The Safety Risk Management Of High Gas Tunnel

With the development of tunnel design and construction,a lot of long gas tunnels have been constructed in the transportation infrastructure construction.Since it shows great significance in the safety of gas tunnel constructions,the study on the safety risk management of gas tunnel constructions becomes increasingly valuable.Based on the single monument tunnel engineering of the special railway in Nanchong Chemical Industrial Park,disaster information from researches related to gas tunnels,this paper elaborated the characteristics of gas storage in non-coal strata gas tunnels,as well as the storage,transshipment and the main risk and harm of tunnel gas.This paper also elaborated systematically the related theories of risk management after a series of researches on the risk management theories.In addition,risk identification,analyzing,assessment,monitoring also have been analyzed in this paper.By making use of the current theories and methods of risk management,this paper shows how to deal with the safety risk factors during the gas tunnel construction after the identification and assessment of them.Survey evaluation and Fuzzy comprehensive evaluation has been used in this paper to analyze the safety risk in the single monument tunnel constructions in order to take response measures.This paper also made a special plan to effectively make the tunnel gas under control.(1)The non-coal strata gas tunnels have greater risk during construction due to the objective,random and unpredictable distribution of tunnel gas,They should be paid more attention to due to their greater risk.(2)Due to the randomness and unpredictability of the non-coal strata gas tunnels,fuzzy comprehensive evaluation method has been finally chosen in the risk analysis,while there are numerous factors affecting the safety risk of the non-coal strata gas tunnels.(3)In order to take safety risk under control during the construction of single monument tunnels,this paper made response measures to different risk factors.Facing with the risk of gas,a series of special plans such as monitoring,ventilation,geological prediction,Gas outburst prevention had been made.