Highway Tunnel Construction Caving In Risk Borda Foreword Value-Matrix Appraisal Method Research

In recent years,with the rapid development of highway industry in our country,all kinds of disaster in highway tunnel accidents are frequent,tunnel construction also highlights the importance of risk assessment in the process,Collapse as a road tunnel safety accident appears most likely,the most serious risk of accidents,it is necessary to focus on it,to be able to implement rapid response to its actual construction process,reduce the probability,reduce its impact.The main content of this article is as follows:First,the risks of highway tunnel construction research is summarized,analyzed problems in current risk assessment studies,concluded that the need for this research.Second,through on near 20 years to highway tunnel construction process in the appeared of various risk accident case of survey statistics and compared analysis,summary out highway tunnel construction process in the of several big important risk event,and based on analysis of 56 tunnel collapse accident case statistics,and from construction conditions,and structure program,and construction technology,and construction security management four aspects on highway tunnel collapse mechanism for has research analysis,for building highway tunnel collapse risk assessment model lay method based.Third,compared with a variety of risk assessment methods,ultimately choose to risk matrix for the main research methods and inadequate risk matrix,Borda sequence method and analytic hierarchy process applied to risk matrix method of calculation in the process of building a highway tunnel collapse risk assessment model.The method of quantitative analysis for highway tunnel collapse risk is realized,and based on the risk factor of Borda sort sequence value realized its importance.Fourth,on the basis of each of the above-mentioned risks factors,comprehensiveness,objectivity and sensitivity,relative independence of the principle of constructing the index system of highway tunnel collapse risk,building a total of 4 levels indicator,12 secondary indexes.Fifth,the use of this road tunnel collapse risk assessment model for ping tunnel collapse risk assessment,by calculation,ping tunnel collapse initial risk level belongs to the third level,risk level is higher,requires the development of appropriate risk response and dynamic management.According to assessment to determine the geological and supporting programme,geological forecasting,monitoring and measurement are four of the most influential of all risk factors,and focused on the four risk factors develop risk response measures.Along with proposed risk response measures,strengthen the risk management of tunnel construction,which can control ping tunnel collapse risk,during the construction of landslide risk level II level,within the acceptable range.