Stormwater Management · TITLE 01-25-17 DATE Precast SWM Pond Riser Stormwater Management 2 017...
Transcript of Stormwater Management · TITLE 01-25-17 DATE Precast SWM Pond Riser Stormwater Management 2 017...
Stormwater Management
PCSWM2017A
Stormwater Management
Use
Precast stormwater management structures are typically used for storm water control
ponds, detention, retention, energy dissipation, underground drainage and spring water
control.
Sizes
Precast stormwater management structures are available in all pipe sizes, box sizes and
manhole sizes.
Application
Precast stormwater management structures may be used for the following:
● Pond risers
● Overflow structures
● Underground deten on or reten on
● An seep collars
● Energy dissipaters
● Spring boxes
● Infiltra on systems
Joints
The following joints may be available for utility structures:
● Rubber gaskets
● Pre‐formed mastic or butyl
● Mortar joints
Applicable Specifications
The following specifications apply to Precast stormwater management structures:
● ASTM C 76
● ASTM C443
● ASTM C361
● ASTM C478
● ASTM C877
● ASTM C890
● ASTM C913
● ASTM C990
● ASTM C1577
● Department of Transporta on specifica ons
● Local u lity jurisdic on requirements
TITLE
01-25-17
DATE
Precast SWM Pond Riser
Stormwater Management
20170125TED03
Notes
1) Manhole structures conform to ASTM C478.
Isometric View
Outlet Pipe Opening
As Required
Wall Trash Rack
As Required
Top Trash Rack
As Required
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Steps
As Required
SECTION A-A
A A
TITLE
01-12-17
DATE
Precast SWM-1 Stormwater Management
Structure
Stormwater Management
20170113TED04
Plan View
Isometric View
Notes
1) Manhole sections conform to ASTM C478.
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I.D.
As Required
Wall
Debris Rack
Metal Plate
Fill with
Class A1 Riprap 8''
3'-0''
8'' Ø
Water Quality
Orfice
Bottom of Stormwater
Management Basin
Trash Rack
Steps
If Required
Pipe
As Required
SECTION A-A
A A
TITLE
01-06-17
DATE
Precast Anti-Vortex Device (Cap & Riser)
Stormwater Management
20170113TED04
Plan View
Isometric View
6'' Ø Vent Typ
Notes
1) Precast Anti-Vortex device (Cap & Riser)
conform to ASTM C478.
2) Dimensions subject to permissible variations
of ASTM C478.
3) Inlet area (area between device I.D. and
riser O.D) is greater than outlet area
(area of riser I.D.).
Isometric View
Optional Frame & Grate
6" Ø Vent
Typ
Standard Dimensions
Riser ID Riser OD
Cap ID Cap OD
Notch Dia
Appr Cap wt (tons)
24'' 30'' 48'' 58'' 34'' 1.49
27'' 33
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'' 60'' 72'' 37
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'' 2.28
30'' 37'' 60'' 72'' 41'' 2.26
36'' 44'' 60'' 72'' 48'' 2.22
42'' 51'' 72'' 86'' 55'' 3.16
48'' 58'' 84'' 100'' 62'' 4.27
54'' 66
1
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'' 84'' 100'' 70
1
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'' 4.20
60'' 72'' 96'' 114'' 76'' 5.48
66'' 80
1
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'' 96'' 114'' 84
1
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'' 5.39
72'' 86'' 108'' 128'' 90'' 6.83
78'' 94
1
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'' 126'' 147'' 98
1
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'' 8.97
84'' 100'' 126'' 147'' 104'' 8.90
90° Typ
Inlet Area
30° Typ
Cap Support
Cap (O.D.)
Cap (I.D.)
Hotch Ø
24''
13''
2''
12''
8''
Riser (I.D.)
Riser (O.D.)
Optional 30'' x 30''
Frame & Grate
instead of 6'' Ø vent
Stormwater Management
Open Top Riser vs. Anti‐Vortex Flow Rate Chart
TITLE
01-25-17
DATE
Precast SWM Weir Wall
Stormwater Management
20170125TED01
Notes
1) Weir wall could have orifice openings and/or wier slot along center top.
Isometric View
Orifice Opening
As Required
Weir Slot
As Required
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TITLE
01-25-17
DATE
Precast SWM Level Spreader
Stormwater Management
20170126TED01
Notes
1) Level spreader will be uniform elevation along top to allow a sheet flow of water over it.
Isometric View
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SECTION A-A
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TITLE
01-17-17
DATE
Precast Energy Dissipator
(EG-1 & EG-1A)
Stormwater Management
20170119TED01
Notes
1) Refer to VDOT Road & Bridge Standards for EG-1A grate detail.
2) EG-1 PC Energy Dissipator (without grate).
3) EG-1A PC Energy Dissipator (with grate).
Isometric View
Elevation View
Plan View
3'-0''6'' 6''
6''
4'-6''
1'-0''1'-0''1'-0''
2 1/2 ''2 1/2''
7''
6''
12''
2'-6''2'-3''
6''
6''
3'-4 3/4''
6 1/4''
Paved ditch connected
to EG-1 in field
SECTION A-A
A A
TITLE
01-05-17
DATE
Precast Anti-Seep Collar
Stormwater Management
20170112TED02
Elevation View
Isometric View
Notes
1) Contractor to seal pipe into opening in field.
6'' Min.
As Required
As Required
Pipe Opening
As Required
Round or Square
As Required
TITLE
01-17-17
DATE
Precast 48'' Ø Spring Box
with Solid Flattop
Stormwater Management
20170120TED01
Notes
1) Manhole components to be per ASTM C478.
2) Top 6'' thick for 0' to 20' fill over flattop and 10'' thick for 20' to 50' fill over flattop.
3) Bottom 8'' thick for 0' to 20' fill over flattop and 10'' thick for 20' to 50' fill over flattop.
Isometric View
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30'' Ø (Shown)
or 30'' x 30'' Square Opg
in Floor
Flexible pipe Connector
for 12'' Ø DI Pipe
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48'' (I.D.)
4'-10'' (O.D.)
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