METHOD OF TUNNEL CONSTRUCTION Russian patent published in 2017 - IPC E21D9/04 E21D11/04 

FIELD: construction.

SUBSTANCE: tunnel construction method includes the creation of a protective screen in the form of a spatial structure by stepping through the tube sections of the screen, excavating the rock from the squeezed section, cutting the sector from its internal cavity by the amount of punching, setting the next section into the cutout, mating with the locking/guiding device. Before the subsequent section is squeezed, the sections are welded together, the reinforcing frame is laid and the inside tube space is filled with concrete. In this case, before the laying of the reinforcement frame, continuous longitudinal cuts are made in the contacting walls of the pipes without disturbing the annular end parts of the pipes, leaving in the calculated places, depending on the diameter of the tube, the beacon strips for fixing the location of the stiffeners. The stiffeners are installed. Through continuous cutouts in the walls of the pipes and along each pipe, longitudinal and transverse packing of the reinforcement is produced, forming a single armo-frame. Filling the inside of the pipe with concrete to convert the protective screen into a tunnel.

EFFECT: increasing the economy and safety of conducting underground works.

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