The Risk Evaluation For Tunnel Construction Based On The Theory Of F-ANP

Mountain highway tunnel engineering item is a system that has complicated inner structure, needs a great deal of investment and long periods of time to fulfill as well as involves numerous ingredients. Its concealment, stratum condition and ambient uncertainty all increase the risk and difficulty of the construction. In order to enhance risk-defending ability and fullfil construction, it's extremely essential to exert a risk assessmnet in mountain highway tunnel construction.This thesis has a systematic research on risk assessment of Mountain highway tunnel construction . Firstly, it briefly narrates the current methods to evaluate tunnel construction risks, which include hierarchy analysis method, network analysis method as well as fuzzy Synthetic Evaluation method, and compare them with each other. While this thesis adapts a new evaluation method, fuzzy network analysis method, initially put forward in China in 2007. Fuzzy network analysis method is an extension of network analysis method in solving uncertain and vague problems, which solves these problems quantitatively.Secondly, the thesis further constructs the risk assessment model of mountain highway tunnel engineering construction on the current study of item risking evaluation, starting by analysing the characteristics of the tunnel projects' risk, and then applying qualitative and quantitative approaches as well as theoretical analysis and research methods. By making use of the above model to calculates or educes the weight of various risk ingredients in tunnel engineering item, the assessment rank of the risk bocomes available. The assessment result also provides some gists for risk control. Finally, on the basis of theory research, fuzzy network analysis method is applied to Xuefeng mountain tunnel engineering item to prove it's scientific and effective. Making this method convenient to use, the thesis also composes a Matlab calculation proceeding to decrease the manual calculation.The completion of this thesis is based on Chongqing natural scientific research project, which is"Highway Mountain Tunnel Construction Risk Evaluate and System Study of Security Management"...