The Ho Chi Minh City Urban Railway (Metro) Management Committee completed the second excavation of an underground tunnel connecting Citizen Theater Station on June 29 at Ba Son Station on Metro Line 1 (Bến Thành ~ Suối Tiên). Underground tunnel length is 781m.
Tunnel construction is part of Package 1B (Citizen Theater - Bason underground section) of Metro Route 1 by Shimizu Construction Co., Ltd. (Chuo-ku, Tokyo) and Maeda Construction Industry Co., Ltd. (Chiyoda-ku, Tokyo).
Tunnel boring machines (TBM), which is 300t in weight, are constructed at 12m underground, which is located in the upper part of the first tunnel located at the west side of the tunnel No. 2. Nguyen Sieu Street and Hai Ba Trung street is passing by.
Tunnel No. 1 in the east was commissioned at the construction site of the Basse station in May 2017, and excavation work was completed at the Citizen Theater station at the end of October, five months later.
After completion of tunnel excavation, concrete pavement, rail laying, signaling system and drainage system will be installed and all work will be completed in 2019.