عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Underground and infrastructure projects are generally complex project with many variables including ground and groundwater conditions are variable and uncertain. These conditions infliction significant risks in all project components or parts that are indirectly related with the project, and has led to the high costs and time delays to the project. Ranking by providing timely response to risk it all, helpful to the risk management process will be more successful. In this paper, prioritize risks are discussed in the mechanized tunneling to using Fuzzy Technique for Order Preferences by Similarity to Ideal Solution (FTOPSIS) in rocky environments. The calculations performed in 19 separate zone and ultimately three risk as the high risk (main) in each zone specified. The analysis results show that leaks of toxic gases in rocks and water leaks and influx into the tunnel in this study are respectively most important risks.
Risk assessment is one of the fundamental elements of risk management, and with respect to the uncertain nature of tunneling projects and the need to spend resources, is important. Ranking of risks is a key part of this process, because with ranking, priority each risk in front of other risks specified and in the result, decision maker can be plan about the the amount of allocation existing resources for deal with each risk.
Methodology and Approaches
In order to risk assessment, different methods have been introduced. In this paper, the method is Fuzzy Technique for Order Preferences by Similarity to Ideal Solution has been used to rank the risks. In this study, according to Hydrogeology of tunnel route, kilometer of 00+000 to 13+290 divided to 19 zone. 9 risk as the most important of the geological risks and 4 factor as effective criteria’s is introduced for ranking in mechanized tunneling in rocky environments.
Results and Conclusions
The analysis results show that leaks of toxic gases in rocks and water leaks and influx into the tunnel are respectively most important risks in the tunnel. Hence the should be by allocating more resources seeking eliminate or reduce the damaging effects of these risks on project objectives. Therefore, the recommended, strategies to counter risks listed to be determined before drilling operations, until in the event of, tunneling operations to be performed without interruption.