PROTECTIVE SCREEN Russian patent published in 2019 - IPC E21D9/04 

FIELD: construction.

SUBSTANCE: invention relates to the field of construction and can be used when passing tunnels, workings in loose rocks by creating protective screens for the construction of overpasses, pedestrian crossings, at the intersection of embankments of railways and highways and other artificial structures. Technical result is achieved by the fact that the protective screen includes a number of interconnected pipes or sections consisting of two or more pipes, in each of which a longitudinal cut is made to enter the adjacent pipe and a window for accommodating transverse reinforcement, stiffening ribs are installed along the longitudinal cuts, and the walls of the longitudinal cuts are associated with the locking-guiding device, wherein the protective screen is made with a leader pipe, which has two longitudinal cutouts for entering and fixing by means of a locking guide for the pipes adjacent to the leader pipe, and, accordingly, two rows of stiffeners along these cuts, while the longitudinal cuts are made with such a distance between their edges, that the ratio of the diameter of the pipe and the distance between the centers of the circles of adjacent pipes lies within the range of 1/(0.5–0.9), the windows for accommodating transverse reinforcement are made of such a height that the ratio of the distance between the edges of the longitudinal cuts and the height of the windows lies within the range of 1/(0.6–0.99).

EFFECT: technical result is the improvement of the design of the protective screen to eliminate distortions between the sections and the reduction of the pushing force applied to the section during the construction of the protective screen.

1 cl, 2 dwg