METHOD TO REINFORCE DEFECTIVE LINING OF TUNNEL Russian patent published in 2014 - IPC E21D9/01 

FIELD: construction.

SUBSTANCE: invention relates to the field of construction, namely, to methods of repair of subway tunnels arranged in complicated mining and geological conditions. The method to reinforce defective lining of the tunnel, which was subject to subsidence due to unstable and waterlogged base, consists in strengthening of a track bed and lining of the tunnel. Strengthening of the track bed and lining of the tunnel is carried out by resting a track bed onto a layer of underlying dense soils, arranged at the depth under the layer of unstable and waterlogged soil. The support of the tunnel lining onto the layer of underlying dense soils is carried out by arrangement of rows of soil and cement piles, the head of which is fixed in a concrete base of the track bed, and the base is arranged in the layer of underlying dense soils.

EFFECT: provision of performance of repair works for strengthening of a track bed and tunnel lining without disturbance of subway operation and schedule of train movement, in increased bearing capacity.

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