A Study On Risk Prediction And Response Of Deep Foundation Pit For Shimao Wulihe In Shenyang

The risk factors of deep foundation pit are complicated and changeable during implementation and construction,any problems in any link can make the project risk.It's made analysis on the risk factors at the different stages of the deep foundation pit and given accurate evaluation and effective response measures,so as to effectively control the risk of deep foundation,reduced the foundation pit accident,which have been the concerns of research for experts and scholars in recent years.The common method in risk evaluation of deep foundation pit which is mostly application expertise or investigation on the basis of qualitative analysis is given project risk level,combined with some quantitative methods.The research method exists a certain subjective uncertainty one hand,the forward risk prediction for deep foundation can't achieve on the other hand.Therefore,the effective control of project risk is very limited.Through a lot of deep foundation pit project investigation showed that before the accident can be through the field monitoring data analysis and.It's shown that the project can be predicted by analysis on site monitoring before accident on the basis of a large number of accident investigation for deep foundation pit.Therefore,how to make evaluation of risk prediction by site monitoring data and give effective risk response is a research topic worthy of our attention.Risk prediction methods and countermeasures for the research based on field monitoring data are systematically studied that takes deep foundation pit for Shimao wulihe in Shenyang as an example,combining with statistical data and research results of an instance of most the same project.The main contents and conclusions are as follows:(1)This paper introduces the characteristics of deep foundation pit project and the process of risk management;A comparative analysis is made with the methods of risk identification and risk evaluation of deep foundation pit project;Make a summary of the risk countermeasures commonly used in deep foundation pit project.(2)It is established the risk prediction and evaluation system of deep foundation pit project based on monitoring index;The safety classification standard based on monitoring index is established,due to the current national alarm value with standard cumulative and the alarm value of change rate as the control standard in dangerous state,which lays a theoretical foundation for the risk evaluation of deep foundation pit project.(3)It forecasts the monitoring data by using gray forecasting model,determined the weights of the monitoring items by the gray relational analysis method,carried out the risk prediction of deep foundation pit for Shimao Wulihe in Shenyang project based on the gray system theory.(4)According to conclusion of the risk prediction of Shimao Wulihe in Shenyang project,this paper analyzes the dangerous status and corresponding potential risk sources when the monitoring data is abnormal.,It put forward an effective risk response measures combined with a single monitoring project weight and risk.