CASE STUDY

  • Location :Kenya
  • Product(s) : Biaxial PP Geogrid
  • Application : Road Reinforcement

Issue

In the process of backfilling, the bulldozer is used to simply fill the backfill, so that the thickness of the backfill exceeds the required standard of the project, which will lead to poor compaction of the subgrade and pavement in the backfill, thereby affecting the stability of the subgrade. The phenomenon of subgrade settlement will seriously affect the construction quality of road engineering.

Solution

Biaxial  PP geogrid is a two-dimensional grid or a three-dimensional grid screen with a certain height made of polypropylene, polyvinyl chloride and other macromolecular polymers by thermoplastic or molding. When used as a civil engineering, it is called a geotechnical grid. grille.

It can effectively improve the interlocking and occlusal effect of the reinforced bearing surface, greatly enhance the bearing capacity of the foundation, effectively restrain the lateral displacement of the soil, and enhance the stability of the foundation. Compared with traditional materials, it has the characteristics of high strength, strong bearing capacity, corrosion resistance, anti-aging, large friction coefficient, uniform holes, convenient construction and long service life. Biaxially oriented plastic geogrid has great tensile strength in both longitudinal and transverse directions. This structure can provide an ideal interlocking system for more effective force bearing and diffusion in the soil, and is suitable for large-area permanent Bearing foundation reinforcement.

Biaxial PP Geogrid for Road Reinforcement Project in Kenya
Biaxial PP Geogrid for Road Reinforcement Projects in Kenya

Features

  • Good flame retardant properties.
  • Friction is not easy to generate static electricity.
  • Easy to wash coal.
  • Strong anti-corrosion ability and anti-aging.
  • Easy to construct and transport. The plastic mesh is relatively soft, and it is not suitable for workers to be scratched during construction, and it has the advantages of easy curling and bundling, mining grid cutting and light weight, so it is convenient for underground transportation, carrying and construction.

6)Strong bearing capacity in both vertical and horizontal directions. Because the plastic mesh is biaxially stretched instead of woven, the mesh creep is small and the mesh size is uniform, which can effectively prevent the falling of broken coal and protect the safety of underground workers and the safety and security of underground workers. Safe operation of minecarts.

Role in engineering

The biaxial PP geogrid is suitable for all kinds of dam and roadbed reinforcement, slope protection, cave wall reinforcement, foundation reinforcement for permanent load such as large airports, parking lots, docks and freight yards, mines, tunnel reinforcement.

  1. Increase the bearing capacity of the road (ground) foundation and prolong the service life of the road (ground) foundation.
  2. Prevent the road (ground) from collapsing or crack, and keep the ground beautiful and tidy.
  3. The construction is convenient, time-saving, labor-saving, shortening the construction period and reducing maintenance costs.
  4. Prevent cracks in culverts.
  5. Strengthen the soil slope to prevent soil erosion.
  6. Reduce the thickness of the cushion and save the cost.
  7. Support the stable greening environment of the grass-planting mesh mat on the slope.
  8. It can replace metal mesh and be used for false roof mesh in coal mines.
  9. Suitable for slope protection of railways and highways.

Construction points of geogrid:

  1. Ground treatment

First, the surface of the roadbed should be leveled and rolled, and the flatness should be no more than 15mm. The compaction must meet the design requirements of the drawing. The surface of the roadbed is strictly prohibited from gravel, tools and other sharp objects.

  1. Geogrid laying
  2. When storing and laying geogrids, avoid exposure to sunlight and prolonged exposure to avoid performance deterioration.
  3. Lay perpendicular to the direction of the line, the lap joint meets the requirements of the design drawings, the connection is firm, the strength of the joint in the force direction is not lower than the design tensile strength of the material, and the overlapping length is not less than 20cm.
  4. The quality of the geogrid conforms to the requirements of the design drawings.
  5. The construction shall maintain continuity without distortion, wrinkle and overlap. Pay attention to tightening the grille to make it bear the force, and manually tighten it to make it even, flat and close to the lower bearing surface, and fix it with measures such as inserting nails.
  6. When the geogrid is used, the direction of the long hole is the same as the direction of the cross section of the line, and the geogrid should be straightened and flattened. Grille ends are treated as designed.
  7. Fill the geogrid after paving, and the interval is no more than 48h to avoid direct sunlight exposure.

After the geogrid has been laid, it should be filled. When filling, according to the geogrid, fill the two sides of the grille first, and then fill the middle of the grille. It is symmetrical according to the requirements of the drawings, and it is strictly forbidden to fill the middle of the subgrade first. The filler is not allowed to be unloaded directly on the geogrid, and unloaded on the pavement that has been laid, and the unloading height is not more than 1m. Vehicles and construction machinery are not allowed to walk directly on the paved geogrid, but only along the direction of the roadbed.

Summary

PP plastic geogrid is made of high molecular polymer through extrusion, forming into a plate, punching, and then stretching longitudinally and transversely. The material has great tensile strength in both longitudinal and transverse directions. This structure can also provide an ideal interlocking system for more effective force bearing and diffusion in soil, and is suitable for long-term bearing in large areas. foundation reinforcement.

Specifictions of Biaxial PP Geogrid for Road Reinforcement Project in Kenya

  • Total quantity – 92,600 square meters
  • Each roll size –  6m*50m
Biaxial PP Geogrid Fabric for Road Reinforcement Project in Kenya

About BPM

BPM manufactures and supplies many types of effective and state of the art geogrid, geomembrane, geotextile, and geosynthetics to over 36 countries. Our main innovative, high quality geogrid products include plastic biaxial geogrid, fiberglass geogrid, plastic uniaxial geogrid, warp knitting polyester geogrid, and steel plastic georgic mesh, etc.  BPM brand high quality geosynthetic products had been certificated by the ISO9001, ISO14001,OHSAS18001, Soncap, SASO and BV, SGS and Intertek, etc.

If you have any questions or inquiries, please fill in and submit the form to contact us.