Study On Safety Risk Management Of Deep Foundation Pit Excavation Construction

With the rapid development of China's economy and the progress of the society,the construction space becomes more and more intense.In order to make full use of the land,a large number of high-rise buildings have emerged,so more and more deep foundation pit projects have been produced.With the increased scale and depth of the deep foundation pit excavation and the complexity of the geological environment,the complexity of the construction of the deep foundation pit is also increasing.In recent years,due to technical,management and other reasons,there were many accidents in the construction process of deep foundation.This has brought great economic losses to the country and society,not only the time delay,even some accidents caused by adjacent buildings collapsed and casualties,resulting in a very bad social influence.Therefore,it is of great practical significance to strengthen the safety risk management,prevention and control the potential risks in the construction of deep foundation pit.Based on the theory of risk management,this thesis refers to the conclusion that scholars studied about deep foundation pit engineering construction.Combined with the actual situation of the construction of deep foundation pit engineering in our country,it identifies six major influencing factors of safety risk management in the excavation of deep foundation pit,including human factors,mechanical factors,material factors,process factors,environmental factors and management factors.Then builds risk management system of excavation of deep foundation pit construction safety,and prepares construction safety risk scale.After modifying by experts and eliminating unreasonable items,the formal questionnaire was formed.Issuing and recycling questionnaires,and then have a preliminary descriptive statistical analysis and reliability and validity test to ensure the rationality and validity of the data.On this basis,the first and two order structural equation model for the safety risk management of deep foundation pit excavation is constructed.Collecting data for structural equation analysis,using AMOS 17.0 structural equation software to model,then evaluating and interpreting the results.Through empirical analysis,the hypothesis of structural equation model is verified.At last,the paper puts forward some countermeasures to reduce the safety risk of deep foundation pit excavation.It is hoped that through the study of this thesis,it will be helpful for the construction enterprises to put forward some specific measures to improve the safety risk management of deep foundation pit excavation.