Study On The Construction Safety Risk Management Of Fengdouya Tunnel

In recent years,China's infrastructure construction has developed rapidly.With the expansion of the scale of engineering construction,the tunnel engineering construction has also entered a period of rapid development correspondingly.At present,the construction scale and investment amount of tunnel engineering projects are generally large,and the environmental conditions faced in the construction process are relatively complex,difficult to work,and also affected by the surrounding environment.In view of the tunnel engineering has many complex factors,in the construction stage of the tunnel engineering,the probability of safety accidents is relatively high,which brings great economic loss and personnel loss,and has a great negative impact on the society.Therefore,in order to ensure the safety of tunnel construction,it is necessary to evaluate and manage all kinds of safety risk events in the tunnel construction stage.In this paper,"fengdouya tunnel of dingshui to shengzhonghu to Siyi highway project in southern Sichuan Province" is selected as the main research object,aiming at the safety risks faced by fengdouya tunnel in the construction stage,the specific research work is as follows:(1)Combined with the engineering practice,construction situation,drawings and construction organization design of fengdouya tunnel project,the safety risk events in the construction process of fengdouya tunnel are identified by means of on-site data analysis and expert investigation,and six main risk events are identified,including engineering geology,tunnel structure and monitoring measurement.(2)According to the safety risk sources and risk events in the construction of fengdouya tunnel,the safety evaluation index system of fengdouya tunnel is established,and the probability of safety risk occurrence and loss consequences in the construction of fengdouya tunnel are quantitatively analyzed by using the fuzzy set theory.(3)The weight of each index is obtained by AHP,and the weighted average method is used in the calculation to evaluate the construction safety risk of fengdouya tunnel.According to the principle of maximum membership,the evaluation is carried out according to the evaluation set,and the result obtained by weighted calculation is the final evaluation result,so the occurrence probability of the safety risk of fengdouya tunnel is the grade of occasional occurrence.The consequence is serious level.According to the safety risk level standard,the construction safety risk level of fengdouya tunnel is level III.(4)Through the calculation and analysis,the importance weight of each risk event of fengdouya tunnel and the overall safety risk level of fengdouya tunnel construction are obtained.According to the importance degree of each risk event above,this paper studies the corresponding risk response measures for the safety risk event of fengdouya tunnel.In this paper,the AHP fuzzy comprehensive method is used to carry out risk assessment,which can estimate the probability of risk occurrence and the level of loss.On this basis,risk response measures are formulated for relevant risk events,which has certain reference significance for the site construction organization management and risk avoidance of tunnel engineering.The research contents and methods of this paper have certain reference value to ensure the safety of personnel and equipment in tunnel construction and the normal development of project construction.