Abstract:

In the course of tunnel invert construction, the construction quality is hard to be guaranteed due to the simple traditional equipment and backward technology; the passing pedestrians, vehicles and mechanical equipment are impassible during the invert processes of excavating and slag discharging; and the existing invert construction equipment for the existing passenger dedicated line tunnels are with low mechanization and integration degree. In order to solve these problems, taking the Guizhou Section CKGZTJ3 of Donglianganpo tunnel in ShanghaiKunmming Passengerdedicated line as example, the invert trestle, formwork system and walking mechanism are studied. The fully automatic hydraulic trestle invert mobile formwork machine are developed with the integration of trestle, invert formwork, central ditch formwork, walking mechanism, hydraulic and electrohydraulic devices and other structural parts. In the construction process, the invert construction area should be optimized firstly. The trestle walking, invert and central ditch formwork installation and location can be controlled by adopting fully automatic hydraulic and electrohydraulic system functions. During invert construction, the passing pedestrian, vehicles, mechanical equipment and palm surface construction have no interference with one another. The fully automatic hydraulic trestle type invert mobile formwork frame machine effectively reduces the input of operators and auxiliary materials, improves the work efficiency, controls the safe step distance, and ensures the lining and filling of invert and the quality of the central ditch.

Key words: tunnel, fully automatic hydraulic trestle, inverted mobile formwork, integrated machine, formwork, invert construction