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
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