Construction Technology of Reinforced Earth Retaining Wall of Expressway Geogrids

During the construction of expressway construction projects, the types of retaining walls commonly used by construction units include: rubble concrete retaining walls, reinforced soil retaining walls and anchor retaining walls. Among them, reinforced earth retaining walls are the most frequently used, mainly because this type of retaining wall is convenient to construct, has high construction efficiency, and can effectively shorten the construction period and reduce construction costs. The structure of the reinforced soil retaining wall is simple, mainly composed of backfill soil, tie belts, and blocks. Its function is to resist the lateral pressure transmitted from the soil. Reinforced soil retaining walls are similar to traditional retaining walls, except that additional tie bars are added to the soil, and the friction between the tie bars and the soil is used to improve the stability of the soil structure.

During the process of laying the geogrid, it is necessary to ensure that the tie bars must not overlap each other, but the structural tie bars and stress tie bars can be laid overlapping each other. Backfilling layers should be set up between the tie bars in strict accordance with the specifications to increase the stress length of the tie bars. The latches that secure the panels must pass through the grille. The geogrid laying should be kept flat and no kinks should appear. If it is necessary to extend the tie bars, ensure that the strength of the tie bars at the connecting parts meets the design requirements. Heavy vehicles and equipment are strictly prohibited from passing through tie bars that have not been covered, and heavy objects are not allowed to be piled on them. In order to ensure that the quality of the geogrid is not affected, it must be ensured that it will not be exposed to sunlight or rain during the storage process, and the geogrid should not be stored for a long time.

Reinforced soil retaining wall is a reinforced soil structure mainly composed of filling soil, tension belts and facing blocks. It mainly plays the role of bearing the lateral pressure of the soil body. It implants tie bars into the traditional retaining wall structure, and effectively improves the integrity of the soil structure through the friction between the tie bars and the soil, thereby ensuring the stability of the soil. Proficient in the construction technology of reinforced soil, and constantly accumulate experience from actual construction to improve the efficiency and quality of reinforced soil construction. It will also help to strengthen the standardized construction effect, vigorously promote the craftsman spirit, and help create high-quality new elements. Renovate and expand highway quality projects and ecological projects.