Risk Analysis Of The First Line Of Shenyang Subway During Construction

There are many uncertain factors during the period of construction,and the uncertain factors will go through all the periods.So it's necessary to have a general and systemic risk analysis,at the mean time give the ways to avoid these.The purpose of risk analysis is to decrease the risks and the loss of risks.It's based on the theory of risk analysis in this thesis,adopting qualitative risk method, quantitative risk method and qualitative-quantitative risk method. According to the characters of Shenyang subway and processing the line of risk analysis,use the risk analysis method such as risk identification,risk assessment and risk evaluation to show the risk of Shenyang subway during construction.Firstly,in the phase of risk identification, the risks of natural envoirement such as partly bad geology,high level of underground water and the risks of constructions will be analysed. Secondly,in the phase of risk assessment,the author analyses the rating of the stations and lines.Thirdly,in the phase of risk evaluation, the anthor introduces the method of Fuzzy-comprehensive evaluation and the method of Fuzzy-FTA,then gives examples.In the end, the anthor gives the methods of avoidance and emergent prediction including the risk of open-cut excavation construction and shield tunneling that is adopted in Shenyang subway construction.