Authorities raided the production site of tunnel lining panels for the Nhon urban railway project.

The tunnel lining is a universal type consisting of 6 interconnected sections with an inner diameter of 5.7m, an outer diameter of 6.3m, a width of 1.5m, and a lining thickness of 0.3m. Each tunnel segment is 1.5m long. In the photo, workers prepare the formwork, install the reinforcement and accessories, and then pour concrete into the formwork. Afterwards, the tunnel lining sections will be covered in sealed chambers for steam curing until the concrete reaches the specified compressive strength.

Source: https://www.baogiaothong.vn/dot-nhap-noi-san-xuat-tam-vo-lam-ham-duong-sat-do-thi-nhon-ga-ha-noi-192240720174230799.htm