METHOD TO ERECT SECTION OF ADJACENCY BETWEEN RUNNING TUNNEL OF SUBWAY LINE UNDER CONSTRUCTION AND RUNNING TUNNEL OF EXISTING LINE Russian patent published in 2012 - IPC E02D29/45 

FIELD: construction.

SUBSTANCE: method to erect a section of adjacency between a running tunnel of a subway line under construction to a running tunnel of an existing line includes erection of adjacency structures by making vertical walls from secant bored piles of the tunnel of the line under construction at both sides of existing tunnels, mining a pit with soil excavation, installation of struts from steel pipes with the possibility to ensure their resting against walls from secant bored piles, erection of a solid embracing cover with the possibility to ensure its resting in indents arranged on erected walls from secant bored piles, and with dismantling of a vertical wall of tunnel lining of an existing line at the side where a line under construction adjoins. Upon erection of a solid embracing cover, inside the tunnel of the existing line at the side where the tunnel of the line under construction adjoins, indents are cut in a track concrete with a rated pitch along axes of sleepers with width of more or equal to 650 mm, length equal to the width of the existing running tunnel and depth to the top of reinforcement frames of the tunnel tray. On the bottom of the indents a strengthening reinforcement is installed with length to the walls from secant bored piles, as well as a metal insulation along the indent width, which is rigidly joined with a tray by means of anchors with a pitch of 500 mm with subsequent concreting with the possibility to ensure shoulders for welding to the sheets of metal insulation of the adjacent indent. Metal insulation is brought out to the walls from secant bored piles with subsequent closure of insulation along the inner contour of adjacency and erection of a protective wall along the metal insulation. Then the track concrete is laid, as well as a rail sleeper grid on the adjacency section, afterwards backfilling with sand soil is carried out.

EFFECT: lower labour inputs and material intensity of works production when erecting a joint between a running tunnel of a subway line under construction and a running tunnel of an existing line.

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