Difference between revisions of "Talk:Permeable Pavement Design Guide"
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Revision as of 19:30, 26 September 2017
LID Practice | CANADA | United States | |||||||||||||||||
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Permeable Pavement | CVC+TRCA (Factsheets-2010)[1] | Toronto- 2016 | LID-SWM Guide 2010[2] | LID-Design Guide Edmonton- 2014 | New York State SWM Design Manual-2015 | Massachusets SW BMP-2013 | District of Columbia-SWM Guidebook-2010 | San Diego LID Handbook-2014 | Alabama LID Handbook-2013 | W. Virginia-SWM design guidance manual-2012 | Rhode Island-SW design & Installation Standards Manual-2012 | Minnesota SW Manual-2016 | Tennessee-LID Development-SWM 2016 | Texas-LID Technical Guidance Manual-2013 | |||||
(Impervious /permeable pavemet) area | <= 1.2 | <= 1.2 | < =3.0 | Limit CDA to small adjacent impervious area | 2-5 X the SA of PP | 2:1 | 3:1 | 2:1 | DA nolimit, runoff from surrounding areas minimized | 2:1-5:1 Note 1 | L1- 1:1, L2- No IP Note 2 | 1:1 | |||||||
Depth to high water table (m) | 1 | at least 1 | 0.6-1.0 | ||||||||||||||||
Slope of permeable pavement surface (%) | 1-5 | 1-5 | 0.5-2.0 | ||||||||||||||||
A capped vertical sandpipe, perfored instaled to the bottom of the facility to monitor drainage time | 100-150 mm | ||||||||||||||||||
Botom slope if the system is not designed for infiltratin (%) | 1-5 | 1-5 | |||||||||||||||||
Drainage time of the pavement reservoir after the storm event | < 72 hr | recommended 48 | |||||||||||||||||
Setback from building Foundation(m) | 4 | 4 | |||||||||||||||||
Material | |||||||||||||||||||
Pervious Concrete | |||||||||||||||||||
Compressive strength (Mpa) | 5.5-20 | PA and PC must have 10-25% VS,sub-base 40% VS | PC VS:15-25%; PA VS: 15-20%; PICP VS:8-20%; CGP VS:20-50% | PICP OA: 5-15%, CGP OVC: 20-50%; PC VC:15-25%; PA VC: 15-20% | PA/PC: 10-25% void space, pavers 15% void ratio | ||||||||||||||
Void ratio (%) | 14-31 | 15-25 | 14-31 | ||||||||||||||||
Permeability (mm/hr) | 900-21500 | 900-21500 | |||||||||||||||||
Thickness (mm) | 100-150 | 100-150 | 100-150 | ||||||||||||||||
Porous Asphalt | |||||||||||||||||||
Air voids (%) | min. 16 | min. 16 | min. 16 | ||||||||||||||||
Thickness (mm) | 50-100 | 50-100 | 50-100 | ||||||||||||||||
Permeable Pavers | |||||||||||||||||||
Diameter of crushed aggregate (mm) | 5 | 5 | |||||||||||||||||
Thickness for vehicular applications (mm) | 80 | 80 | |||||||||||||||||
Thickness for pedistrian applications (mm) | 60 | 60 | |||||||||||||||||
Joint widths for pedistrian applications (mm) | < 15 | < 15 | |||||||||||||||||
Interlocking concrete pavers | |||||||||||||||||||
Thickness (mm) | 60-80 | ||||||||||||||||||
Stone reservoir | |||||||||||||||||||
Filter course diameter | 10-12 mm | ||||||||||||||||||
Depth below base pf pavement | 25-30 | ||||||||||||||||||
Depth below subbase, mm | 50-500 | ||||||||||||||||||
Subbase diameter | 25-40 mm | ||||||||||||||||||
Depth below filter course | 50-250 mm | ||||||||||||||||||
Granular subbase stone diameter (mm) | 50 | 50 | 50 | > 50 | |||||||||||||||
Void space ratio | 0.4 | 0.4 | |||||||||||||||||
Granular base stone diameter (mm) | 20 | ||||||||||||||||||
Void space ratio | 0.3-0.4 | ||||||||||||||||||
Bedding stone diameter (mm) | 5 | 5 | 5 | ||||||||||||||||
Void ratio (%) | 0.3-0.4 | ||||||||||||||||||
Time to drain stone bed, hr | 24-72 | ||||||||||||||||||
Thickness (mm) | 40-75 | 40-75 | 40-75 | ||||||||||||||||
Geotextle | |||||||||||||||||||
Between stone reseroir and native soil | |||||||||||||||||||
Underdrain (optional), infiltratio rate <15 mm/hr | |||||||||||||||||||
Diameter (mm) | >= 100 | > 200 | >= 100 | ||||||||||||||||
Diameter of perforations in pipes (mm) | 10 | 10 | |||||||||||||||||
Above the bottom of the gravel layer (mm) | 100 | ||||||||||||||||||
Facilties reciving road runoff are not located within time of travel | 2 | 2 | |||||||||||||||||
wellhead protection areas, year | |||||||||||||||||||
Subsoil infiltration rate, mm/hr. | >= 13 | ||||||||||||||||||
When contact with anti-skid material | >= 26 | ||||||||||||||||||
When contributing area > 4 hectares | >=35 | ||||||||||||||||||
Emptying Time, hrs. | < 72 |