Biaxial with polymer by extrusion, into a plate, and then punching process longitudinal and transverse stretching. The material in the longitudinal and transverse direction has great tensile strength, such a structure in the soil is also able to provide a more effective force's commitment to spread the ideal chain system to adapt to a large permanent bearer foundation reinforcement. ■ Features 1, increasing the road (to) base bearing capacity to extend the road (to) the base of life. 2, to prevent road (ground) surface subsidence or cracks, keeping the floor neat. 3, construction convenient, saving time, effort and shorten the duration and reduce maintenance costs. 4, Culverts to prevent cracks. 5, to enhance the soil, prevent soil erosion. 6, reducing cushion thickness, saving cost. 7, support the stability of the slope grass mat green environment. 8, can be replaced by metal mesh, used in coal mine roof. ■ Applications for a variety of two-way geogrid dam and embankment, slope protection, wall reinforcement, large airport, parking, terminal yard and other permanent foundation reinforcement. Reasonable for programs on the bridge embankment reinforcement treatment can effectively control the bridge embankment settlement, and makes the bridge between the station and the embankment settlement can smooth the transition for the control of Bump created favorable conditions. A range of applications, a variety of roads, railways, airports subgrade enhancement; 2, large car park and pier freight yard and other permanent foundation reinforced; 3, rail, road slope protection, culvert enhancement; 4-way stretch geogrid reinforced soil after the second increase, and further enhance the soil, prevent soil erosion; 5, mining, tunnel reinforcement. ■ construction methods foundation bed, set the sand cushion (height of not more than 10cm), rolled into the platform, laying grille, vertical axis to be the major force in the same direction, longitudinal lap 15-20cm, horizontal 10cm, lap belt with plastic banding, and in the laying of the grill, every 1.5-2m with the U-nails on the ground, laying the geogrid shall promptly backfill material, laying the geogrid layers, as the technical requirements. Geogrid construction process requiring workers grille paved surface should be relatively smooth, paving layer after passing phenomenon in order to prevent vertical skew, press the width of the white line drawn on the pavement layers or hung, you can Start paving, and then nails fixed grid ends (each with nails 8 meters wide, even from fixed). After the end of the fixed grille, grille with a paving machine will slowly pull forward shop, shop 10 meters long each manual tensioning and straightening time, until the volume grid Puwan, holes under the roll, operation with the former. Puwan roll later 6T-10T road roller in the forward direction from the start point rolling again then. (Such as paving in the surface layer and the leveling layer, steel roller compactor is appropriate; such as grilles laid directly on the concrete pavement, and with the rubber roller compactor is appropriate.) Then shop: to roll as long as the unit laying segment length, the length of the segment to be spread within the covered grill after check once again paving the overall quality, and then went on paving the next paragraph. Paving the next paragraph, the grille and grille can use 10-15CM length of lap and fixed with nails or wedge forward direction to continue to shop after the second paragraph. And so on, with the former operating requirements.