METHOD OF TWO-LANE TUNNEL CONSTRUCTION Russian patent published in 2017 - IPC E21D9/06 

FIELD: construction.

SUBSTANCE: method of two-lane tunnel construction comprises tunneling using tunnel-boring mechanized complex, installation of a formwork for the construction of a ventilation slab, erection of a rigid tunnel base. A multi-level assembling trolley of portal construction supported by rollers is connected to the tunnel-boring mechanized complex, utility systems are erected at the planned height during tunneling and formwork for the ventilation slab construction is installed using the trolley. When erecting the rigid tunnel base, lateral concrete protrusions are constructed, a handling trolley is moved along them, the trolley consists of two ramps and a transport rack supported by metal slides, is intended for crossing the work area for laying the central part of the rigid base by a multiservice vehicle which runs under the multi-level assembling trolley, delivering materials and lining blocks to the tunnel-boring mechanized complex while tunneling. Construction of the ventilation slab and erection of the rigid tunnel base are carried out simultaneously with tunneling using the multi-level assembling trolley and the handling trolley.

EFFECT: reduced labour costs and reduced construction time of the two-lane tunnel due to the simultaneous performance of unrelated operations.

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