The maximum speed of
high-speed railway can reach three times that of ordinary trains, making intercity transportation more convenient. However, the high-speed rail accident in Germany in 1998 has left people with lingering fear. With a speed of 350 kilometers per hour, China’s intercity high-speed rail is ahead of the world, but safety has always been the most concerned issue.
Bund pictorial reported on July 15, 2010 that Chinese passengers have long been used to the “high speed” of high-speed railway (hereinafter referred to as high-speed railway). Although the ticket price is expensive, because its speed can often reach three times the speed of ordinary trains, high-speed railway will still become the first choice for people to travel in most times.
according to the regulations of the international railway union, only trains with a speed of 200 kilometers per hour can be called high-speed railway. However, in recent years, several high-speed railway lines built and opened in China have a speed of more than 300 kilometers per hour. Among these railways, the Beijing Tianjin Intercity Railway still maintains the world’s fastest record. Its design speed can reach 350 kilometers per hour. In the test in 2008, its maximum speed reached 394 kilometers per hour – before that, the record holder of “the fastest train in the world” was the French high-speed railway lgvest line, Its operating speed is 320 km – also because of the high speed such as the Beijing Tianjin Intercity Railway, it used to take an hour to travel from Beijing to Tianjin, but now the time is almost halved.
trains begin to fly on the ground. On the one hand, there is no doubt that it brings convenience to people’s travel, but on the other hand, what kind of runaway scene will it be if the train breaks down at high speed?
if the tragic accident of German high-speed railway in 1998 had not happened, the high-speed railway would probably maintain its reputation as “the safest and most comfortable means of transportation”, but the accident changed everything. Many news photos have recorded the tragedy at that time: the 410 meter long train rushed out of the track at the speed of 200 kilometers per hour. The first carriage was thrown into the air like a loaded bullet, and then fell to the ground. The carriages behind collided with each other and squeezed twisted together. In just over 100 seconds, 101 of the 400 passengers in the carriage were killed and 105 seriously injured.
National Geographic magazine produced a special program for the accident to reproduce the scene of the accident. The production team found three accident survivors, and YOG was one of them. At the time of the accident, he was sitting in the first carriage of train 884 with his wife and children. Just two or three minutes before the accident, “there was a sudden bang, and then a huge metal strip cut through the handrail between my wife and son. This metal strip cut a big hole in the box floor”. Then he ran out of the carriage, spent more than a minute to find the conductor, and then ran back to the place where the metal strip came out, and the train derailment accident occurred. The accident investigation team after
found that the reason why train 884 caused such a terrible accident was caused by a series of accidents. First of all, because of long-term high-speed operation, one wheel rim of the train broke. The train continued to run at high speed, and one end of the broken steel ring was suddenly inserted into the carriage from the bottom of the carriage – the section that YOG saw; The other end pried up a section of auxiliary track, causing the train to enter the wrong track. But even so, the train should have been able to stop slowly through the automatic emergency braking device; Unfortunately, at this time, the second carriage of the train collided with a support column of the road and bridge from the side, resulting in the collapse of the road and bridge, and the carriages behind the train also collided with the previous carriages out of control…
if any one of the faults occurred alone, the impact on train 884 would not be so bad. The restatement of the accident in that year in National Geographic always seems to imply such subtext; The conclusion of accident analysis seems to turn the “natural disaster” of high-speed railway into a man-made disaster. The final cause of the accident in 1998 was attributed to three engineers who were dedicated to the repair and maintenance of the train. Because of their negligence, they failed to find the hidden dangers of the wheels. If the inspection were more careful, the accident seemed to be avoidable.
but on the other hand, it also reveals to us how limited the tolerance of super fast high-speed railway to small faults. On the track with a speed of 200 km / h or 300 km / h, once any problem occurs, the possibility of passengers’ self rescue will become very small. After all, everything came too soon.
safety acceleration on closed track
but objectively speaking, it is not easy for modern high-speed rail to collect all the faults that caused the high-speed rail accident in Germany in 1998.
have increased from 200 km / h to more than 300 km / h. It seems that the speed of high-speed rail has only increased by 100 km, but in fact, the technology used to support train acceleration has been upgraded exponentially. The safety factor of high-speed railway is also included in its continuously upgraded technology.
high-speed railway can run safely at a speed of more than 300 kilometers per hour, which is mainly guaranteed by the following conditions: high-speed trains, ballastless tracks, fully enclosed lines and intelligent traffic signal system. Among these conditions, the high-speed train is the easiest to get, and the track line with perfect performance is the reason for limiting the train speed all the time.
ordinary train rails are fixed by gravel ballast and sleepers. Although the bearing pressure is relatively good, it can not bear the high-speed operation of the train. Ballastless track is to cast the steel rail directly on the concrete, which can ensure that the steel rail will not deform even if the train runs at high speed. China’s high-speed rail tracks are the most advanced track technology imported from Germany. At this point, there are no potential safety hazards. In fact, the principle of intelligent traffic signal system is similar to that of controlling aircraft flight, and it is also a very mature technology.
therefore, to ensure the safety of high-speed railway, a fully enclosed track line is required