Linear Chuo Shinkansen reveals excavator for digging underground tunnels in urban areas January 29 16:03
A large-scale excavator that digs a tunnel deep underground in an urban area where underground structures are concentrated has been completed on the Linear Chuo Shinkansen, which is under construction with the aim of opening in 2027, and it has been released to the press.
The published excavator is called a "shield machine", about 14 meters in diameter, and has about 700 hard alloy blades in front of it called "bits" that cut the ground.
The Shield Machine can dig deep into the ground and at the same time build the walls of the tunnel, so the total length of the 286 km between Shinagawa and Nagoya on the Linear Chuo Shinkansen is approximately the combined urban area where underground structures are concentrated. Used for 50km sections.
In addition, since tunnel construction is performed under the depth of 40 meters or more called "deep underground", there is also a function that can automatically change bits according to the condition of hard ground, etc., and 400 meters on average per month That is, you can build a tunnel that is as small as possible.
JR Tokai will carry the shield machine to the construction site in Shinagawa-ku, Tokyo, and after that, after confirming safety, etc., will begin excavation work from the beginning of the third year of Reiwa.
"While deep underground construction has little impact on the ground, it is necessary to respond to high water pressure, etc.," said JR Tokai Chuo Shinkansen Construction Dept. I want to come. "