HS2 West Ruislip Portal

The West Ruislip Portal is a major permanent civil engineering asset facilitating the transition between the HS2 tunnels and the open railway alignment. The structure comprises a reinforced concrete portal frame and associated retaining walls. Construction includes heavily reinforced concrete bases, Walls, roof, ventilation chimneys, and earthworks support. The portal plays a critical role in tunnel interface management, railway resilience, and long-term operational safety.