Atten tanks jd

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DT117/4 Sustainable Build & Design - Class Presentations

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Atten tanks jd

  1. 1. Attenuation Tanks
  2. 2. Areas To Be Covered <ul><li>Effects </li></ul><ul><li>Construction Process </li></ul><ul><li>Joints </li></ul><ul><li>Safety </li></ul><ul><li>Handling </li></ul><ul><li>Maintenance </li></ul>
  3. 3. Introduction <ul><li>Urbanisation </li></ul><ul><li>Rainfall </li></ul><ul><li>Vegetation </li></ul><ul><li>Runoff Water </li></ul>
  4. 4. Effects <ul><li>Natural Drainage Altered </li></ul><ul><li>Rainfall Changes </li></ul><ul><ul><li>4.5cm more than in 1925 </li></ul></ul><ul><ul><li>2/3 Increase in Canada, </li></ul></ul><ul><ul><li>Russia and Europe </li></ul></ul><ul><ul><li>1/3 in Northern Tropics </li></ul></ul><ul><ul><li>and Subtropics </li></ul></ul><ul><ul><li>100% Increase at Equator </li></ul></ul>
  5. 5. Effects In Ireland <ul><li>Flash Floods </li></ul><ul><li>Cork Village Of Schull </li></ul><ul><ul><li>42mm in one day </li></ul></ul><ul><li>Dublin </li></ul><ul><ul><li>56mm in 24hours </li></ul></ul><ul><li>1960-91 Average Rainfall </li></ul>
  6. 6. Attenuation Tanks <ul><li>Underground Storage Systems </li></ul><ul><li>Stores Water During Heavy Weather </li></ul><ul><li>Discharges After </li></ul><ul><li>Flow Regulator </li></ul>
  7. 7. Construction Process <ul><li>Prepare the Floor </li></ul><ul><li>Steel Fixed </li></ul><ul><li>Starter Bars Positioned </li></ul><ul><li>Floor Poured </li></ul>
  8. 8. Pour the Walls & Seal It <ul><li>Lifted into Place </li></ul><ul><li>Waterbar Strip </li></ul><ul><li>EDM Used </li></ul><ul><li>Shuttered & Grouted </li></ul><ul><li>Position Rebars & Steel </li></ul><ul><li>Pour Screed </li></ul>
  9. 9. Other Information <ul><li>Silt Traps, Trapped Gullies, Catchpits and Hydrocarbon Interceptors </li></ul><ul><li>Galvanised Steel </li></ul><ul><li>Access Shafts </li></ul><ul><li>H&S </li></ul>
  10. 10. Capacity <ul><li>Calculations </li></ul><ul><li>Varying Sizes </li></ul>
  11. 11. Joints <ul><li>Watertight and airtight joint system with standard corrugated coupling bands </li></ul><ul><li>Watertight joint system with bridged corrugation, flat coupling bands </li></ul><ul><li>Backfill-tight joint system with standard corrugated coupling bands </li></ul>
  12. 12. Delivering & Handling <ul><li>Delivered from Trailers </li></ul><ul><li>Straps and Padding </li></ul><ul><li>Lifting Equipment </li></ul><ul><li>Proper Storage </li></ul><ul><li>Competent Workers </li></ul>
  13. 13. Maintenance <ul><li>Owner is Responsible </li></ul><ul><li>Mechanical Features </li></ul><ul><li>Access </li></ul><ul><li>Duration </li></ul><ul><li>Zinc Paint </li></ul>
  14. 14. Advantages & Disadvantages <ul><li>Different Uses </li></ul><ul><li>Maintenance Free </li></ul><ul><li>Constructed Offsite </li></ul><ul><li>Fire Resistance </li></ul>

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