Tunnel Cave-In Kills Worker at Maglev Construction Site

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Miss Maglev
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Tunnel Cave-In Kills Worker at Maglev Construction Site

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Tunnel Cave-In Kills Worker at Maglev Construction Site
A tunnel cave-in occurred at a magnetic levitation train line construction site in the central Japan city of Nakatsugawa, Gifu Prefecture, on Wednesday, killing a worker there and injuring another, according to local police and other authorities.
[...]

Two workers at the site, men in their 40s and 50s, respectively, were taken to a hospital, with one of them, presumably the one in his 40s, later confirmed dead. The worker in his 50s suffered a bone fracture in his right leg. No one else was injured.

The accident happened about 60 to 70 meters from the ground surface, according to Central Japan Railway Co.[...].
Source: https://www.nippon.com/en/news/yjj2021102701186/ Accessed: Ocotber 27, 2021.
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Re: Tunnel Cave-In Kills Worker at Maglev Construction Site

Post by Miss Maglev »

2021-10-28 Tunnel Cave-in
2021-10-28 Tunnel Cave-in
K10013324801_2110272204_2110272204_01_04[1].jpg (17.96 KiB) Viewed 687 times
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Source: https://www3.nhk.or.jp/news/html/202110 ... 01000.html Accessed: October 28, 2021
At around 7:20 p.m. on the night of the 27th, a construction worker reported to the fire department that there was a collapse at the construction site of the Seto Tunnel of the Central Linear Railway in Nakatsugawa City, Gifu Prefecture.

According to the police, two male workers were caught in the collapse and transported to the hospital, where Takayuki Koita, 44, of Mihama Town, Fukui Prefecture, was confirmed dead. [...] Another 52-year-old man was seriously injured, breaking bones in his leg and hip.

According to JR Tokai, five workers were digging a 600-meter emergency exit tunnel leading to the main line at the time. T [...]
[...] The Seto Tunnel is a 4.4-kilometer tunnel in Nakatsugawa City, which began construction in January of last year. 10% of the tunnel for the emergency exit had been excavated by the 27th.

According to JR Tokai, this is the first time that a fatal accident has occurred during the construction of the Central Linear Railway.
Source: https://www3.nhk.or.jp/news/html/202110 ... 01000.html Accessed: October 28, 2021
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Tunnel Cave-In Kills Worker at Maglev Construction Site

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2021-10-28 Tunnel Cave-in II
2021-10-28 Tunnel Cave-in II
b_14797008[1].jpg (17.24 KiB) Viewed 686 times
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Photo from Japanese News https://www.kobe-np.co.jp/news/zenkoku/ ... 6688.shtml Accessed October 28, 2021.
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At around 7:20 p.m. on the 27th, a 119 call came in reporting a collapse at a construction site in the Seto Tunnel of the Central Linear Shinkansen Line in Seto, Nakatsugawa City, Gifu Prefecture. According to the prefectural police and JR Tokai, two male workers who were blasting were injured and taken to the hospital, where one of them died.

The main tunnel of the Seto Tunnel is about 4.4 kilometers long. According to JR Tokai, the collapse occurred at a point about 70 meters from the entrance of the emergency exit tunnel.

[...]

JR Tokai reported the accident on the night of March 27. The MLIT is considering how to respond.
Translated from Japanese News https://www.nikkansports.com/general/ne ... 01218.html Accessed October 28, 2021.
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Re: Tunnel Cave-In Kills Worker at Maglev Construction Site

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2021-10-28_Asahi
2021-10-28_Asahi
66e9ffea91384637785a07776ac0fa99[1].jpg (71.82 KiB) Viewed 681 times
Source: Asahi: https://www.asahi.com/ajw/articles/14469990 Accessed: 2021-10-28
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2021-10-28_NHK
2021-10-28_NHK
K10013325151_2110281219_2110281223_01_05[1].jpg (44.66 KiB) Viewed 681 times
https://www3.nhk.or.jp/news/html/202110 ... 51000.html Accessed: 2021-10-28
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When emergency responders arrived at the scene, the two workers had been taken outside the tunnel by their colleagues, the Nakatsugawa fire department said.

The two were taken to a hospital in Nakatsugawa, but Takayuki Koita of Mihama, Fukui Prefecture, was confirmed dead there.

The other worker, a 52-year-old from Nagakute, Aichi Prefecture, suffered bone fractures in his left foot, chest and hip.

The accident took place 70 meters from the tunnel entrance where the workers were inspecting the site after dynamite had been set off to dig deeper into the tunnel, according to JR Tokai. This tunnel will be about 600 meters long upon completion and used to carry building materials for the construction of the 4.4-kilometer Seto tunnel, part of the Linear Chuo Shinkansen Line.

[...]

Tunnel-related accidents have [...] occurred in the project, including one in Nagano Prefecture in 2017 and another in Nakatsugawa in 2019.

But the Oct. 27 accident was the first fatal one, the company said.
Source: Asahi: https://www.asahi.com/ajw/articles/14469990 Accessed: 2021-10-28
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JR Central halts works on maglev tunnel after fatal incident

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JR Central halts works on maglev tunnel after fatal incident
Central Japan Railway Co., or JR Central, said Thursday that it has halted construction work on mountain tunnels for its maglev Shinkansen train line, following a deadly tunnel collapse the previous day.
[...]

The company said that it will implement safety measures, including a thorough check of work procedures.

[...]

According to the company, the incident occurred when workers were digging around 70 meters into an emergency exit tunnel for a 4.4-kilometer main tunnel at around 7:20 p.m. on Wednesday.

The leg of the 44-year-old worker who was killed got caught in the fall of rocks, in response to blasting work involving explosives. Rocks collapsed again just as a 52-year-old worker tried to rescue him.
[...]

The Gifu prefectural police inspected the accident site on Thursday afternoon. The police will look into the details of the circumstances at the time of the incident, suspecting possible professional negligence resulting in death and injury.
Source: Japan TImes https://www.japantimes.co.jp/news/2021/ ... nel-death/ October 31, 2021
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JR Tokai resumes construction in eight linear sections

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JR Tokai resumes construction in eight linear sections


 On November 1, JR Tokai announced that it had resumed excavation work in eight of the 14 construction zones that had been suspended following the collapse of the Seto Tunnel on the Central Linear Shinkansen Line in Nakatsugawa City, Gifu Prefecture.
Source: https://www.shimotsuke.co.jp/articles/-/518491 Accessed: November 1, 2021
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JR Tokai to postpone groundbreaking ceremony for Gifu station

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JR Tokai to postpone groundbreaking ceremony for Gifu station

Following a tunnel collapse accident on the Linear Central Shinkansen line that killed and injured two workers, JR Tokai has announced that it will postpone the November 10th "safety and groundbreaking ceremony" for the Gifu Prefecture linear station to be built in Nakatsugawa City.

 The groundbreaking ceremony was scheduled to be attended by JR Tokai President Shin Kaneko, Gifu Prefecture Governor Furuta, and local officials.

 Construction of the Seto Tunnel has been suspended until the cause of the accident can be determined, and there is no timetable for reopening the tunnel.


Info based on Japanese Media reports. https://news.yahoo.co.jp/articles/0c90f ... f15bb0b235 Accessed: November 2, 2021.
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Man injured in 2nd accident at maglev construction site

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Man injured in latest accident at central Japan maglev construction site
2021-11-09_Mainichi_Tunnel_mainichi.jp/english/articles/20211109/p2a/00m/0na/019000c
2021-11-09_Mainichi_Tunnel_mainichi.jp/english/articles/20211109/p2a/00m/0na/019000c
Screenshot 2021-11-09 at 23-11-49 Man injured in latest accident at central Japan maglev bullet train construction site - T[...].png (1.01 MiB) Viewed 606 times
NAGOYA -- A worker has sustained injuries to his right leg after sediment collapsed at a Linear Chuo Shinkansen maglev train line tunnel construction site [...], in what is the second accident on the project in less than a month.

[...]

JR Central said that some 5 cubic meters of earth, weighing about 10 metric tons, collapsed at around 8:20 a.m. on Nov. 8 from the surface of an excavated section inside a tunnel being used to build the Linear Chuo Shinkansen's Ina Mountains tunnel in the central Japan village of Toyooka, Nagano Prefecture.

The accident took place about 200 meters from the surface entrance, when eight workers were setting explosives in the tunnel to blow up bedrock. One noticed a growing fissure in the concrete sprayed onto the excavation surface, and was evacuating when the earth collapsed and sediment hit the right leg of a man in his 50s who reportedly suffered minor injuries.
(Japanese original by Shiho Sakai, Nagoya News Center)

Source: https://mainichi.jp/english/articles/20 ... na/019000c Accessed: 2021-11-09
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JR Tokai to Establish Council to Prevent Recurrence of Accidents

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JR Tokai to Establish Council to Prevent Recurrence of Accidents in Linear-Maglev-Shinkansen Construction

Image

November 17, 2021 7:19 PM

In the wake of a series of accidents in the tunnel construction of the Linear Central Shinkansen, JR Tokai President Shin Kaneko has announced plans to establish a "safety promotion council" with 12 companies that have been commissioned to work on the project.

Last month, two workers were killed and injured in a collapse at a tunnel construction site in Nakatsugawa City, Gifu Prefecture, and on the 8th of this month, one worker was injured when earth and sand collapsed at a tunnel construction site in Toyooka Village, Nagano Prefecture.

[...]

President Kaneko [...] announced his plan to establish a "Safety Promotion Council" with 12 companies, including Obayashi Corporation and Kajima Corporation, to prevent a recurrence. The councils will be established in each of the seven prefectures along the railway line, and the first meeting is scheduled to be held in Tokyo on the 24th of this month to share information on safety measures.

[...]


Source: https://www3.nhk.or.jp/news/html/202111 ... 81000.html Accessed: November 17, 2021
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Safety promotion council (tunnel construction)

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事故防止のための情報を共有…リニア工事の安全推進協議会 中津川市等で初会合 トンネル事故受けJRが設置


First meeting of the Safety Promotion Council for Linear Maglev Construction

In the wake of a series of accidents involving tunnels on the Central Linear Railway Shinkansen in October and November, a safety promotion council was established to share information to prevent a recurrence [...].

 In October, two workers were killed or injured in a tunnel collapse in Nakatsugawa City, Gifu Prefecture, and in November, another worker was injured in Toyooka Village, Nagano Prefecture.

 In response, JR Tokai established safety promotion councils at its headquarters and in seven prefectures along the railway line, [...].

 The first meeting was held on the 25th in Nakatsugawa City and other places. A total of 39 people from JR Tokai and the construction companies undertaking linear construction in Gifu Prefecture attended the meeting in Nakatsugawa City, where they were briefed on the two accidents and shared information on how to prevent accidents.

 The meeting will be held every month until the construction is completed.


Translated form yahoo Japan. https://news.yahoo.co.jp/articles/48e13 ... 0eb449f6f4 Accessed: Novemebr 25, 2021
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Gifu governor urges JR Central to reexamine safety measures for linear maglev construction

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岐阜知事ら、安全対策の再点検要望 リニア工事でJR東海に
Gifu governor urges JR Central to reexamine safety measures for linear maglev construction

 On November 29, Governor Hajime Furuta of Gifu Prefecture and the mayors of seven cities and towns in the prefecture issued a letter of request to the Central Japan Railway Company (JR Tokai) to prevent the resumption of tunnel construction in the prefecture until the cause of the accident is investigated and measures are taken to prevent a recurrence. On the 29th, Governor Hajime Furuta and the mayors of seven cities and towns in the prefecture submitted a written request to JR Tokai President Shin Kaneko, asking him not to resume tunnel construction in the prefecture until the cause of the accident is investigated and measures are taken to prevent recurrence.

 The letter of request called for a re-inspection of the Seto Tunnel to determine if there are any problems with the safety measures taken in the construction of the tunnel, and for careful explanations and information to be provided to the communities along the route. It also asked for a report on the results of the verification of the construction accident at the Ina mountain tunnel in Nagano Prefecture.

 Governor Furuta visited the head office of JR Tokai (Nakamura Ward, Nagoya City) and said, "I hope that the (linear) project will be completed by 2027. Mr. Kaneko, president of the company, said, "We must prevent any recurrence.


Translated from Japanese Media report. Source: https://www.chunichi.co.jp/article/374489 Accessed: November 29, 2021.
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Going Forward is Hell, Going Backward is Hell

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JR東海「リニア新幹線」進むも地獄・退くも地獄
JR Tokai's "Linear Shinkansen": Going Forward is Hell, Going Backward is Hell


The Linear project that can't be withdrawn 


Translated from Japanese Media. Source: http://www.zaiten.co.jp/article/2021/12/post-335.html Accessed: 2021-12-01

Image



According to the "Environmental Impact Assessment" released by JR Tokai in August 2002, the only geological survey for both the Seto and Sakashima emergency exits was a literature survey. In other words, there was no actual field survey. According to the "Environmental Preservation for the New Construction of the Seto Tunnel on the Central Shinkansen Line," which presented the construction plan [...], the excavation of the Seto emergency exit was scheduled to start in March [...], but the work was delayed by one year and three months to June [...] due to difficulties caused by the appearance of huge rocks in the maintenance yard. It was actually delayed by one year and three months [...]. In addition, the start of excavation for the Sakashima emergency exit was delayed by almost four years.


Translated from Japanese Media. Source: http://www.zaiten.co.jp/article/2021/12/post-335.html Accessed: 2021-12-01
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Cause of the Maglev Tunnel Cave-In

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JR Tokai explains cause and measures to prevent recurrence to prefectural government 


In November 2021, one worker was slightly injured when rocks and other materials collapsed during construction of a working tunnel in the Ina mountainous area of Nagano's Toyooka village on the Central Linear Shinkansen line.

According to JR Tokai, the cause of the accident is presumed to be insufficient removal of floating stones after blasting, unevenness in the sprayed concrete and insufficient thickness in some areas, and insufficient monitoring by the workers. As a result of the accident, the excavation work for the working tunnel in the Ina Mountain Tunnel has been suspended.

In order to prevent a recurrence of the incident, the prefectural government is planning to increase the number of experienced workers to check the workmanship and increase the number of workers to monitor the work.

JR Tokai says, "We would like to resume work as soon as we are ready, after reporting the cause of the accident and measures to prevent recurrence to the municipalities concerned.


Info based on translation of Japanese Media reports. https://www.fnn.jp/articles/-/298175 Accessed 2022-01-13
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Inadequate ground survey for linear maglev system, no lessons learned from Gaikan Expressway accident?

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Inadequate ground survey for linear maglev system, no lessons learned from Gaikan Expressway accident?
The government has decided to respond to the questionnaire submitted by Mr. Taku Yamazoe, a member of the House of Councillors of the Japan Communist Party, regarding the construction of the Linear Central Shinkansen.

According to the report, only 12 of the preliminary boring surveys were conducted along the route of the Tokyo metropolitan area and the deep underground sections in Kanagawa and Aichi prefectures for the construction of the Central Linear Railway, which is being promoted by JR Tokai.
It has become clear that only five of the borings have reached the bottom of the tunnel.

[...]

In the case of the Tokyo Outer Ring Road, where a sinking accident occurred and it was pointed out that the prior boring survey to ascertain the ground was inadequate, an average of one boring survey was conducted every 700 meters to the bottom of the tunnel. One boring survey is conducted every 700 meters on average. The written answer states that there is "no plan" for additional boring surveys, highlighting the fact that the lessons learned from the outer ring road accident are not being utilized.

JR Tokai started "survey drilling" from Shinagawa Ward in October last year. Residents have criticized the project, saying that it is nothing more than initial digging as part of shield construction. In response, Tokai admitted that "externally, it is equivalent to 'initial excavation'. JR Tokai's stance of forcing the construction without a sincere explanation is extremely problematic.

In addition, the letter of reply stated that 9,900 houses in the three prefectures were surveyed in advance. It did not respond to Mr. Yamazoe's suggestion that the scope of the survey was too narrow based on the situation of the Gaikan accident.


(From Shinbun Akahata, January 14, 2022)

Trabslated from https://www.jcp-tokyo.net/2022/0115/65447 Accessed: 2022-01-15
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JR Tokai: Nagano Maglev construction to resume

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Nagano Maglev construction to resume next week = Report to prefectural government on measures to prevent recurrence -


 JR Tokai said on Jan. 18 that it will resume construction of the Ina Mountain Tunnel in Toyooka Village, Nagano Prefecture.

One worker was slightly injured in a landslide at the construction site of the Ina Mountain Tunnel in Toyooka Village, Nagano Prefecture, last November. After reporting the incident to the municipalities concerned, the construction work at the site will be resumed by next week.

 According to the measures to prevent recurrence, in addition to the overall safety inspection, which was conducted once a month before the accident, partial safety checks will be conducted at least once a week, covering part of the work process. The prefectural government has asked JR Tokai to "communicate sufficiently with local residents and municipalities along the railway line. 

Info based on translation of a Japanese Media report: https://trafficnews.jp/post/114605 Zugriff 2022-01-18
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JR Tokai resumes Maglev construction

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JR Tokai resumes construction of the Linear Central Shinkansen, which was temporarily halted due to the accident.

Central Japan Railway Company (JR Tokai) has resumed the construction of the Linear Central Shinkansen, which had been temporarily halted due to an accident that occurred last November at a tunnel construction site in Toyooka Village, after taking measures to prevent a recurrence.

Last November, an accident occurred at the construction site of a tunnel in Toyooka village of the Linear Central Shinkansen line, in which one worker was slightly injured when earth and sand collapsed. One worker was slightly injured.

In response to the accident, on the 18th of this month, JR Tokai announced that it would strengthen the on-site inspection conducted by JR Tokai personnel as a measure to prevent the reoccurrence of the accident, and that it would also increase the number of construction companies involved in the construction of the Central Linear Railway. In response to the accident, JR Tokai reported to the prefectural government on the 18th of this month that, as a measure to prevent a recurrence of the accident, it would strengthen on-site inspections conducted by JR Tokai personnel and share know-how on accident prevention among construction companies involved in the construction of the Central Linear Railway.

The construction site reopened on the morning of the 24th, and construction vehicles entered the tunnel one after another from this morning.
According to JR Tokai, blasting operations will be resumed as early as this week after the earth and sand are removed from the site.
Regarding the resumption of construction work in Toyooka Village, JR Tokai commented, "Upon resumption of construction work, we will once again ensure that the construction company takes all necessary measures to prevent recurrence, and will proceed with construction work in a safety-first manner by firmly implementing measures to prevent recurrence.

Yoshitaka Shimohira, mayor of Toyooka Village, said, "I am glad that the construction work has finally resumed. I hope that the village will continue to share information with the prefecture and the village, and take safety measures to proceed with the construction.

Info based on an NHK report: https://www3.nhk.or.jp/lnews/nagano/202 ... 21343.html Accessed: 2022-01-24
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