Increases the stability of the embankment, prevent slippage, landslides, subsidence and other phenomena. On the other hand, the load applied to the upper part can be evenly distributed in the formation. That is, when the overlying soft loads may produce shear puzzle destroyed, geogrid will prevent the emergence of the failure surface, thereby increasing the bearing capacity. When geogrid been concentrated stress, the high elastic modulus geogrid vertical component of the force will be produced, distributed and offset part of the load, effectively improve the bearing capacity, this effect can effectively improve the subgrade load rate, shorten durations. This mechanical occlusion effect through the soil has good overall shear capacity. (3) the material properties and requirements. Requirements with clean sand cushion coarse sand, clay content should be less than 5%, in order to facilitate the formation of drainage channels. Geogrid is a new kind of polymer material, the bi-directional stretch, its longitudinal and transverse tensile strength evenly, and has good ductility, steel geogrid high fatigue resistance and corrosion resistance. Its light weight, convenient construction. The foundation treatment used geogrid is QLGSG50-50 type, elongation rate of 5%, and the longitudinal and transverse tensile strength are 50kN / m two-way geogrid, mesh size of 15mm × 15mm, width is 4m , increase length of 50m. (4) geogrid Cushion foundation construction procedures and points. ① first leveling, clearing topsoil and drain surface water. ② ③ filling subgrade soil should be layered and meet the appropriate regulatory requirements, in addition to material transport vehicles should be avoided in the good and the tension has been paving the grille positioned directly on rolling. ④ Construction of embankment fill rate should be controlled and strengthen settlement and lateral displacement of the observation, to prevent embankment instability. Geogrid improve the bearing capacity and increasing the stability of the foundation of uneven subsidence regulation, Plastic Geogrid can quickly reduce the subgrade settlement of differences. Geogrid and gravel layers together constitute much larger than the soft soil stiffness composite cushion, played on the upper part of the applied load redistribution function, its role and the foundation drainage penetration force tends to balance, so soft ground to speed up drainage consolidation, contributed embankment uniform settlement, embankment smooth. Feicheng Engineering Plastics Co., Ltd. Chairman: Zhang Yintang Sales Hotline: 13805382217 Fax :0538-3511466 E-mail: fclianyigroup@163.com Address: High-tech Development Zone, Shandong fat city URL: http://www.chinesegeogrid.com/