On June 29th, the HCM City Railway Authority and the contractor held a ceremony to welcome TBM tunneling machine (300t robot) tunnel west of metro line 1 (Ben Thanh – Suoi Tien).
The tunnel is 781m long, completed after 5 months of construction
Similar to the East tunnel earlier completed in October 2018, the second tunnel was 781m long, linking Ba Son station to City Theater station. However, because the second tunnel is located more than 12 meters below the ground, it is deeper than the first tunnel, which affects the larger ground structures.
Representatives of the urban railway management said: “The construction of the second tunnel is more difficult, so the excavation must be very careful, the contractor has to monitor and adjust the appropriate operating parameters of the machine. The above is safe. “
After completion of the two tunnel boring, the contractor unit will continue to pour concrete for the railroad tunnel for the west, installing railways, signaling systems, drainage for two tunnels.
On October 31, 1977, the first metro tunnel (East tunnel) of the metro line 1 arrived one month early. This tunnel goes from Ba Son Station through Ton Duc Thang Street, Ngo Van Nam Street, 3A Ton Duc Thang, Nguyen Sieu, Hai Ba Trung Street, between the Opera House and Caravelle Hotel, across Dong Khoi Street to the Opera House.
Ben Thanh – Suoi Tien metro project with total capital of $2.49 billion (more than VND47,000 billion) was started in August 2012. Long nearly 20 km, the route passes through districts 1, 2, 9, Binh Thanh, Thu Duc (HCMC) and Di An (Binh Duong).
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Of which 2.6 km underground (3 stations) and over 17 km high (11 stations). The project is scheduled to be put into operation in 2020. Because the central government slow to allocate capital, the city has 3 times to advance capital to contractors to ensure progress.
The TBM is a horizontal drilling machine, consisting of a long steel pipe of various sizes and diameters, which are sufficiently large to accommodate machine or operator equipment. The end of the tube is a dagger with a cutter, the motor rotates to cut the ground.
Where the drill goes, the lining (which is the reinforced concrete reinforced concrete) will be grafted there to avoid landslide above.
TBM robot 70 m long, weighing 300 tons, was produced in Japan and worth about $ 4 million, was shipped back to Vietnam earlier this year.
According to Mr. Akito Takahashi – Deputy Representative Office of Japan International Cooperation Agency (JICA) in Vietnam, this is the first time that the advanced shielding technology of Japan using TBM underground drilling machines has been applied in the construction of urban works in Vietnam with little effect on traffic and people’s life.
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