Workers this week lowered the initial cages into an excavation pit near the Cong Hoa–Truong Chinh intersection to build the 1.2-meter-thick diaphragm wall. This milestone marks the project's official transition from the preparation stage to full-scale construction.
According to the HCMC Management Authority for Urban Railways (MAUR), the diaphragm wall at Pham Van Bach Station will extend approximately 534 m. The construction of the 41-meter-deep wall is expected to take six months.
Engineers and workers lower a steel reinforcement cage during the construction of the diaphragm wall for the underground Pham Van Bach Station of HCMC's Ben Thanh - Tham Luong metro line, July 2, 2026. Photo by VnExpress/Ha Giang
During the building phase, the wall will retain soil and groundwater to ensure the excavation pit's stability. Once the station is completed, it will serve as a permanent load-bearing component of the overall structure.
MAUR emphasized that this phase requires a high level of technical precision, strict material quality control, and rigorous safety measures.
