Close-up of mud from Nhon metro tunnel boring machine

TPO - Yesterday afternoon (February 20), many people in a Hanoi alley were surprised to see a lot of liquid sludge sprayed up and then flooded the entire street. Along with traffic being blocked, many houses had liquid splashed on the walls, gates, and even flowed into the house, causing unsanitary conditions.

TPO - Yesterday afternoon (February 20), many people in a Hanoi alley were surprised to see a lot of liquid sludge sprayed up and then flooded the entire street. Along with traffic being blocked, many houses had liquid splashed on the walls, gates, and even flowed into the house, causing unsanitary conditions.

The muddy liquid that sprayed up and flooded the entire street was determined to have come from the tunnel boring machine of the Nhon - Hanoi Railway Station metro line.

The incident happened at lane 7 Giang Van Minh street (Ba Dinh) at around 4:00 p.m. on February 20.

Although the local people and some construction workers used tarpaulins and bricks to cover the incident sites , the phenomenon of liquid spraying from below to the ground did not decrease, and even spread.

By 5:00 p.m., the liquid sprayed up so heavily that it submerged an entire street in lane 7 Giang Van Minh.

At this time, the construction units and contractors of the Nhon - Hanoi metro station project came to check. At this time, the liquid had risen from 20 to 30 cm. Some residents had to use plastic sheets to block the liquid from sticking and flowing into their houses.

Some sections of alley 7 Giang Van Minh street have overflowed and risen; traffic here is temporarily blocked.

As of 11pm last night, according to the reporter's records, some locations where liquid was sprayed onto the road surface at lane 7, Giang Van Minh street continued. The representative of the investor, the Hanoi Urban Railway Management Board, and the construction units were all present, standing by to handle the incident.

To prevent the liquid from spraying high and splashing, flowing into people's houses, many tarps and cardboard sheets were mobilized by construction units to cover and seal the areas where the liquid was still sprayed.

In the middle of last night, a location in lane 7 Giang Van Minh street was covered with a tarpaulin and bricks to push up. Due to concerns that the liquid would spray strongly and rise high, possibly running into houses like in the afternoon, on the night of February 20, many residents living in lane 7 Giang Van Minh street had to stay awake to be on guard. At the middle of last night, almost every house in the area where the incident occurred had its lights on both inside and outside the alley.

According to records, at around 4:00 p.m. on February 20, while the TBM1 machine was digging the underground section of the Nhon - Hanoi Railway Station urban railway project, a phenomenon of tunneling additives (a slurry) sprayed onto the ground surface occurred in the area of ​​lane 7 Giang Van Minh (Ba Dinh).

At the scene of the incident, the substance that erupted was a dark yellow liquid. After being pushed to the ground, the liquid spread throughout the neighborhood and rose about 20-30 cm. Some low-lying houses were flooded with this liquid, causing unsanitary conditions.

In a notice about the incident on the same evening, the Hanoi Urban Railway Management Board (MRB - the investor) confirmed that the liquid that overflowed to the ground was due to the tunneling additives escaping during the tunnel drilling process using a TBM (Tunnel Boring Machine) at the underground section of the project.

When the incident occurred, the Investor and Contractor inspected the scene and initially determined that the cause could be due to the existence of old wells or sewers underground that created a path for the tunneling additives to flow to the surface (these old wells and sewers are no longer in use).

News Reporter Group

Source: https://tienphong.vn/can-canh-bun-tu-may-dao-ham-metro-nhon-ga-ha-noi-phun-tran-ngo-pho-post1718841.tpo