Full round travelling formwork for secondary lining of tunnels

Abstract

A formwork system is specifically adapted to be full-round tunnel lining formwork systems. The system includes at least one formwork element having a surface shaped to conform a part of a tunnel lining, and hydraulic cylinder coupled with the formwork element to exert pressure on it towards a primary lining, and at least one load sensor for measuring load exerted by the hydraulic cylinder. The system further includes a system controller that operates the hydraulic cylinder based on measurements of the pressure sensor, and maintains the pressure exerted by the formwork element on a primary lining during concrete forging, equal or below a predefined pressure to avoid damaging an external tunnel lining or structure. The formwork system speeds up execution work and avoids budget overcost caused by damages and repairs.

Dependencies are inferred from the claim text.