the relationship between security risk state interval tunnel landslide system is obtained,with HZ high-speed MLP tunnel as an example,to determine collapse in tunnel construction safety risk condition,the judgment result is consistent with the actual construction,for tunnel construction landslide system security risk status value relation with the location of the system state surface,Propose risk control measures.Thesis from the tunnel landslide system security risk condition judgment problem,the dynamic changes of the research state of landslides in tunnel construction safety risk and security risk judgment,enrich the research of the tunnel construction safety risk management connotation,timely and accurate judgment collapse in tunnel construction safety risk status,the active control measures,for the improvement of the tunnel construction safety management has important practical significance.