Whole Process Safety Risk Assessment System And Its Application In Construction Of Super Large Cross Section Tunnel Based On Cloud Model

With the demand of social development,the city traffic pressure is harder and harder,urban rapid road network construction greatly ease the traffic pressure in the city,two lane and three lane tunnel has been difficult to meet the traffic demand.However,increasing the size of the tunnel construction,tunnel construction risk such as collapse,hole instability,sudden gushing mud,against objects,gas explosion and fire in tunnel construction accidents,construction risk doubled,serious losses.The research of traditional risk assessment is difficult to guide the whole construction of super large section tunnel.This paper follows the process of risk:risks-risk factors-risk-risk analysis,risk identification of super large section tunnel integrity,systematic dynamic deeply,and then obtain the evaluation index system of risk identification results conform to the construction of super large section tunnel and risk.Trapezium cloud model of super large section tunnel construction risk assessment based on the first is based on the risk problems of large section tunnel under construction and completed in the summary by Delphi method on the risk screening classification summary,summarized the causes of risk,and the construction of large section tunnel construction risk index system.Then use the analytic hierarchy process for construction risk index weighting,combined with the characteristics of trapezoidal digital cloud model characteristics consistent with the influence of the risk of tunnel risk is fit,then using the AHP analytic hierarchy process to determine the weight of construction risk index,and then select the appropriate trapezoidal digital cloud model feature,use to evaluate the tunnel section of engineering data obtained by the current trapezium cloud model the membership matrix,finally using the method of fuzzy comprehensive evaluation to calculate the risk level of membership vector of tunnel construction risk rating overall judgment.To solve the previous risk assessment results and on-site engineering risk rating bias,random,has the guiding significance for the special drug prevention measures to guide tunnel in different construction stages.According to the Ji'nan Beltway of Ji'nan connecting line big ridge tunnel project,through the process of the whole tunnel risk assessment and risk assessment of major projects,the security risks of the whole construction process of large section tunnel evaluation analysis.Early risk control program and measures,and in the whole process of construction of the tunnel has guiding significance for safety work.At the same time,the evolution mechanism and construction safety control and risk assessment method based on risk of super large section,set up the evaluation index system of risk in tunnel construction,the tunnel construction of the entire risk management technology,combined with the trapezoidal cloud model and the fuzzy evaluation method to carry out risk assessment and control of the whole process.Finally,through the system design,the design of the system login module,security information management module,construction process monitoring module,information fusion analysis module and early warning release module function.In the construction management of tunnel,risk safety management plays an important role.Through the risk assessment system used in the tunnel on the whole process can be found on the current super large section tunnel construction of this system can make scientific and rational judgment,proved that the risk assessment system of trapezium cloud model can generally super large section tunnel has higher application value risk of the construction control and dynamic security.