4.9 km Matsukawa Maglev Tunnel

User avatar
Miss Maglev
Posts: 370
Joined: 23. Apr 2021, 13:30

4.9 km Matsukawa Maglev Tunnel

Unread post by Miss Maglev »

ida City: Excavation begins at Matsukawa section of the Central Alps Linear Tunnel

Image

 On September 6, the excavation of the Matsukawa section (4.9 km) of the Central Alps Tunnel for the Linear-Maximum Speed Rail in Iida City began. The excavation of the slanting tunnel (construction tunnel) began in Myokoto Park in Dingiriishi, Iida City, aiming to start digging the main tunnel in 2022. The excavated soil will not be left temporarily, but will be transported directly to sites in and outside the city for use. This is the first tunnel excavation in the city.

 Initially, JR Tokai had planned to excavate the tunnel directly from the main shaft of the Chuou Alps Tunnel, but changed its mind and decided to dig the tunnel at the construction yard. "We knew it would be steep, but the ground surface was more fragile than we expected, so we want to proceed with construction while installing a slanting shaft and doing thorough slope work," he said.

 The construction tunnel will be about 380 meters long and will be closed after the work is completed.

 After the revision of the construction plan, the maximum number of vehicles to be used for construction is 270 per day (one way), which is the same as before the revision of the plan. The main purpose of the vehicles is to transport the remaining soil and materials, with the peak capacity of 60 vehicles for materials and 210 vehicles for remaining soil.

 A temporary construction pier over the Matsu River connects the prefectural road Iida-Minamikiso line on the left bank with the city road Oyu-Myokoto line on the right bank, and the vehicles transporting the remaining soil travel one-way on both lines. The vehicles will mainly use the Chuo Road and the San-En-Nanshin Road to transport the overburden to the site.

 For about a year, until next summer, it will be transported to a site in the Ashima district of Takagi Village, using the Iida-Minamikiso Line, the Haba-Osegi Line, and National Route 153 (Apple Road). A maximum of 80 vehicles per day (one way) will be transported.

 About 1.85 million cubic meters of soil is expected to come out of the three pits in the city, 900,000 cubic meters from the Matsukawa construction area, 500,000 cubic meters from the Kuroda construction area, and 450,000 cubic meters from the Kamigo construction area.

  The main shaft is planned to be 13 meters wide and 8 meters high, with an excavation cross-sectional area of about 100 square meters. The maximum soil cover is about 600 meters at a point about 3.2 kilometers west of the mine mouth. Due to delays in the preparatory work, the construction period is expected to be extended by one year and four months, and the construction period of the Matsukawa section of the Chuou Alps Tunnel will end in September 2026.


Info based on Summary of Japanese Media report: [ Monday, September 6, 2021 3:56 pm ] https://minamishinshu.jp/news/linear/%E ... 8C%BA.html
頻繁に日本で、頻繁にヨーロッパで。ツイッターはたまに。フェイスブックやWhatsappは使わない。

User avatar
Miss Maglev
Posts: 370
Joined: 23. Apr 2021, 13:30

Kawasaki City Maglev Tunnel: Residents' worried

Unread post by Miss Maglev »

リニア中央新幹線 区民「地盤調査しっかりと」 外環道事故受け、説明会

Translated from Japanese. Source: https://www.townnews.co.jp/0205/2021/09/10/590941.html Accessed: 2021-09-12

 Last month, JR Tokai held an explanatory meeting for residents at the Asou Civic Center regarding the shield tunnel for the Linear Central Shinkansen. The briefing was held in response to a ground surface sinking accident that occurred during the deep underground shield tunnel construction of the Tokyo Outer Ring Road (Tokyo Gaikan). The company explained to the residents that it would take safety measures and conduct a survey of houses around the planned route.

 In the urbanized areas of Tokyo, Kanagawa and Aichi prefectures, the Linear-Motorcycle Central Shinkansen is planned to be constructed by digging a 14-meter diameter tunnel underground. In Kawasaki City, the line will run from Nakahara Ward to Katahira in Asao Ward, with emergency exits at five locations (Todoroki, Kajigaya, Inuzura, Higashiyurioka and Katahira).

 This briefing was closed to the media. According to the materials distributed at the venue, the emergency exit at Higashi-Yurigaoka was completed in August. The sinking of the Tokyo Outer Ring was attributed to the special ground and the special work involved.

 For residents living near the planned route, he also mentioned that a survey of buildings within 40 meters of the tunnel end would be conducted.

A flurry of questions from residents

 According to a 68-year-old man living in Katahira who attended the briefing, nearly 100 people attended the meeting. According to the man, 68, a resident of Katahira who attended the briefing, nearly 100 people attended the meeting and asked many questions about the sinking of the Tokyo Gaikan. In response, JR Tokai explained that the construction method for the new tunnel would be different and that construction management would be strengthened. The residents also requested that the house survey be conducted on the target households and that a more detailed ground survey be conducted. The man said, "I've lived in the area for a long time and I've heard that the ground is solid with hard bedrock, but I want a thorough survey of the top of the tunnel.

 According to the document, JR Tokai plans to distribute fliers to the households near the emergency exits at Higashi-Yurigaoka and Katahira in Asou Ward to request their cooperation in the future. At the same time, the company plans to hold a series of detailed explanatory meetings on the shield tunnel excavation work.


Translated from Japanese. Source: https://www.townnews.co.jp/0205/2021/09/10/590941.html Accessed: 2021-09-12
頻繁に日本で、頻繁にヨーロッパで。ツイッターはたまに。フェイスブックやWhatsappは使わない。

User avatar
Eurorapid
Posts: 266
Joined: 17. Apr 2021, 23:08

[JP] diagonal shaft work Matsukawa Maglev Tunnel excavation completed

Unread post by Eurorapid »

ida City: Completed excavation of work tunnels for the Matsukawa section of the Central Alps Tunnel of the Linear Central Shinkansen Line

 Excavation of the diagonal shaft (work tunnel) in the Matsukawa construction section (4.9 km) of the Linear Central Shinkansen Central Alps Tunnel in Iida City has been completed. On January 9, it was learned that the excavation of the diagonal shaft (work tunnel) from Ding Kirishi's Myoqin Park to the planned site of the main tunnel (main tunnel) was completed. JR Tokai has stated that excavation of the main tunnel will begin "as soon as it is ready," and is expected to start in the direction of Nagoya. This will be the first excavation of the main tunnel in the city section. The work tunnel is approximately 380 meters long. Digging began last September and reached the main tunnel intersection this month.

 JR initially planned to excavate directly from the main tunnel, but changed the plan to excavate the tunnel by setting up a tunnel entrance in the construction yard. JR stated, "The ground surface was more fragile than we had anticipated.

 The main tunnel is 13 meters wide and 8 meters high, with an excavated cross-sectional area of approximately 100 square meters. The maximum earth cover is approximately 600 meters at a point about 3.2 km west of the mine entrance. The construction period is expected to be extended by one year and four months due to delays in the preparation work, and the Matsukawa construction section will be completed by September 2026. The construction period of the Matsukawa section will last until September 2026. The work tunnel will be closed after construction is completed.

 Excavated soil will not be temporarily stored and will be directly transported to the Shimokuken, Tatsue Industrial Site, and Kuroda construction area for utilization in the city.

  The number of construction vehicles is scheduled to be up to 120 vehicles per day (one-way) until mid-August.

 The overburden from the three mine entrances in the city is expected to total approximately 1.85 million cubic meters, with the Matsukawa construction area accounting for approximately 900,000 cubic meters, the Kuroda construction area for The Matsukawa construction area is expected to produce approximately 900,000 cubic meters.

 The Matsukawa construction area will be constructed by the Japan Railway Construction, Transport and Technology Agency on behalf of JR, and a joint venture (JV) of Toda Corporation, Aomi Corporation, and Yahagi Construction Industry Co. The tunneling work will be done using the NATM method, which is suitable for mountain tunnels, and the tunnel will be excavated in a westerly direction, with the excavation area being hardened with sprayed concrete and bolts.

Infos based on Source: https://minamishinshu.jp/news/linear/%E ... 83%8D.html Accessed: July 19, 2022 3:59 pm
Not active on Twitter (X) anymore. Too much spam and rubbish there, not much serious stuff.

Post Reply