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2020.11.12
Tokai News
On Thursday, November 12, 2020, a huge hole near Nagoya Castle was opened to the press.
This is a facility related to the Linear Chuo Shinkansen. The name is also “Meijo’s emergency exit”. What is it for?
Shield Machine Start Base
JR Tokai is proceeding with the construction of the Linear Chuo Shinkansen at various locations with the goal of opening in 2027. Linear, which rises to 500 km / h, connects Shinagawa and Nagoya in a minimum of 40 minutes, and plans to extend to Osaka in the future in a minimum of 67 minutes.
In the highly urbanized metropolitan area and central area, it is not possible to build a linear line on the ground, so a shield tunnel will be dug into the underground space to pass (about 24.8 km in Aichi prefecture is the full section of the tunnel). ). To do so, we must first create a facility to send the digging shield machine underground. That’s this standing pile (emergency exit).
Standing piles are installed at approximately 5 km intervals, and when a linear line is built, excavation will be carried out from this standing pile to the standing pile in a protection tunnel. There are other Katsukawa emergency exits, Sakashita emergency exits and Shinryo emergency exits in Aichi prefecture. From the recently released Meijo emergency exit, first excavate towards Shinagawa (Katsukawa emergency exit) and then towards Nagoya Station. Go.
Even after the start of the linear business, the standing pile will be used for ventilation in the tunnel, passenger evacuation route in case of anomaly and maintenance work. By the way, the depth of the Meijo emergency exit is about 89.1 m from the ground and the diameter is about 41 m. It is equipped with an elevator and ventilation equipment (fan).
Indeed diver
Construction of the Meijo emergency exit began in November 2016 and excavation to the bottom was completed in June this year. The news was released on September 19 when the concrete placement with a lower surface of about 5.6 m was completed.
If you look from above, you can see that the elevators and stairs are glued to the outer wall, and the people working below look like beans. The reporter is not afraid of heights, but when I looked from this height, I felt a “hug” feeling. It’s like looking at the ground from the roof of a high-rise building.
While interviewing today, I actually dove into this huge hole. From here, focus on photography …
It’s a little scary to look down, but when I see construction progress steadily in places that I can’t normally enter, I can feel the Linear Chuo Shinkansen moving towards completion.
Spring water and soil contamination have no effect on linear opening time.
From now on, the construction of the side wall will continue and the Meijo emergency exit will be completed in July 2022. After that, we will assemble the shield machine and hold a briefing for the locals, and we plan to drill Shinagawa first. and then to Nagoya. The construction of the Meijo emergency exit has been delayed by about a year and a half due to contamination of the spring water and soil, but it appears that there will be no impact on the opening in 2027.
Masahiro Tanaka, General Manager of Nagoya Construction Department, JR Tokai Chuo Shinkansen, said, “We have been able to proceed steadily with the construction of the Meijo Emergency Exit thanks to the understanding of the local population and the cooperation of the people. involved, including Aichi Prefecture and Nagoya City. I think that’s the case. ” He expressed his intention to proceed steadily with construction, emphasizing the three points of construction safety, environmental conservation and cooperation with the local community.
Text / Photo: Masahiro Ichihashi
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