Research On Risk Evaluation And Early Warning System Of Deep Foundation Pit With Pile-anchor Composite Retaining Structure

Into the 21 st century,the construction of Chinese cities develops rapidly.Besides,we can see that high-rise and super-high-rise buildings arise increasingly and foundation pit projects increase likewise.Owing to the intricate state of foundation pit engineering,the ever so high density of construction(structure),and the branches of road and underground pipe network,the accidents of foundation pit engineering often take place.It is of great necessity to keep foundation pit engineering construction safe.Pile-anchor composite retaining structure,as a common form,has an extensive application through the ages.However,when looking for the literature on the early warning system of the safety risk evaluation system of deep foundation pit of pile-anchor composite retaining structure,we find that the corresponding research is relatively few.By comparing and analyzing the monitoring data and numerical simulation conclusions of deep foundation pit,this study aims of exploring the transformation law of monitoring parameters of deep foundation pit of pile-anchor composite retaining structure in the process of excavation.By applying a risk assessment theory and tools,carrying on a risk assessment to the foundation pit,this research sets up a pattern named multi-stage fuzzy comprehensive evaluation model of deep foundation pit for pile-anchor composite retaining structure.Using it as a base,python language is used to compile the risk early warning program for deep foundation pit of pile-anchor composite retaining structure.Besides,the matched smart pre-warning system and targeted risk handling measurements are adopted.The findings of this research,from both theoretical and practical aspects,make significance to Promote the informatization of foundation pits and ensure safety.Following are main research contents:(1)The parameters of each monitoring project are obtained by monitoring the deep foundation pit.By applying ABAQUS finite element software to acquire the analog data of each surveillance vision.Through comparison,the variation rules of parameters of different foundation pit monitoring schemes are obtained.(2)Based on the monitoring data,simulation data and the transformation law of parameter,a multi-stage fuzzy comprehensive evaluation model for deep foundation pit was established by using risk evaluation tool.Finally distinguish the risk level of the whole foundation pit and each monitoring project.(3)Basing on the risk level discrimination of each monitoring project of foundation pit,using Python language,a smart pre-warning system for deep foundation pit of pile-anchor composite retaining structure is exploited to realize the purpose of foundation pit construction informatization.Matched risk measurements are formulated in the light of risk levels of each monitoring program,so as to guarantee the security of deep foundation pit construction.Through this study,A multi-stage fuzzy comprehensive evaluation model for deep foundation pits is established based on monitoring and simulation data,.ntelligent early warning of deep foundation pit of pile-anchor composite retaining structure is developed by using Python language system,thus equip foundation pit engineering construction with informatization and guarantee the security of foundation pit construction.Moreover,future comparable project construction can refer to as well.