|The drilling of a second tunnel at Ba Son Station on Metro Line No 1 in HCM City has been completed. —VNA/VNS Photo An Hiếu|Viet Nam News
HCM CITY —Tunnel-boring machines yesterday completed the drilling of the second tunnel of the Metro Line No.1 connecting HCM City’s Bến Thành Terminal in District 1 with Suối Tiên Terminal in District 9 after more than five months of implementation, according to the HCM City Management Authority for Urban Railways.
The tunnel, with total length of 781 metres, width of 6.79 metres and depth of more than 12 metres, runs from Ba Son Station on District 1’s Tôn Đức Thắng Street to the Municipal Theatre on Đồng Khởi Street in District 1.
According to the HCM City Management Authority for Urban Railways, because the tunnel’s depth is lower than the first one, more careful drilling was required.
Strict monitoring to adjust the machine’s operation parameters during the drilling process were necessary, the authority said.
After drilling the two tunnels, the main builder of the tunnel project, Japan’s Shimizu-Meada Joint Operation, will continue construction on the western tunnel, and also install rails, signal systems and drainage for both tunnels.
Construction on Metro Line No 1 began in August 2014. It is expected to open by 2020.
The line, which has a total length of 19.7 kilometres, has 2.6 kilometres of underground passage.
Around 54 per cent of construction on Metro Line No 1 has been completed.
Total capital after adjustment for the project has reached US$2.49 billion. — VNS