Study On Risk Management Of Excavation Deformation Of Deep Foundation Pit Of Hunan Nuclear New Home

Because of the complexity of the deep foundation pit engineering construction and uncertainty,in the foundation pit construction of deep foundation pit project construction enterprises face greater risks,but most of foundation pit engineering project risk associated with the deformation of foundation pit excavation,the deformation and natural factors such as soil,groundwater seepage are highly correlated,the controllability is poor,therefore,because of the deformation rate of high risk caused by deep foundation pit.In order to effectively control the deformation risk of deep foundation pit excavation and reduce the risk rate,this paper combines the concrete project of the Hunan nuclear new home,and studies the deformation risk management in the excavation of deep foundation pit.In this paper,four steps of risk management are studied by means of data collection method,simulation comparison method and expert demonstration method,Firstly,the author collected domestic and foreign literature,analyzed and studied the theory of influencing risk management of foundation pit;The ABAQUS finite element software was used to simulate the deformation of the wall with the depth of excavation.Even the wall structure according to the simulated analysis,supporting measures if found no increase in supporting structure,soil digging holes open wall produce bigger horizontal displacement,when adding the support structure,deep foundation pit lateral deformation obviously slow.In this paper,the existence of deformation risk in deep foundation excavation is predicted,as well as the increase of internal support structure,which can effectively control the excavation deformation of deep foundation pit.According to the front,from the strengthening of foundation pit monitoring,to do a good job of rainfall drainage,within a reasonable selection of supporting pile + support support plan,strengthening the engineering management,building deformation four steps starting from the emergency plans,detailed discusses how to control the risk of the deformation of deep foundation pit excavation of Hunan nuclear new home.