The Research Of Xi’an Subway Construction Safety Risk Early Warning

With the dramatic increase in Xi’an urban population and rapid economic development, subway has become an important way to improve traffic problems, subway construction safety issues more and more attention, how to reduce subway accidents during construction, good subway construction early warning of security risks, has become an issue of growing concern.Xi’an is located in the Loess special geological conditions in the subway project construction process there is a huge security risk, especially in Metro collapse accident is very risky, in order to do a good job of Xi’an subway construction process safety, effective prevent safety accidents, we need to establish a foundation pit construction safety risk early warning system, strict and effective control of Metro Foundation Pit risk. So building foundation pit construction safety risk early warning system that can ensure the safety and health of construction workers to avoid or reduce accidents, save costs and resources; also conducive to the scientific management of the project, to ensure the smooth progress of subway construction has practical significance.In this paper, first at home and abroad subway construction safety risk management research theory expounded clearly the content of this article studied the theoretical basis, through field research collected subway construction pit unsafe place accident cases, pointed out the need for excavation of subway construction safety risk warning the necessity and significance of research.Then based on the data collected,analysis of Metro pit construction safety risk warning of possible danger sources and direct form,the basic elements of the three aspects of causation,subway construction pit construction safety risk warning indicator system to explain the subway construction safety warning process.Finally, the introduction of the "Xi’an Metro Line 1 Chanhe station " comprehensive entrances empirical analysis of actual cases, results show that for special geological conditions less foundation established security risk early warning system,the basic material capable of Subway Foundation Pit safety hazards and evaluate causation factors,with good application value.Also, this study is to achieve subway excavation during the construction safety warning management, for other cities have similar geological structure of the subway loess foundation pit construction safety management can provide some reference.