What was the reason for the derailment accident of the bullet train on July 23rd, 211?

According to the official report, I think

1. The weather affected the train D3115 and the train D 31 were delayed one after another, and the driving environment was quite bad

2. For some reasons, the dispatcher released the train D3115 and detained the train D31, making it late for one night (the reason for the two cars reversing their departure order is related to the news that one party did this). The dispatcher of the Shanghai Bureau to which the train D3115 belongs is biased in order to make the train of his own bureau not late or less late. On the other hand, the D31 train was already late before entering the Shanghai Bureau, which made the D31 inexplicably become the main culprit of the accident in order to reduce the related losses due to the delay of one train.)

3: The reason < P > The bad weather caused the centralized chain equipment of Yongjia direction 3 of Wenzhou South Railway Station to be unable to approach the red belt. Normal use (it is also reported that it is a device similar to monitoring equipment. When there is a car running on it, this line is a red light band on the console of the station. This line is divided into 1, 2, 3 from the station section near the station. The reason why the approaching section is said to be an accident is because D3115 did not enter the section at that time, but the section showed a red band indicating that there was a car in the section.)

4: After passing through the red band of three approaches, what you saw before D3115 entered the three approaches in the previous section must be a red light, because the signal fault three approaches was mistakenly identified as a car by the system. Under normal circumstances, D3115 had to stop outside the signal. Make D3115 enter Wenzhou South Railway Station normally. Similarly, in order to ensure safe operation (this is a bit of a batting practice now), the dispatcher issued an order that the D3115 train runs at a red light at a speed of 2 kilometers per hour, and immediately stop if it is abnormal. The same order is given. The D31 train at the rear runs according to the signal display. At this time, the barrier between the two cars has only one interval signal light (this stipulates that if it is normal, The situation is very normal, even if it is abnormal, it can be said that there are many reasons for the red band of the line in the past, such as line damage, such as the line being soaked in rain, which is not only caused by lightning. Therefore, it is very correct to order D3115 to run at a speed limit. The only irrational thing is to make D31 run according to the signal regulations. Normal people will think that the signal is faulty and see if the signal is reliable. However, from the experience of working in the railway for many years, it is quite difficult to repair the red band of the general line and turn on the green light. . . Don't say it's a coincidence that it can't be repaired)

5 fuse

The signal light of the defeated family actually turned green, and it actually turned green when it was still running in the section for D3115 times. .

It is ridiculous to say that it is red when there is no car, but it is green when there is a car. Are all the departments that design this signal color blind? Can make such a huge loophole in the protective device

6 Results

D31 times have been delayed. With the dispatcher's permission, there is a green light all the way to change who is not running all the way. Fortunately, the driver also knows that the fast-forward station has controlled the speed, but it is already late when he finds the car ahead. It is difficult to stop the train in time even if the iron wheel does not move, not to mention the inertia of speed, which makes it impossible to directly lock the wheel even if the speed is controlled as much as possible, so he hit it. . . .

I can't explain some doubts, and I'm surprised

1, About the running state of D3115 when it was rear-ended, the information published by the railway before was that lightning struck and stopped, and now it was the speed limit. The results of these two States were completely different. Some local villagers said (the news was unconfirmed) that D3115 was stopped first and then the rear-end collision was seen. Of course, this is not directly related to the accident. Whether it is stopping or walking slowly, it must be collided, but it must be clarified because it is related to the railway department. Is it lying about the attitude of the door to the public when dealing with accidents? Of course, this problem is also well solved. I believe that passengers on D3115 can clearly know whether they were parked or running before the rear-end collision.

2. I don't know the related technology of this major about signal failure, but the reason is ridiculous. If you enter the red light zone, you can restore the signal, then why do you need to fix it? Just find a car to walk around. . . .

3. It is said that the legendary automatic braking system can effectively prevent rear-end collision. It is explained that it can't be used normally because it is switched to the emergency station control. This design is really a chicken rib, and it can effectively prevent drivers from fatigue driving and other reasons from causing accidents. But in recent years, how many accidents are mainly caused by drivers' fatigue driving? The signal accounts for most of it, but it is useless to rely on the signal when designing. In addition, there is no report that the contact device is damaged, and the front car is very controlled. The equipment of the rear car is intact and close to the section. How long does it take for Wenzhou South Railway Station to run at the specified speed? How long does it take for D3115 times to limit the speed? The specific location and so on? Wenzhou South Railway Station should issue an early warning to D31 times in time according to these conditions, but what are they doing?

4、 Speaking of signals, I suddenly have an idea whether it is the interval signal fault or the station control system fault. If it is the latter, it is really possible for D31 to see the green light after switching to the emergency station control. D3115 has disappeared in the monitoring system, so it is not all the way to the green light for D31. Of course, this premise is that the interval signal is not faulty, which means that the green light that D3115 first saw is also the green light. It was because the dispatcher mistakenly thought that the interval signal was faulty that the speed limit was stopped (it was reported that the driver of D3115 said such a sentence after getting off the bus, but they told me to stop, which was somewhat consistent with my idea). Of course, I don't want this to happen. If the result of the accident is like this, the nature of the accident will be extremely bad because of the blind command of the dispatcher and the dispatch of the station driver. The liability accident caused by the incomplete connection of these three aspects is more terrible than the natural disaster. < P > The above is a personal opinion and does not represent any institution or organization. In all fairness, I hope that the attitude of the railway department is sincere and the report is true, and I also hope that the real reason can be found to prevent such accidents from happening.