Abstract:

First, the principle of the safety monitoring system is presented; Then, the application of the safety monitoring system in each construction stage of the high gas concentration lot of Sanlian tunnel and the problems occurring during the operation of the system, including data transmission errors, influence of shotcreting and water seepage on the sensors, influence of lightening on the sensors and sensor defects, are presented; At last, some improving suggestions and solutions are proposed on basis of the site situations. The paper has active significance for the popularization of the safety monitoring system in future gas tunnel construction.

Key words: tunnel, high gas concentration, safety monitoring system