Research On Earthquake Monitoring And Wind Prediction Technology In Railway's Disaster Prevention And Safety Monitoring System

The high-speed railway in China is in rapid development since the Beijing-Tianjin inter-city railway line has been completed on August 1, 2008. According to the railway blueprint, there are 7,000 kilometers high-speed rail lines to be built during the 11th five-year plan. So far, several high-speed railways have been built completely and are running such as Beijing-Tianjin inter-city railway, Wuhan-Guangzhou, Zhengzhou-Xi'an, and Shijiazhuang-Taiyuan high-speed railway etc. By 2015, China will have more than 16,000 kilometers high-speed rail lines, and the maximum operating speed will reach 350km/h. In some of these busy routes freights and passengers will be separated. Growing out of nothing, our country's high-speed railway is stepping into the world's most advanced level. Because of the closed relationships between the operation of high-speed railway and the passengers'lives and property, and the great harmfulness to high-speed railway's operation caused by the natural disasters and risk events, in the countries where high-speed railway has been developed well such as France, Germany, Japan etc. The railway companies begin to plan and build Disaster Prevention and Safety Monitoring System at the beginning of the construction of the high-speed railway, to prevent or minimize the damage to high-speed railway caused by natural disasters and risk events. By now, our high-speed railways all have Disaster Prevention and Safety Monitoring System, which only contain wind speed monitoring subsystem, rainfall monitoring subsystem and foreign object penetration limit monitoring subsystem; in addition, there is only a snow monitoring point in Changchun-Jilin inter-city railway. Different from developed countries, we do not have completed wind speed forecast subsystem and the earthquake monitoring and emergency handling subsystem. On the one hand, trains in high speed will shake or even be in flipped accidents when wind speed is large. For the safety of trains, it's necessary to predict the wind speed in the next few seconds or minutes, and take emergency measures in advance if we need. On the other hand, the damage from earthquakes to the bridges, railway beds, and trains in operation is also quite large. Even very small earthquakes can possibly cause train derailments, or fatal accidents. Therefore, based on analyzing the existing Disaster Prevention and Safety Monitoring System, the paper studies wind speed prediction technology and earthquake monitoring and emergency measures, and propose the system constructing scheme. The main research contents of this paper are structured as follows:(1)The paper analyzes the importance of wind speed prediction and seismic monitoring and emergency handling system to the safety of high-speed railway, and introduces the situation of wind speed prediction technology and seismic monitoring technology at home and abroad, then show the main research contents, and propose the key technology.(2)Based on the existing Disaster Prevention and Safety Monitoring System, the paper adds wind speed forecast subsystem and earthquake monitoring and emergency handling subsystem. And propose the overall frame of the high-speed railway Disaster Prevention and Safety Monitoring System.(3) By analyzing the technology of wind prediction at home and abroad, the author finds the proper wind prediction model based on RBF neural network which is appropriate to our country, and then verifies this model through computer simulation.(4) By studying two kinds of waves of earthquakes, analyzing the real seismic data and extracting the features of earthquake waves, the author provides P-wave recognition technology. First, the author collected the seismic data which is caused by the EMU along the Beijing-Tianjin railway line. Second, compare these data with real seismic data. At last, study the effects on the Earthquake Monitoring System of the EMU. The paper considers the way of earthquake alarm judgment and emergency disposal which is appropriate to our country, and develops the prototype system of railway earthquake monitoring and emergency procedures. And then test the prototype system in National Engineering Laboratory of the High-Speed Railway. The result shows the system runs well.