Study On The Coupling Models For Construction Risk Of Deep Excavation In Subway Station

Currently, the security risks control of underground engineering projects is still amajor problem in the field of construction. Especially in the deep excavation constructionprocess of the subway station, a series of security risks will be produced, the couplingeffects between different risks, the accident area may occur and the probability was lesseasy to determine. Therefore, to carry out the risk coupled model of deep excavationconstruction have great significance to improve the level of risk management.The coupling models reaserach for construction risk of deep excavation in subwaystation include the following aspects: Reasearchs of risk management and coupling modelin underground constructions at home and abroad got reviewed; The necessity of deepexcavation construction risk reaserach was proposed, then define the connotation andcharacteristics of the subway station deep excavation construction risk, emphasizing theimportance of risk coupled research in deep excavation construction useing open-cutmethods, and to extract the eight major risks in the construction process; Risk evolutionanalysis models and qualitative methods to use for the above eight kinds of risk, depict thecorresponding risk evolution diagram; Three ways of risk analysis including models basedon the degree of risk, models based on the degree of coupling, based on the numericalsimulation explaned; A practical engineering case of Wuhan area combined, the use of thethe risk degree method and the degree of coupling model methods.This article introduced the concept of the coupling to the subway station deepexcavation construction area of risk management, summed up the evolution of the eightmajor risk in open-cut station deep excavation construction and study the risk degree ofcoupling in subway station deep excavation construction, on this basis, subway stationdeep excavation construction risk degree of coupling model was built. Through caseempirical, to some extent, confirmed the applicability of the degree of risk and the degree of coupling model. This article in the subway station deep excavation construction riskassessment methodologies with innovative.