Close-up of dismantling and lifting the "super drill" of Nhon - Hanoi station metro tunnel to the ground
Tô Thế |
Hanoi - After completing tunnel excavation, TBM machine No. 2 of the Nhon - Hanoi station metro line was dismantled under station S12 with high technical requirements.
Information from the Hanoi Urban Railway Management Board (MRB) said that the dismantling and transportation of components of TBM tunnel excavator No. 2 under package CP03 (Tunnel and underground stations) of the Nhon - Hanoi station urban railway line project (Nhon - Hanoi Metro) is being implemented at underground station S12 - Hanoi station. Photo: MRBTunnel excavator TBM No. 2 named "Audacious" has completed the tunnel drilling task. This is an important milestone for the construction of the underground section of the project. Photo: MRBAccording to MRB, on the night of May 29 and early morning of May 30, engineers, experts and construction forces dismantled the first components of TBM2 at a depth of tens of meters underground. Photo: MRBThe entire work is carried out according to strict technical procedures with the participation of construction contractors, supervision consulting units and technical and safety departments to ensure quality and labor safety requirements. Photo: MRBCompared to dismantling machine TBM No. 1 before, the process of handling TBM2 is considered more complicated. The reason is that the body is not located right below the opening of station S12. Therefore, engineers must dismantle each part, and at the same time carry out the horizontal movement of the main body weighing about 500 tons at the bottom of the station before bringing it to a suitable location to be lifted to the ground. Photo: MRBSome parts of the machine weighing nearly 100 tons are lifted and lowered according to strict control procedures, under the continuous supervision of experts, technical engineers and safety forces. Photo: MRBIn addition to technical factors, the construction site is also located in the central area of Hanoi, where there is a high traffic density and many existing structures around. To minimize the impact on urban traffic, crane installation and lowering of components are mainly carried out at night by heavy cranes with a load capacity of about 500 tons. Photo: MRBMRB said that before dismantling each large component, the specialized contractor must develop a detailed construction plan. These measures are thoroughly appraised by the main contractor, supervision consultant and technical and safety departments of the project before approving implementation. Photo: MRBAfter being brought to the ground, the components of the TBM machine will be transported by specialized vehicles to the gathering area in the suburbs for maintenance, inspection and technical evaluation. The transportation process is carried out according to a route licensed by functional agencies, mainly at night and with a guide vehicle to ensure traffic safety as well as limit impact on urban infrastructure. Photo: MRBAccording to the plan, the complete dismantling of one TBM is expected to last about 2.5 months. Photo: MRB
MRB also informed that currently, the construction volume of the underground section of the Nhon - Hanoi Metro line has reached about 79.3%.
In the coming time, MRB will continue to coordinate with relevant units to urge contractors to ensure progress, project quality, labor safety and environmental sanitation, while minimizing the impact on people's lives in the project area.
Hanoi - TBM No. 2 excavator for the Nhon - Hanoi Station Metro tunnel has arrived at Van Mieu station, marking another important milestone in the underground construction of the project.
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Hanoi - TBM No. 2 excavator for the Nhon - Hanoi Station Metro tunnel has arrived at Van Mieu station, marking another important milestone in the underground construction of the project.