Research On Safety And Countermeasure Of The Mountain Hazards To Bridge Structure

China is a country with a lot of mountains.The mountainous area accounts for two-thirds of the whole land. Also,China is one of country that mountain hazards occurred most frequently in the world. Almost all the kind of the mountain hazards had occurred in our country.Among them,three kind of the mountain hazards occurred most frequently, such as the collapse,the landslide and the debris flow. Bridge is the key point to a route.Once the bridge damaged,the traffic will lost its function and the safety of the people’s lives and property will in danger. Owing to the unfavorable result, it is necessary to study and analysis the effect of mountain hazards in bridge structure safety and analysis of control strategy.This thesis is based on the Chinese academy of Engineering project, he strategy safeguard the structural safety of major transport infrastructure.The main research results includeing the following several aspects:(1)This thesis conduct the specific analysis against to the influence and controlling strategied of the major mountain hazards(collapse, landslide, debris flow) to the major bridge structure’s safety.Discussed the formation mechanism of collapse,landslide,debris flow and condition. And the same as the harm,control measures,the monitoring and early warning systems, etc to the bridges due to the mountain hazards. Special analysis of the current problems in the control techniques and the monitoring and warning systems, and put forward the coping strategies;(2)This thesis accord to the harm of mountain hazards, especially the harm to bridge structure, put forward the principles of disaster prevention. For the bridges under the threat of disasters in mountainous area, proposed some countermeasures from the survey,design, management, targeted protection measures and technology and other aspects,and analyzed the measures and effects of the bridge after mountain hazards harms;(3)This thesis research abroad, particularly in the United States,Japan and countries in the European Alps.Against to the management present situation and achievements of mountain hazards,comparing it abroad with the mountain hazards management in our country. And analyzing the main problems existing in the prevention and control of mountain hazards in China;(4)This thesis aim at the problems and the insufficiency of our country in mountain hazards prevention put forward countermeasures.