Bubbles Possibly Linked to Maglev Construction: Communist Party Delegation Demands Explanation
Bubbles Possibly Linked to Linear Construction Tokyo's Meguro River: Party Delegation Demands Explanation
Members of the Japanese Communist Party questioned the Ministry of Land, Infrastructure, Transport, and Tourism (MLIT) about the connection between bubbles in Tokyo's Meguro River and the Linear Shinkansen construction by JR Tokai. The MLIT stated they are investigating in coordination with JR Tokai and Shinagawa Ward. Taku Yamazoe of the Japanese Communist Party urged a national investigation into the bubbles' composition.
Local residents expressed concern, criticizing the MLIT for not addressing the issue sooner and warning of potential dangers. They referenced a 2020 incident during the Tokyo Outer Ring Road construction, where bubbles were linked to subsidence. Kazuhiko Miki from the Denenchofu Residents' Association highlighted the continuous emergence of bubbles, warning it could signal a major accident like the one on the Gaikan Expressway.
The meeting included Japanese Communist Party members Akira Koike, Yoshiko Kira, and Tamio Shiraishi.
Source: Translated news from https://www.jcp.or.jp/akahata/aik24/202 ... _02_0.html Accessed 2024-09-31
[JP] Bubbles Linked to Maglev Construction: Communist Party Delegation Demands Explanation
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[JP] Bubbles Linked to Maglev Construction: Communist Party Delegation Demands Explanation
During the tunneling work for the Chuo Shinkansen in Tokyo's Shinagawa and Machida areas, concerns have emerged about the safety of the ongoing construction. In August, bubbles with an oxygen concentration of just 4% were detected in the Meguro River in Shinagawa. This phenomenon is suspected to be linked to the tunneling activities, although officials from the Ministry of Land, Infrastructure, Transport and Tourism (MLIT) stated that no definitive causal relationship has been established. Despite the discovery of these bubbles, construction using shield machines continued without pause.
The Japanese Communist Party (JCP) took action on December 2 by holding a hearing with MLIT officials at the National Diet. The hearing was attended by JCP members, including Taku Yamazoe, a policy committee chair and member of the House of Councillors; Tamio Shiraishi, a Tokyo Metropolitan Assembly member; and Tomoyuki Tanigawa, deputy chair of the JCP Policy Committee. Representatives from Shinagawa and Machida local councils and residents affected by the construction also participated.
During the hearing, concerns were raised about the serious health risks posed by the low-oxygen environment. Tamio Shiraishi emphasized that an oxygen concentration of 4% is considered lethal if inhaled, comparable to conditions in confined underground spaces. He urged MLIT to fully acknowledge the gravity of this issue as a matter of life and death. JCP member Taku Yamazoe criticized the continuation of construction despite the detection of the bubbles, questioning why the work had not been halted for a thorough investigation.
In Machida, a separate issue surfaced as water and bubbles erupted in the backyard of a private residence, further intensifying concerns about the environmental and safety impacts of the project. However, MLIT deferred responsibility, stating that JR Central, the project's primary contractor, would be responsible for conducting investigations and addressing the problems. This hands-off approach drew criticism from both lawmakers and residents.
Local residents’ groups, such as the Denenchofu Association for Protecting the Living Environment from the Linear Project, have expressed deep concerns over the project’s safety and environmental impacts. Miki Kazuhiko, the association's representative, demanded that tunneling operations not resume until robust measures to prevent similar incidents are implemented and local communities are assured of their safety.
The controversy highlights the broader tensions surrounding the Chuo Shinkansen project, as residents and lawmakers call for greater accountability, transparency, and prioritization of public safety over project timelines.
Info based on Japanese Medai News: https://www.jcp.or.jp/akahata/aik24/202 ... _01_0.html (Communist Party of Japan). Accessed 2024-12-03
The Japanese Communist Party (JCP) took action on December 2 by holding a hearing with MLIT officials at the National Diet. The hearing was attended by JCP members, including Taku Yamazoe, a policy committee chair and member of the House of Councillors; Tamio Shiraishi, a Tokyo Metropolitan Assembly member; and Tomoyuki Tanigawa, deputy chair of the JCP Policy Committee. Representatives from Shinagawa and Machida local councils and residents affected by the construction also participated.
During the hearing, concerns were raised about the serious health risks posed by the low-oxygen environment. Tamio Shiraishi emphasized that an oxygen concentration of 4% is considered lethal if inhaled, comparable to conditions in confined underground spaces. He urged MLIT to fully acknowledge the gravity of this issue as a matter of life and death. JCP member Taku Yamazoe criticized the continuation of construction despite the detection of the bubbles, questioning why the work had not been halted for a thorough investigation.
In Machida, a separate issue surfaced as water and bubbles erupted in the backyard of a private residence, further intensifying concerns about the environmental and safety impacts of the project. However, MLIT deferred responsibility, stating that JR Central, the project's primary contractor, would be responsible for conducting investigations and addressing the problems. This hands-off approach drew criticism from both lawmakers and residents.
Local residents’ groups, such as the Denenchofu Association for Protecting the Living Environment from the Linear Project, have expressed deep concerns over the project’s safety and environmental impacts. Miki Kazuhiko, the association's representative, demanded that tunneling operations not resume until robust measures to prevent similar incidents are implemented and local communities are assured of their safety.
The controversy highlights the broader tensions surrounding the Chuo Shinkansen project, as residents and lawmakers call for greater accountability, transparency, and prioritization of public safety over project timelines.
Info based on Japanese Medai News: https://www.jcp.or.jp/akahata/aik24/202 ... _01_0.html (Communist Party of Japan). Accessed 2024-12-03
Re: [JP] Bubbles Linked to Maglev Construction: Communist Party Delegation Demands Explanation
A Communist party in Japan amazing, is there a democratic party in China?
We had bubbles when we drove under Sydney harbour and it was alright they just are using any excuse to stop it.
We had bubbles when we drove under Sydney harbour and it was alright they just are using any excuse to stop it.
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[JP] Concerns Over Oxygen Levels Near Linear Chuo Shinkansen Construction Site
Concerns Over Oxygen Levels Near Linear Chuo Shinkansen Construction Site
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Source: https://www.jcp-tokyo.net/2024/1203/99066 Accessed 2024-12-05.
Source: https://www.jcp-tokyo.net/2024/1203/99066 Accessed 2024-12-05
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On December 2, representatives of the Japanese Communist Party (JCP) conducted a hearing with officials from the Ministry of Land, Infrastructure, Transport and Tourism (MLIT) regarding safety issues linked to the Linear Chuo Shinkansen's tunneling project in Tokyo's Shinagawa Ward and Machida City. The meeting, held at Japan's National Diet, was attended by JCP members, local assembly members, and residents addressing environmental concerns associated with the project.
One key issue discussed involved bubbles with dangerously low oxygen concentrations (4%) observed in the Meguro River near Shinagawa Ward. MLIT officials stated that no definitive link between the construction work and this phenomenon had been established. Despite these findings, tunneling activities using a shield machine have continued since August, even after the bubbles were first detected during investigative drilling.
JCP representative Taku Yamazoe criticized the decision not to halt construction upon detecting the bubbles, emphasizing the potential dangers of such low oxygen levels, which could be fatal in enclosed spaces. Similarly, Tami Shiraishi, a Tokyo Metropolitan Assembly member, stressed that the MLIT must recognize the risk to human lives posed by this issue: “Air with an oxygen concentration of 4% is a level that would cause instant death if inhaled in an underground room. The MLIT should be aware that this is a life-threatening problem".
Another concern raised involved reports of water and bubbles surfacing in a residential garden in Machida City. The MLIT maintained that JR Central, the project's operator, is responsible for investigating the situation. Critics argued that delegating the investigation to private parties undermines accountability and resident safety.
Kazuhiko Miki, head of a local residents’ group advocating for safety measures, called for robust prevention strategies and demanded that the tunneling process not resume until residents are assured of its safety.
The hearing highlighted mounting public and political pressure on authorities to address environmental and safety risks linked to the Linear Chuo Shinkansen project.
Summary of https://www.jcp-tokyo.net/2024/1203/99066 Accessed 2024-12-05
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(from left) Shiraishi, Yamazoe, Tanigawa, and others interviewing MLIT officials about events around the Linear construction site in the National Diet on March 2.リニア工事現場周辺の事象について国土交通省の担当者に聞く（左から）白石、山添、谷川の各氏ら＝２日、国会内
Source: https://www.jcp-tokyo.net/2024/1203/99066 Accessed 2024-12-05
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On December 2, representatives of the Japanese Communist Party (JCP) conducted a hearing with officials from the Ministry of Land, Infrastructure, Transport and Tourism (MLIT) regarding safety issues linked to the Linear Chuo Shinkansen's tunneling project in Tokyo's Shinagawa Ward and Machida City. The meeting, held at Japan's National Diet, was attended by JCP members, local assembly members, and residents addressing environmental concerns associated with the project.
One key issue discussed involved bubbles with dangerously low oxygen concentrations (4%) observed in the Meguro River near Shinagawa Ward. MLIT officials stated that no definitive link between the construction work and this phenomenon had been established. Despite these findings, tunneling activities using a shield machine have continued since August, even after the bubbles were first detected during investigative drilling.
JCP representative Taku Yamazoe criticized the decision not to halt construction upon detecting the bubbles, emphasizing the potential dangers of such low oxygen levels, which could be fatal in enclosed spaces. Similarly, Tami Shiraishi, a Tokyo Metropolitan Assembly member, stressed that the MLIT must recognize the risk to human lives posed by this issue: “Air with an oxygen concentration of 4% is a level that would cause instant death if inhaled in an underground room. The MLIT should be aware that this is a life-threatening problem".
Another concern raised involved reports of water and bubbles surfacing in a residential garden in Machida City. The MLIT maintained that JR Central, the project's operator, is responsible for investigating the situation. Critics argued that delegating the investigation to private parties undermines accountability and resident safety.
Kazuhiko Miki, head of a local residents’ group advocating for safety measures, called for robust prevention strategies and demanded that the tunneling process not resume until residents are assured of its safety.
The hearing highlighted mounting public and political pressure on authorities to address environmental and safety risks linked to the Linear Chuo Shinkansen project.
Summary of https://www.jcp-tokyo.net/2024/1203/99066 Accessed 2024-12-05
Re: [JP] Bubbles Linked to Maglev Construction: Communist Party Delegation Demands Explanation
Perhaps China wants to can it because it is faster and cheaper than their EMS maglev with only 1 cm clearance.
In Australia we often have methane bubbles in our creeks but it is no big problem especially if the tunnel is well ventilated.
In Australia we often have methane bubbles in our creeks but it is no big problem especially if the tunnel is well ventilated.
[JP] Land subsidence near linear construction work expands up to 6.9 cm
Land subsidence near linear construction work expands up to 6.9 cm, measured by JR this month in Otsu-cho, Mizunami City, where water level has dropped.
JR Tokai has been measuring the subsidence of the water level in Ootte Town, Mizunami City, Gifu Prefecture, where the water level has been dropping due to the construction of a tunnel for the Linear Central Shinkansen Line, and found that the subsidence near the tunnel construction site has increased to 6.9 cm at the maximum point.
On August 26, JR Tokai measured land subsidence of 0.6 to 2.4 cm at 12 locations in the Oyu Basin, where the village is located. According to JR, the maximum point was 4.9 cm on October 21 and 5.9 cm on November 19. The largest point sank 4.5 centimeters in the three and a half months since August 26, when the subsidence was first confirmed.
Info based on translated Japanese Media News: https://www.chunichi.co.jp/article/998860, Accessed 2024-12-14
Re: [JP] Bubbles Linked to Maglev Construction: Communist Party Delegation Demands Explanation
Maybe they would be better off using a TBM
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[JP] Bubbles: JR Tokai Says No Clear Link to Excavation
Bubbles Found in Meguro River Near Linear Tunnel Construction, But JR Tokai Says No Clear Link to Excavation
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Source: Screenshot from https://www.tokyo-np.co.jp/article_phot ... id=1770680 Accessed 2024-12-19
On December 17, 2024, during a public meeting, JR Tokai revealed that bubbles with oxygen levels about one-fifth of normal were discovered in the Meguro River, near the site of a "test excavation" for the Linear Chuo Shinkansen. The excavation, which began on June 29, uses a shield machine to dig 40 meters below ground from the Kita-Shinagawa emergency exit in Tokyo. JR Tokai clarified that no clear connection between the excavation and the bubbles could be found. The discovery raised concerns among nearby residents, with some expressing ongoing anxiety.
According to JR Tokai, the excavation process involved the release of bubble agents to make the soil easier to dig, continuing until November. The bubbles were first observed on August 2, even when no bubble agents were used, and they were still appearing in December. JR Tokai insisted that there was no correlation between the bubbles and the ongoing construction work.
Info based on https://www.tokyo-np.co.jp/article_phot ... id=1770680 Accessed 2024-12-19
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Source: Screenshot from https://www.tokyo-np.co.jp/article_phot ... id=1770680 Accessed 2024-12-19
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- 2024-12-19_Tokyo_Shimbun_1
- Screenshot 2024-12-19 at 12-31-14 リニアトンネル工事付近の目黒川で気泡が発生[...].png (890.46 KiB) Viewed 2947 times
On December 17, 2024, during a public meeting, JR Tokai revealed that bubbles with oxygen levels about one-fifth of normal were discovered in the Meguro River, near the site of a "test excavation" for the Linear Chuo Shinkansen. The excavation, which began on June 29, uses a shield machine to dig 40 meters below ground from the Kita-Shinagawa emergency exit in Tokyo. JR Tokai clarified that no clear connection between the excavation and the bubbles could be found. The discovery raised concerns among nearby residents, with some expressing ongoing anxiety.
According to JR Tokai, the excavation process involved the release of bubble agents to make the soil easier to dig, continuing until November. The bubbles were first observed on August 2, even when no bubble agents were used, and they were still appearing in December. JR Tokai insisted that there was no correlation between the bubbles and the ongoing construction work.
Info based on https://www.tokyo-np.co.jp/article_phot ... id=1770680 Accessed 2024-12-19
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- 2024-12-19_Tokyo_Shimbun_1
- Screenshot 2024-12-19 at 12-31-38 リニアトンネル工事付近の目黒川で気泡が発生[...].png (1.14 MiB) Viewed 2947 times
Translation: Construction site near the Kitashinagawa emergency exit (center) of the Linear Shinkansen Line. On the left is the Meguro River = November 2023; photo by Tasuku Kido.リニア中央新幹線の北品川非常口（中央）付近の工事現場。左が目黒川＝2023年11月、木戸佑撮影
Re: [JP] Bubbles Linked to Maglev Construction: Communist Party Delegation Demands Explanation
Apolagies I thought it was drill and blast there.
Just ignore the communist party miss maglev.
Just ignore the communist party miss maglev.
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Re: [JP] Bubbles Linked to Maglev Construction: Communist Party Delegation Demands Explanation
Water and bubbles” in a private home's garden...JR Tokai ‘caused by Linear Line excavation at great depth’ What is the impact on people? What are the measures to be taken?
On December 19, JR Tokai reported an issue in Machida City, Tokyo, where water and air bubbles surfaced in a private garden near the tunneling route for the Linear Shinkansen Line. The tunneling, at a depth of 40 meters or more, caused air bubbles released from the shield machine (excavator) to push up underground water and air. This incident marks the second case of such bubbling effects, following a previous sinking accident in Chofu. The bubbles appeared on October 22 in a garden about 40 meters from the excavation site at the Onoji construction section of the First Metropolitan Tunnel. JR Tokai confirmed that the excavation, which occurred at a depth of 45 meters, led to these surface effects, similar to those seen during the Tokyo Outer Ring Road subsidence in Chofu.
Info based on https://www.tokyo-np.co.jp/article/374713 Accessed: December 21, 2024
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Onoji emergency exit of the Linear Central Shinkansen in Machida City, Tokyo (photo by Kojiro Hirano)
Photo from https://www.tokyo-np.co.jp/article/374713 Accessed: December 21, 2024
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[JP] Bubbles Linked to Maglev Construction
JR Central has released investigation results confirming that water and bubbles that emerged in a residential garden in Machida City, Tokyo, were caused by the Linear Chuo Shinkansen construction work. The incident occurred in October near a construction site where underground excavation for the new high-speed rail line was taking place.
The company discovered that air from the foaming agent used to facilitate soil excavation had surfaced along with groundwater. This finding came to light during a "survey excavation" process designed to assess the construction's impact on the ground surface.
JR Central suspended construction work to investigate the cause. They have confirmed that the water and bubbles pose no health risks to humans. The railway company plans to resume the "survey excavation" after January of the following year and will soon begin explaining the situation to local residents.
This incident highlights the challenges faced by the Linear Chuo Shinkansen project, which aims to connect Tokyo, Nagoya, and eventually Osaka with a high-speed maglev train system. The project has encountered various obstacles, including construction delays and environmental concerns in different prefectures.
Info based on: https://www.asahi.co.jp/webnews/pages/a ... 92785.html Accessed 2024-12-22
The company discovered that air from the foaming agent used to facilitate soil excavation had surfaced along with groundwater. This finding came to light during a "survey excavation" process designed to assess the construction's impact on the ground surface.
JR Central suspended construction work to investigate the cause. They have confirmed that the water and bubbles pose no health risks to humans. The railway company plans to resume the "survey excavation" after January of the following year and will soon begin explaining the situation to local residents.
This incident highlights the challenges faced by the Linear Chuo Shinkansen project, which aims to connect Tokyo, Nagoya, and eventually Osaka with a high-speed maglev train system. The project has encountered various obstacles, including construction delays and environmental concerns in different prefectures.
Info based on: https://www.asahi.co.jp/webnews/pages/a ... 92785.html Accessed 2024-12-22
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[JP] JR Central's Maglev Construction: Bubbles in Yard Raise Concerns
JR Central's Maglev Construction: Bubbles in Yard Raise Concerns
In a recent development surrounding the Chuo Shinkansen maglev train project, JR Central has resumed limited excavation work near a residential area in Machida City, Tokyo, despite ongoing concerns from local residents. This situation has sparked controversy and raised questions about the company's communication and safety practices.
Incident Background
On October 22, 2024, water and bubbles were observed emerging from the ground in a residential yard in Machida City. This location is close to the tunnel excavation route for the Chuo Shinkansen, which is being constructed at depths exceeding 40 meters. JR Central immediately halted excavation work upon discovering this issue.
JR Central's Response
After investigating the incident, JR Central acknowledged that the water and bubble emergence was related to their construction work. The company cited unusual underground conditions that led to slightly higher excavation pressure, causing the phenomenon.
To address the issue, JR Central announced plans to:
1. Lower the pressure settings for excavation.
2. Conduct a "preservation excavation" of 5 meters to stabilize the tunnel boring machine.
3. Resume investigative excavation in January 2025.
Resident Concerns and Opposition
A male resident near the affected area has expressed significant anxiety about the situation. He claims that he has not consented to the resumption of excavation work, stating, "If the same thing happens again, it would be troubling. It all comes down to one word: anxiety."
The resident, supported by a local citizens' group called "The Machida Association for Considering the Linear Chuo Shinkansen," submitted a notification to the on-site construction office stating their lack of consent for the excavation.
Communication Breakdown
JR Central maintains that they explained the necessity of the work to the resident, believing they had obtained approval. However, the resident group has presented eight conditions that need to be met before granting consent, including:
1. Limiting the preservation excavation to the minimum necessary range.
2. Informing surrounding residents about the possibility of groundwater seepage during the excavation.
Legal and Ethical Considerations
While the Deep Underground Utilization Law does not require landowner consent for such projects, this situation raises ethical questions about JR Central's approach to community relations and safety concerns.
Broader Implications for the Chuo Shinkansen Project
This incident is part of a larger pattern of delays and controversies surrounding the Chuo Shinkansen project. Earlier announcements indicated that the planned 2027 launch date for the Tokyo-Nagoya section might be postponed significantly due to ongoing environmental opposition.
The project aims to connect Tokyo and Osaka with trains capable of speeds up to 500 kilometers per hour and has faced numerous challenges related to environmental concerns and extensive tunneling requirements.
As JR Central continues to navigate these obstacles, the incident in Machida City underscores the delicate balance between technological progress and community concerns. The company's handling of this situation may have significant implications for public trust and the project's future progress.
Info based on: https://news.goo.ne.jp/article/tokyo/re ... 76109.html Accessed 2024-12-27
In a recent development surrounding the Chuo Shinkansen maglev train project, JR Central has resumed limited excavation work near a residential area in Machida City, Tokyo, despite ongoing concerns from local residents. This situation has sparked controversy and raised questions about the company's communication and safety practices.
Incident Background
On October 22, 2024, water and bubbles were observed emerging from the ground in a residential yard in Machida City. This location is close to the tunnel excavation route for the Chuo Shinkansen, which is being constructed at depths exceeding 40 meters. JR Central immediately halted excavation work upon discovering this issue.
JR Central's Response
After investigating the incident, JR Central acknowledged that the water and bubble emergence was related to their construction work. The company cited unusual underground conditions that led to slightly higher excavation pressure, causing the phenomenon.
To address the issue, JR Central announced plans to:
1. Lower the pressure settings for excavation.
2. Conduct a "preservation excavation" of 5 meters to stabilize the tunnel boring machine.
3. Resume investigative excavation in January 2025.
Resident Concerns and Opposition
A male resident near the affected area has expressed significant anxiety about the situation. He claims that he has not consented to the resumption of excavation work, stating, "If the same thing happens again, it would be troubling. It all comes down to one word: anxiety."
The resident, supported by a local citizens' group called "The Machida Association for Considering the Linear Chuo Shinkansen," submitted a notification to the on-site construction office stating their lack of consent for the excavation.
Communication Breakdown
JR Central maintains that they explained the necessity of the work to the resident, believing they had obtained approval. However, the resident group has presented eight conditions that need to be met before granting consent, including:
1. Limiting the preservation excavation to the minimum necessary range.
2. Informing surrounding residents about the possibility of groundwater seepage during the excavation.
Legal and Ethical Considerations
While the Deep Underground Utilization Law does not require landowner consent for such projects, this situation raises ethical questions about JR Central's approach to community relations and safety concerns.
Broader Implications for the Chuo Shinkansen Project
This incident is part of a larger pattern of delays and controversies surrounding the Chuo Shinkansen project. Earlier announcements indicated that the planned 2027 launch date for the Tokyo-Nagoya section might be postponed significantly due to ongoing environmental opposition.
The project aims to connect Tokyo and Osaka with trains capable of speeds up to 500 kilometers per hour and has faced numerous challenges related to environmental concerns and extensive tunneling requirements.
As JR Central continues to navigate these obstacles, the incident in Machida City underscores the delicate balance between technological progress and community concerns. The company's handling of this situation may have significant implications for public trust and the project's future progress.
Info based on: https://news.goo.ne.jp/article/tokyo/re ... 76109.html Accessed 2024-12-27
Re: [JP] Bubbles Linked to Maglev Construction: Communist Party Delegation Demands Explanation
Japan wants to redeem costs for the SC maglev the same way as CLARA in Australia but as a single tunnel is more secure and cost no more it can earn $1.4b p/a with overnight container trains keeping the daytime fares to $10.
So instead of trying to claw back money with development they should develop an overnight container train while waiting for the tunnel to be completed.
So instead of trying to claw back money with development they should develop an overnight container train while waiting for the tunnel to be completed.