GEOGRID OR MESH STRUCTURE FOR SOIL SURFACE REINFORCING Russian patent published in 2008 - IPC E02D17/20 D03D15/00 D03D13/00 

FIELD: fixed constructions; reinforcing of the soil surface of road slopes and shore lines, protection of mainline pipelines against soil erosion using geogrids.

SUBSTANCE: geogrid comprises set of flexible tapes made of a woofed structure material that are set on edge and attached one to another with seams to form a meshed structure when the grid in set position. The tapes are made of a material having a woofed structure formed of 150 to 300 polypropylene threads in warp direction and of polypropylene fibrillated or multifilament threads in weft direction, and having a breaking force not less than 100 kN/m. The used seams are shuttle-type seams with bar tacks. The length of the geogrid in its set position is from 10 to 20 m, the width is up to 10 m, and the height - from 50 to 150 mm. The geogrid mesh sides are from 50 to 500 mm in its set position in longwise and crosswise directions. The thickness of flexible woofed tape is from 1.0 to 2.0 mm. The seams are stitched vertically in relation to the flexible edges with twisted sewing threads, made of polyether or polyamide or other synthetic threads with a breaking load not less than 60 N, ensuring a minimal breaking load of the seam not less than 50% of the tape breaking load of the tapes.

EFFECT: enhancement of the geogrid performance characteristics; ultraviolet rays resistance of the material; biological stability; environmental security; maintaining stable characteristics to allow using the geogrid at all times and at all temperatures.

4 cl, 4 dwg, 1 tbl