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Heavy rains and heavy irrigation caused the Houtong section of Taiwan’s railways to climb the mountain on December 4, and a large amount of dirt and rocks buried the track, leading to the disruption of the railway to the east. Taiwan railways are expected to resume single track operation on December 13. It is also the longest break between the eastern and western railways.
At the time, a shuttle bus carrying hundreds of people was driving in the landslide. A few days ago, engineers who had been stationed at the site monitored and found abnormal emergency notifications, braked and survived. However, according to videos and photos provided by readers recently received by “Apple News”, the slope of the Houdong stretch of the highway on November 30 had a precursor to the mountain. After the Taiwan Railways completed the temporary fumigation measures on the morning of December 3, I was eager to open up to traffic, but at that time the value of the route monitoring headspace had decreased, showing that the slope continued to slide. The movie captured a gruesome and dangerous scene of a shuttle train passing by and breaking the tripod.
However, Taiwan’s Zeng Railway remained open to traffic until an accident occurred while walking up the mountain on December 4 the following day. Right now, if monitoring personnel find the collapse and immediately notify the train to stop, 400 people would be buried alive.
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An anonymous relative of an engineer broke the news to Apple, noting that according to the Taiwan Railway Outflow video on December 3 that trains were passing, and internal data from Taiwan Railway Monitoring, the Houdong section had signs of going uphill. The 30th of November. Telephone poles were severely skewed and offset. From the same day, frontline personnel from the Taiwan Railways worked overtime to make emergency repairs, as well as 24-hour shifts to monitor the section of road, and smoked with nets until it was completed the morning of December 3.
◆ The headroom value keeps decreasing, which means that the mountain wall gets closer to the track.
The author noted that the internal notification at the time indicated that it was a “temporary measure”. The on-site monitoring value also found that the value of the route authorization had decreased. However, the Taiwan Railway still rushed to issue the “Opening Announcement”. After opening, the on-site tracking value continued to decline. From 1770 to 1757, it means that the slope and the mountain wall have been falling and changing, making the free distance between the track and the mountain wall shorter and shorter, but the Taiwan railway is still open to the traffic.
As Taiwan Railways had a sliding slope Houdong = Ruifang at around 1 pm on November 30, the Xizheng line was blocked for emergency repairs. On December 3, Taiwan Railways issued a press release around 9 a.m. to announce the opening to traffic was resumed and it was reported that at 6:40 a.m. the West Main Line had been quickly crossed, electricity was restored and the opening of two lanes was resumed, but the speed limit of this section was 30 kilometers slower.
According to internal monitoring data from Taiwan Railways, at 7:45 am on December 3, the headroom value was 1775. At 9:25, the route’s headroom value was 1770. After 2 pm, it dropped back to 1765, and even after night. Around 1757, at 7 am on December 4, it was observed that the clearance value of the route was only 1730, and the slope changed significantly.
According to the complainant, according to the monitoring data, it was found that the movement of the slope continued to occur. In the early morning of December 4, the monitoring staff even found that the shotcrete emergency measures could not withstand the collapse, so they stopped the train that was about to circulate, and then the landslide occurred.
◆ Tripod on 12/3 train kicks off by passing sparks
The person who broke the news said that this shotcrete method was originally a temporary emergency repair method and that there was no way to completely solve the problem. On December 3, the tram was turned on and the cleaning value of the route monitoring the mountain wall has been decreasing, and the relevant situation was reported to Taiwan. Iron, but the Taiwan Railroad still decided to drive. If the observation team did not observe it for 24 hours on December 4, it would discover that the grout-mounted wall had started to collapse and inform the train to stop. This time, 400 people could have been buried alive.
According to the Taiwan Railway Outflow video, he was suspected of being a surveillance personnel on December 3, while monitoring the train’s passage while filming. Unexpectedly, after a type 500 shuttle car passed, a small spark appeared as the first pantograph passed over the train. Wait until After the second pantograph passed, not only violent sparks came out, but the tripod of the tram line was ripped off, scaring the photographer even the mobile phone.
The family members expressed their discontent that the reason they decided to break the news today is because they cannot bear the announcement of the opening of the Taiwan Railways. Obviously, there will be sparks when the train passes, and it is still difficult to open. It really is an exaggeration to continue with this process.
Taiwan Railways indicated that 12 km + 233 meters from the main west line of the Ruifang-Houdong Railway, due to continuous heavy rains and close to the slope, a slope slip was encountered in the afternoon of November 30, which it affected the electric poles and caused an abnormal tram line. After emergency treatment, the tram line was adjusted to normal position and traffic resumed, and personnel were dispatched to monitor slope conditions at the site.
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The Taiwan Railroad said monitoring personnel found that the slippage of the slope intensified due to continued rain overnight. Considering driving safety, the West Main Line was blocked at 7:29 am on December 1, and the Dong Main Line was running slowly in both directions. Initiate emergency repair operations and establish a world-class response center to coordinate and control various operations. The sliding slope containment structure was urgently removed at the site, sprayed concrete was applied for emergency slope protection, and temporary power poles were installed. Emergency repair work was completed on December 3, and two-lane traffic was restored. Once the weather improves, works will be carried out to reinforce and improve slopes.
The Taiwan Railways stressed that once traffic is restored with emergency slope repair, the Taiwan Railway Bureau will continue to dispatch personnel to monitor slope stability for 24 hours and use the trains to pass slowly to ensure safe driving. The operation of the related trains and the safety of the routes are also controlled by the Taiwan Railways Dispatch Headquarters. The engineering unit is closely monitored.
The Taiwan Railway staff privately stated that the Taiwan Railways monitored clearance values and grade conditions 24 hours a day in shifts. However, due to the transportation responsibility of the Taiwan Railways, the route was interrupted or delayed for several days, affecting tens of thousands of people, and evacuation and security had to be dealt with. Therefore, through the monitoring method, even if the train is open to traffic, the first passing train is required to stop at the stop line and wait for the monitoring personnel to confirm the condition of the slope, adopt a train to release and ensure safety through the monitoring mechanism. This time it is also due to the monitoring mechanism. Therefore, the train did not go through the collapse zone.
The Taiwan Railway also explained that continuous heavy rains in the Houdong area caused excessive water content in the soil and rock in the anticline strata, causing cracks, leading to the large-scale collapse of the original sliding section of the slope. and interrupting the main east and west lines. The current site is urgently repaired. The work construction method adopts the stepped method to brush the slope and handle the reinforcement of steel rail piles.
The Taiwan Railroad originally estimated soil and rocks to shed about 4,000 cubic meters, and traffic was expected to resume on December 8. However, due to continued heavy rains in the morning of December 6, the scale of the soil collapse expanded by approximately 10,000 cubic meters. The current assessment will take about 3 days to complete. Cleanup and transportation of earthworks, track restoration project, power and signal for approximately 2 days. The Dongzheng line is expected to be repaired on December 13. The improvement of the future long-term project has been investigated and analyzed by the engineering consulting company. Chaoyiming Tunnel Carry out planning work to ensure the stability of the slope of the road section. (Li Zihui / Taipei Report)
