Oaks Designer Resource Guide 6.0

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PICP ON SLOPES

For slopes exceeding 5%, use geomembrane check dams to control down slope flows, distribute infiltration over the entire length of the slope and prevent surges from exiting the pavement system at the bottom of the slope.

Surface Water Flows through the No. 8, 89 or 9 stone jointing material between the pavers

Maximum Slope = 12%

Permeable Pavers

Impermeable Membrane (extends minimum 300mm (12”) back behind vertical section) Permeable Subgrade. Prepare according to recommendations in geotechnical report

Bedding Layer 2” ASTM No. 8 Stone

Base Layer 4” ASTM No. 57 Stone Subbase Layer Minimum 6” ASTM No. 2 Stone Optional Geotextile Separation Fabric on bottom and sides of open graded base

Maximum Storage Volume

Orifice Opening in Membrane

Bleed Hole in Membrane

Because conventional pavement bases and subbases are not designed for saturation, they require protection from water infiltration. Separate the two pavement systems with an impermeable barrier (geomembrane or concrete). Also consider sloping the PICP sub-grade away from the adjacent conventional pavements or installing under-drains at the interface. TRANSITIONS TO IMPERVIOUS SURFACES

200mm to 600mm (8” to 24”) wide rebar reinforced concrete header curb (designed by others). Elevation to be 6mm (1/4”) below adjacent pavers and asphalt. Set depth to subgrade.

Jointing Material to bottom of chamfer Concrete Pavers

Saw cut pavement and seal joint

Maintain typical joint width adjacent to curb

Bedding Layer

Base Layer Subbase Layer

Existing asphalt pavement Compacted aggregate base

Optional geotextile around base and subbase

Soil Subgrade

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APPLICATIONS AND SOLUTIONS

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