Study On Safety Risk Assessment Technology For Deep Foundation Pit Of Pile - Anchor Retaining Structure In

With the accelerating progress of urban, more and more people realize theimportant of underground space, which making the development of excavationengineering contentiously, and the main development manifestations are: the depth ofexcavation engineering is deeper and deeper, the increasing scale, so the risk theyfaced is much more. Based on the present situation, this paper focus on the securityrisk assessment of deep foundation excavation of red sandstone in Hengyang Hunanprovince. By collecting the measured data of the construction of foundation pit inHengyang region recent year, construction materials, working condition of excavationand so on, Using data mining technology, excavating the foundation pit monitoringalarm value in the process of the excavation of foundation pit, moreover, using riskmanagement theory and the theory of safety engineering to study the risk factors of thefoundation pit, which including the followings.According to the current reality of foundation pit engineering monitoring data,because of the difficult problems such as more data, more information, mining themonitoring data of six large foundation pit in Hengyang with data mining technology,and finally based on the principles of alarm value set, mining the monitoring alarmvalue of red sandstone area foundation pit in Hengyang. Based on the current domesticstatus of the defects in the foundation pit monitoring, expounds the necessity offoundation pit monitoring of early warning system, in the same time, according to thecharacteristics of the foundation pit engineering, established the deformation offoundation pit excavation early warning system, and on the basis of the domesticcurrent specification as well as the predecessors’ research results, discusses thedetermining method of the early warning value of excavation.Finally evaluating the entropy weight method and fuzzy comprehensive method,and applied them to engineering practice. Thought comparative analysis on the securityrisk assessment baseline with data mining and on the specification and calculationdesigned to determine the composition of integrated alarm, it is concluded that the results of data mining conforms more with the engineering practice;...