Research On Nonlinear Mapping Relationship Between The Cause Factors Of Subway Construction Disaster

With the development of China’s economic and the city size continued to expand,thedevelopment of rail transport has become an important factor of restricting urbandevelopment. Due to the characteristics of no pollution and large passenger volume aboutsubway, more and more urban build subway construction. At the same time, due to thecharacteristics of subway construction, many uncertainties in the construction process,disasters have occurred during construction which resulting in a large number of personnel,property damage. Risk monitoring for risk factors of causing accidents will effectively reducethe occurrence of disasters, thereby reducing losses caused by disasters.This article obtains from the trigger disaster accident risk combination, through theinteraction between the factors cause of risk portfolio, determine the nonlinear mappingrelationship between the cause factor of subway construction disaster accident.In view of thenonlinear mapping relationship between factors, formulating the feasible monitoring solutionby limiting the nonlinear mapping relationship between function to reduce the probability ofrisk events.First, through the causation mechanism of disasters analyzing to determine that disasterscaused by a combination of risk consisting of four dimensions "Man-Machine-Environment-Management" after passing the risk determining control the generation and transmission ofrisk portfolio for the study.Second, selecting the collapse as an example, selecting subway construction collapsescenario actually happened analyzed, determine what factors causing disasters. Through theanalysis to determine the combination of the risk factors that formed by the combination ofcausation factors and establish the mapping relationship of risk portfolio and Collapse.Third, by analysiing causation risk portfolio by association rules to determine thefrequent item sets of disasters. Determining the nonlinear relationship caused by factorsamong the frequent item sets by cumulative support.Finally, taking measures according to the characteristics of nonlinear mapping to makeup practical risk control program which to achieve control of disasters by controlling thenonlinear relationship factors.