The Construction Risk Assessment And Research Of The Yellow River Crossing Tunnel Of The Middle Route Project Of South-to-North Water Diversion Based On AHP And Grey Theory

In recent years,the south-north water diversion project is a major inter-basin water transfer project,the project is planned and implemented in our country.The Yellow River crossing tunnel is key building in the middle route project of south-to-north water diversion.The tunnel through mixed formation which is made up of saturated medium-fine sand,silty loam,sand and soil,etc.Hydrogeological conditions is complicated,the project has high difficulty technical requirements.Moreover,the Yellow River crossing tunnel has the characteristics of large diameter and long distance,it is large water conveyance tunnel engineering,the groundwater pressure is bigger,requirements of the tunnel's construction equipment and construction technology are higher.Therefore,carrying out construction risk assessment and research of the Yellow River crossing tunnel of the middle route project of south-to-north water diversion,it has important reference value for construction risk management and control of the Yellow River crossing Tunnel.The paper combined with the Yellow River crossing tunnel of the middle route project of south-to-north water diversion,starting from the actual situation of project,AHP and grey theory are applied,carrying out construction risk assessment and research of the Yellow River crossing tunnel of the middle route project of south-to-north water diversion.The paper discusses the research background and significance,the research status at home and abroad of construction risk assessment of the underwater tunnel are elaborated,giving research methods and main content.The paper expounds basic theory and method of risk analysis,building construction risk assessment model of the underwater tunnel.Taking actual project as an example,the project profile,construction way,tunnel section and engineering characteristics of the Yellow River crossing tunnel of the middle route project of south-to-north water diversion are elaborated.This paper discusses construction risk identification of the Yellow River crossing tunnel from risk identification methods,risk factors identification and risk evaluation index system,etc.Analytic hierarchy process and grey clustering method are used respectively for construction risk assessment of the YellowRiver crossing tunnel of the middle route project.Through the objective and effective risk assessment model,researching risk level of each level factors and overall risk level of the Yellow River crossing tunnel of the middle route project in construction process.