वर्णन

Plastic Geogrids: Manufactured using polypropylene (PP) or polyethylene (PE) as raw materials through extrusion, punching, and stretching processes; they are classified into two types: uniaxial and biaxial.

Uniaxial Geogrids: Stretched along the longitudinal direction, exhibiting extremely high tensile strength and modulus in the longitudinal axis; suitable for roadbed reinforcement.

Biaxial Geogrids: Stretched in both the longitudinal and transverse directions, possessing high tensile strength in both axes; suitable for large-area foundation reinforcement.

Steel-Plastic Geogrids: Composites of high-strength steel wires and polyethylene or polypropylene, manufactured via ultrasonic welding. They feature high junction strength (resistance to separation), excellent resistance to acid and alkali corrosion, and are suitable for permanent engineering structures.

Fiberglass Geogrids: Composed of fiberglass materials coated with modified asphalt. They are characterized by high tensile strength, low elongation (<3%), negligible long-term creep, and excellent thermal stability; commonly used for crack prevention in asphalt pavements.

Polyester Warp-Knitted Geogrids: Fabricated using high-strength polyester fibers with a warp-knitted, oriented structure. They exhibit minimal difference between longitudinal and transverse strengths, possess strong resistance to UV aging, and provide excellent interlocking capabilities with soil or crushed stone aggregates.

Engineering Applications and Construction Methods

Primary Application Scenarios:

Roadbed and Foundation Reinforcement: Used for reinforcing soft soil foundations in highways, railways, and airport runways. This application increases bearing capacity, reduces the required thickness of the cushion layer, and prevents ground subsidence.

Slope and Retaining Wall Protection: Suitable for slope stabilization and the reinforcement of high-grade retaining walls. They effectively restrain the lateral displacement of soil masses, enhance structural stability, and prevent soil erosion. Specialized Engineering Applications: Designed for deep-sea operations and embankment reinforcement, addressing issues of reduced strength and shortened service life often encountered by gabions subjected to seawater erosion; also utilized for the reinforcement of mines and tunnels, as well as the structural strengthening of culverts.

Key Guidelines for Installation and Placement:

Placement Location: Typically installed atop the sand cushion layer following the excavation of the foundation bed; the longitudinal axis should be aligned with the primary direction of anticipated structural stress.

Overlapping and Anchoring: Longitudinal overlaps should measure 15–20 cm, while lateral overlaps should measure 10 cm; overlap joints are to be secured using plastic ties. The material should be anchored to the ground using U-shaped pins spaced at intervals of 1.5–2 meters.

Filling and Compaction: Fill materials should ideally consist of gravelly or sandy soils, with a maximum particle size not exceeding 15 cm. Compaction should proceed in a sequence starting from the outer edges and moving toward the center; the roller drum must not come into direct contact with the reinforcement grid itself.