Subway Shield Construction Risk Management And Application Of Research

Construction of metro shield is of some characteristics, such as long-term construction, numerous subprojects, complexity of construction technology, and unpredictability of risk factors, etc. In recent years, there appeared sequent metro engineering accidents, which draws a great deal of attention of people into the construction safety risk of metro engineering. Thereby, it is necessary to carry out the research in risk management on the construction of metro shield.With the combination of the risk management theory and the experience got from the metro projects, the paper detailed content from risk identification, risk assessment and risk control.The main contents of the paper summarized as follows:1) Based on the Check List Method, Venn diagram, Work Breakdown Structure(WBS), and Risk Breakdown Structure(RBS), risk index system of metro shield project is established by using the Pattern of primary selection—reseletion—brekdown.2) Because of the shortage in Analytic Hierarchy Process(AHP), improved the model of AHP by taking account of Triangular Fuzzy Number theory and the traditional AHP.3) The calculation of risk quantity should be considered from Probability, Consequences and Uncontrollability, it embodies the idea of risk management. Based on the three variables, we can ascertain interval range of the risk quantity, accordingly get the standards of risk level.4) The paper integrates the Fuzzy Comprehensive Evaluation with improved analytic hierarchy progress, so that it suits the metro shield constructiong risk analysis better and can swell the applicability and accuracy of the project risk analysis.5) Take a actual project as an example, make risk analysis using textual risk model, and put forward correspondingmeasures to reduce the risk of it.Research on the risk management of metro shield construction, which can can predicted and solved constructive problems, has certain guiding significance for safety in construction.