Research On The Construction Risk Evaluation Of Deep Excavation Engineering Based On The Group Evaluation

In recent years,urban construction is booming,and deep excavation engineering emerge in endlessly.The high-risk sexual of construction process makes risk management of deep excavation engineering has been a very important and necessary research topic,and evaluate construction risk of deep excavation engineering is the science measure to control of project risk effectively.This master's thesis study on construction risk evaluation of deep excavation engineering,on the basis of" Science and Technology Plan Projects of Wuhan Urban and Rural Construction Commission:The Construction Risk Assessment Research of Deep Excavation Engineering in Wuhan(201416)".Because of the complexity of deep excavation engineering and the dependence of human judgment in risk evaluation,to make up for the defects in traditional risk assessment,this thesis introduced group evaluation ideas for deep excavation engineering construction risk assessment,to reduce the subjectivity and limitations of human judgment in traditional risk assessment,and further perfect the construction risk assessment system of deep excavation engineering.Firstly,master's thesis introduced the selected topic background,research purpose and significance briefly,and summarized the relevant research achievements of deep excavation engineering risk evaluation at home and abroad,then analyzed the problems in existing research,putting forward the research content,research thought and innovation of this master' s thesis.For the methods and theoretical support of this study apply to,this master's thesis also made a system introduction.Secondly,aiming at the existing problems to explore the building of panel in deep excavation engineering construction risk assessment.By exploring the expert's composition and weight category to ensure the validity of evaluation subject and the integratable of evaluation results.We identify the risk factors by "WBS-RBS" and"0-1" methods to build the risk index system.Finally,introducing construction risk assessment process of deep excavation engineering in details,and express the panels'assessment information with interval numbers.By quantifying and fuzzy processing the construction risk of deep excavation engineering,obtain the sorting of interval reliability which corresponding to different risk grade,ultimately determine the construction risk level of deep excavation engineering.Finally,the master's thesis take Wuhan Greenland Center as an example,apply the methods mentioned above to evaluate and analyze the project construction risk.Research on the project follow up last year,experienced many field reconnaissance,questionnaire survey and consultation communication with relevant personnel.Initial weights of expert category were determined and adjusted by issuing enough questionnaire.Organizing experts to identify risk factors and score,then obtain index support and risk reliability function,get the project construction risk level,and put forward corresponding measures to control risk according to the evaluation results.