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Retem 3D Steel Grid

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Retem 3D Steel Grid

  1. 1. Retem Applications for Land Stabilization Leo Toledano – CEO RETEM 3D Steel Grid Ltd.
  2. 2. Topics <ul><li>Retem Grid description and specifications </li></ul><ul><li>Stabilization with concrete: </li></ul><ul><ul><li>Ditches and water ways </li></ul></ul><ul><ul><li>Agricultural canals </li></ul></ul><ul><ul><li>Spillways </li></ul></ul><ul><ul><li>Inlets and outlets </li></ul></ul><ul><li>Stabilization with rock and soil. </li></ul><ul><li>Advantages of Retem in drainage installations. </li></ul>
  3. 3. Retem Grid description and specifications
  4. 4. The 3-D Steel Grid is a three dimensional web made of galvanized steel deployed on two levels of parallel steel strips linked by oblique ribs without welding points.
  5. 5. Pallet of Retem 3D steel Grid panels <ul><li>Pallets of 160 panels – 3.2 x 1.3 cm each. </li></ul><ul><li>Total area 500 m 2 , total weight 1.2 tons. </li></ul><ul><li>Height varies according to designer requirements from 4 cm to 8 cm. </li></ul><ul><li>Steel thickness is 1.40 mm. </li></ul><ul><li>Weight per square meter: 2.25 kg. </li></ul>
  6. 6. Main applications in erosion control Reinforcement for concrete lining JK Spillway
  7. 7. Reinforcement for concrete lining Waterway Construction Method
  8. 8. Retem Panels Brought to Working Site
  9. 9. Worker Laying Panels
  10. 10. Stake Insertion
  11. 11. 3D Grid with Pressure Hole
  12. 12. Concrete Filling Requirements <ul><li>For 4 cm high grid, 8 cm. thick concrete (covering of steel, 2 cm on each side). </li></ul><ul><li>For 8 cm high grid, 12 to 14 cm thick concrete (covering of steel, 2 to 3 cm on each side). </li></ul>
  13. 13. Spreading the Concrete
  14. 14. 10 Years of Experience <ul><li>Over 1,500,000 square meters of lining. </li></ul><ul><li>Not a single repair request has been registered. </li></ul>Ditches in a US Army facility
  15. 15. Flexible Adaptation to Ditch Contour
  16. 16. Ditch on Cracked Rock Shallow ditch lining prevents water infiltration through cracked rock and weakening of the road pavement.
  17. 17. Narrow Steep Sides Retem is highly flexible. This allows the building of narrow water works in rural areas.
  18. 18. 70 Foot Wide Waterway
  19. 19. Typical Rough Finish Colored Texture
  20. 20. A Rough Finish Retaining Wall
  21. 21. River Bank Protection 3D steel grid flexibility allows to build reinforcement belts as an integral Part of the construction by folding the grid.
  22. 22. Reinforcement for Concrete Structure Spillways
  23. 23. Spillways The steel grid provides reinforcement for the chute and its belts in one monolithic structure.
  24. 24. Inlet and Ditch
  25. 25. Rock Filling on Reservoir Bank
  26. 26. Stabilizing collapsed river banks Seis, Italy, 2000
  27. 27. Slopes under a road Bayern, Germany 3. Vegetalisation (seeds and fertilizers) 2. Inserting stones and soil 1. Anchoring the 3D grid
  28. 28. Panel installed for Soil Filling
  29. 29. Same Slope after One Year
  30. 30. <ul><li>Used with anchors and projected concrete, 3D web provides long lasting protection to hewn hillsides. </li></ul><ul><li>Outstanding results are obtained by use of Retem 3D grid in erosion prevention. </li></ul><ul><li>Spillways designed with 3D grid in all lengths and inclinations are built in a single operation without using wood frames. </li></ul><ul><li>Can be implemented in the most difficult soil and in the most extreme topography. </li></ul><ul><li>Fast execution. </li></ul><ul><li>Large waterways and narrow canals are being stabilized with 3D grid lining. </li></ul><ul><li>Long-lasting and full protection. </li></ul><ul><li>No requirements for skilled workers. </li></ul><ul><li>Low cost of construction. </li></ul><ul><li>Slopes of very steep inclination are easily treated. </li></ul><ul><li>No maintenance cost. </li></ul>3D Grid in Land Stabilization
  31. 31. Other Applications
  32. 32. <ul><li>Panels are held together using staples. </li></ul><ul><li>Straightened by horizontal reinforcement. </li></ul><ul><li>Lined on both sides with a steel net. </li></ul><ul><li>Filled with a concrete pump from bottom to top. </li></ul><ul><li>Finished by traditional means. </li></ul>Building Method
  33. 33. Typical Wall Reinforcement
  34. 34. Internal Partitions
  35. 35. Retem 3D grid at Euro-Disney
  36. 36. <ul><li>3D grid is preformed to radius of the tunnel </li></ul><ul><li>The grid is fixed with or without LDPE sheets sealing against water infiltration. </li></ul><ul><li>Filled with projected concrete. </li></ul><ul><li>Lining is continuous in rock soil. </li></ul><ul><li>Lining is made between steel beams in soft soils. </li></ul>3D Steel Grid in Tunnels
  37. 37. Grid Laying in Tunnel
  38. 38. Finishing Tunnel Lining
  39. 39. 3D Grid in Rehabilitation of Old Sewage Conduits <ul><li>3D grid is preformed to radius of the pipe. </li></ul><ul><li>Installed against pipe wall qualities. </li></ul><ul><li>Filled with projected concrete. </li></ul>
  40. 40. Casting Concrete on Sewage Pipe
  41. 41. <ul><li>Houses, walls, and fences using mud, mixtures of mud and straw, or mud and cements may provide cheap housing solutions </li></ul>3D Grid Filled with Local Materials.
  42. 42. Concrete/Mud Filling for 3D Steel Grid Using mud, mixtures of mud and straw, or mud and cements with a 3D Steel reinforcement may provide cheap housing solutions in poor areas.
  43. 43. Retem 3D Steel Grid Ltd. P.O.Box 14164 Jerusalem 91141 Tel: 972 2 6283474 Fax : 972 2 6274067 E-mail: retem@retemsteel.com

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