TUNNEL FROM CELLULAR AND BOX-SHAPED TONGUE-AND-GROOVE STRUCTURES Russian patent published in 2015 - IPC E02D29/55 

FIELD: construction.

SUBSTANCE: tunnel mainly for construction in an embankment body under the operating traffic artery comprises the protecting screen from extended elements, each of which contains a pair of elements of the lock connections welded on the surfaces of the adjacent extended elements joined among themselves with formation of a spatial structure reproducing the tunnel contour. Each extended element of the protective screen is designed from H-beam and fitted with an additional pair of elements of lock connections. Elements of lock connections are made from lock part of the steel rolling tongue with the lock providing the possibility of mutual relative rotation of the elements connected in the lock to the pre-set limited angle and fixed on one on longitudinal edges of flanges of the named H-beam.

EFFECT: increase of own bearing ability of the protective screen, strength and reliability of its structure, reduction of deformation of extended elements at failure due to increase of their rigidity.

13 cl, 9 dwg