Photo: Tokyo Shinagawa TBM launch shaft for the Maglev Chuo Shinkansen

[Miss Maglev]

Image of an N700 Shinkansen train passing by the Tokyo Kita Shinagawa Tunnel Boring Machine launch shaft for the Maglev Chuo Shinkansen.

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2022-02-12_Tokyo_Shinagawa

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Source: @TonamiPlayman https://twitter.com/TonamiPlayman/statu ... dHHuzcnqug Accesseed: 2022-02-12

[latestnews]

[JP] Photo: Tokyo Shinagawa TBM launch shaft for the Maglev Chuo Shinkansen
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2022-06-06 Shinagawa TBM

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Construction site of the "Kitashinagawa emergency exit" of the Linear Central Shinkansen Line in Shinagawa Ward, Tokyo, from the "Asazuru" helicopter of the head office.

Source: https://www.tokyo-np.co.jp/article/181949 Accessed: 2022-06-06

[Miss Maglev]

品川駅
Shinagawa Station

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2022-08-22_Shinagawa_station

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Source: https://www.kenbiya.com/ar/ns/region/tokyo/5978.html Accessed: 2022-08-22

[Miss Maglev]

JR Tokai to Begin Linear Tunnel "Survey Digging" at Three Sites in Kawasaki and Machida by the End of the Fiscal Year, Raising Concerns of Residents Along Line

　JR Tokai plans to begin excavation of the first Metropolitan Area Tunnel of the Linear Central Shinkansen Line in Kawasaki City and Machida City, Tokyo, in fiscal 2022 to investigate vibrations above the ground and their impact on the ground. The company plans to dig with three shield machines over a period of about six months, and then move to full-scale excavation this fall or later. The results of the investigation will be reported to residents in the area.
Tunnel with a diameter of 14 meters, more than 40 meters underground
　Since October 2020, sinking accidents have occurred in the deep underground tunnel construction of the Tokyo Outer Ring Road (Outer Ring Road) in Chofu City, Tokyo, and residents along the linear rail line have voiced their concerns.
　According to JR Tokai, investigations were conducted at the Kajigaya emergency exit (Miyamae-ku, Kawasaki City), Higashi Yurigaoka emergency exit (Aso-ku, Kawasaki City), and Onoji emergency exit (Machida City). All of these tunnels, 14 meters in diameter, will be excavated for 150 to 350 meters toward Nagoya to investigate the impact on the surrounding area.
　After that, full-scale construction will begin in the fall at Kajigaya and Onoji, and at the end of FY2011 at Higashi Yurigaoka, with 200 to 400 meters of tunnel excavation each month. From Kajigaya, full-scale excavation will also begin in the direction of Shinagawa.

　JR Tokai decided to conduct investigative excavation following the sinking accident in Chofu, and began excavation at the Kitashinagawa emergency exit (Shinagawa Ward, Tokyo) in October 2009. However, due to a breakdown of the excavator, the planned 300-meter dig was halted after 50 meters. The excavation of another deep tunnel near Nagoya City, from the Sakashita emergency exit (Kasugai City, Aichi Prefecture), has not progressed since July last year, when the excavator blade chipped during preparation work.

　The Linear Central Shinkansen Line is planned to connect Shinagawa and Nagoya (285.6 km) in about 40 minutes. The project has been delayed until 2015 due to the unresolved conflict with Shizuoka Prefecture, which is concerned about the negative environmental impact of the line. （The project has been delayed until 2015 due to unresolved conflicts with Shizuoka Prefecture, which is concerned about the negative environmental impact of the line.)

◆"Vibration Concerns" and Concerns about the Ground Surface Caving in

　The construction of the first Metropolitan Area tunnel for the Linear Central Shinkansen, which will be excavated to a depth of more than 40 meters, will begin by the end of March at three new sites in Kawasaki City and Machida City, Tokyo, using shield machines (excavators). Although the tunnel is called "investigation," the excavators will finally pass under the feet of the residents along the tunnel, and they are concerned about vibrations during the construction.

　From November last year to January this year, JR Tokai held a total of eight explanatory meetings for residents near three emergency exits, including Higashi Yurigaoka (Asao-ku, Kawasaki City). The plan was to dig a tunnel where linear trains would actually pass through while collecting data on vibration and other issues during the survey excavation, and to take countermeasures if any problems were found before moving on to full-scale excavation.

　The briefing was closed to the press. At a briefing held near the Higashi Yurigaoka emergency exit in late January, participants expressed concern about vibration, sinking and rising of the ground surface, and impact on groundwater, in contrast to JR Tokai's assertion that "adverse effects from the construction are unlikely. There are still many people who do not know that the Linear Line will pass nearby. The company's stance was also questioned.

　The digging began in response to the sinking of the Tokyo Outer Ring Road (Gaikan Expressway), but two of the preceding sites, including one in Shinagawa Ward, Tokyo, have been halted due to equipment malfunctions and other problems. A man in his 80s from Asao Ward, Kawasaki City, who attended the briefing said, "I am worried because the tunnel is underground and cannot be seen by anyone. There is no such thing as safe and secure construction. I want to ask again whether it is necessary to take the risk of building a linear Shinkansen line. (Jo Watabe, Mitsuharu Umeno)

The cause was a mistake in adding an additive to the excavator.

Info translated from Japanese News: https://www.tokyo-np.co.jp/article/228523 Accessed: February 1, 2023 06:00

[maglev]

リニア建設　品川の掘削を3月中に再開　
シールドマシン修理が終わる　
町田の調査掘進は4月以降に
Linear construction Shinagawa excavation to resume in March
Shield machine repairs to be completed
Machida survey excavation to start in April or later
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2023-03-03_Shinagawa_shaft

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Photo: https://static.tokyo-np.co.jp/image/art ... d48a_1.jpg Accessed: 2023-03-03


JR Tokai announced on March 3 that it would resume excavation this month after repairing a shielding machine that broke down during excavation of the linear central Shinkansen line at a depth of more than 40 metres below ground near the Kitashinagawa emergency exit (Shinagawa Ward, Tokyo).

　The excavator was scheduled to dig 300 metres by March 2010, but due to a lack of additives to mix with the soil, soil got onto the front of the excavator and the machine broke down after 50 metres. According to the company, after resuming digging, it will stop after 7 metres, check the condition of the excavator and start digging again by the end of June.

　The excavator at the Onoji Emergency Exit (Machida City), which was scheduled to start excavation this month, will need to be replaced and the start of excavation will be delayed until April or later. The company will start excavation at the Kajigaya emergency exit (Miyamae-ku, Kawasaki City) and the Higashi Yurigaoka emergency exit (Asao-ku, Kawasaki City) this month as scheduled.

Info based on an Japanese Article by Masutake Kato, Tokyo Web: https://www.tokyo-np.co.jp/article/234471 Accessed: 2023-03-03

[latestnews]

Linear tunneling resumes in Tokyo and Shinagawa construction zone, JR Tokai

On 10 January, JR Tokai resumed the excavation of an underground tunnel for the Linear Central Shinkansen near Shinagawa Station using a shield machine, which had been suspended since last spring. The company plans to excavate a total of about 300 metres by the end of 2023.

The linear line will pass through the "deep underground" area, which is more than 40 metres underground in urban areas. According to the company, it began excavation in October 2003 in the construction area near Shinagawa Station, the first station on the line, to investigate surface vibrations and the effects on the ground and structures. However, due to equipment failures and other problems, the work was halted in March last year after digging had reached about 55 metres.

JR Tokai plans to decide on future plans after completing the survey and informing local residents. In the past two years, there has been an accident involving deep underground construction, when a road in a residential area collapsed during the construction of the Tokyo Outer Ring Road in Chofu City, Tokyo.

Translated infos from Source: https://www.sankei.com/article/20230510 ... CMSMKJUGA/ 2023/5/10

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2023-05-10_Sankei

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Photo from Source: https://www.sankei.com/article/20230510 ... CMSMKJUGA/ 2023/5/10
JR Tokai unveiled to the press a shield machine that is used in the construction of an underground tunnel for the Linear Central Shinkansen Line in Kobe City in January 2020.