Model Specification For Athletic Field Drainage System
1.1
|
This
work shall consist of providing and placing a drainage system
comprised of a geo-composite, prefabricated, water collection
system (collection system) and the associated water transport
system (transport pipe) as described in the plans. The drainage
system shall be installed in accordance with these specifications
and in close conformity with the locations and dimensions as shown
on the plans or specified by the engineer. The quantities of drainage
system materials as shown on the plans may be increased or decreased
at the discretion of the engineer based on actual site conditions
that occur during construction of the project. Such variations
in quantity will not be considered as alterations in the details
of construction or a change in the character of the work. |
|
| 2.1 |
The
collection system shall be of flexible, prefabricated, rounded rectangular
shaped, composite product. |
|
| 2.1.1 |
The
collection system shall be wrapped with a non-woven geotextile and
shall be a non-woven needle-punched construction and consist of
long-chain polymeric fibers composed of polypropylene, polyethylene
or polyamide. The fibers shall be oriented into a multi-directional
stable network whereby they retain their positions relative with
each other and allow the passage of water as specified. The fabric
shall be free of any chemical treatment or coating, which reduces
permeability and shall be inert to chemicals commonly found in soil.
The geotextile shall conform to the following minimum average roll
values. |
|
| Weight |
ASTM
D-3776 |
4.0 |
| Tensile
Strength |
ASTM
D-4632 |
100 |
| Elongation
% |
ASTM
D-4632 |
50 |
| Puncture,
lb |
ASTM
D-751 |
50 |
| Mullen
Burst, psi |
ASTM
D-3786 |
200 |
| Trapezoidal
Tear, lb |
ASTM D-4533 |
42 |
| Coefficient
of Permeability |
ASTM
D-4491 |
.1
cm/sec |
| Flow
Rate, gpm/ft2 |
ASTM
D-4491 |
100
|
| Permittivity,
1/sec |
ASTM
D-4491 |
1.8 |
| Apparent
Opening Size |
ASTM
D-4751 |
70
Max. US Std Sieve Opening |
| Seam
Strength, lb/ft |
ASTM
D-4595 |
100 |
| Fungus
|
ASTM
G-21 |
No growth |
| 2.1.2
|
The
collection system core shall be made of a high-density polyethylene.
The core shall be constructed using interconnected corrugated pipes
that define and provide the flow channels and structural integrity
of the drain. The geotextile shall function only as a filter. The
core of the collection system shall conform to the following physical
property requirements. |
|
| Thickness,
inches |
ASTM
D-1777 |
1.0 |
| Flow
Rate, gpm/ft* |
ASTM
D-4716 |
30 |
| Compressive
Strength, psf |
ASTM
D-1621
(modified sand method)
|
6000 |
* At gradient = 0.1, pressure = 10 psi for 100 hours.
2.1.3 |
Multi-Flow meets or exceeds these specifications. |
|
2.2 |
The fittings used with the collection system shall be of a "snap
together" design. In no case shall any product be joined without
the use of the manufacturer's connector designed specifically for
the purpose. |
|
2.3 |
Transport pipe shall be either PVC pipe meeting the requirements
of ASTM D-2729 or ASTM F-949, or high-density polyethylene pipe
meeting the requirements of AASHTO M252.2.4
|
|
|
3.0 CONSTRUCTION REQUIREMENTS |
|
3.1 |
The amount of trench excavated at any time shall not exceed the
amount of drain that can be set and backfilled completely in one
working day. The trench shall be 4 inches wide and at the depth
specified in the plans. The collection system shall be centered
in the trench, and backfilled with clean very coarse sand or an
alternate selected by the engineer. |
|
3.2
|
The
trench excavations for the collection system and transport pipe
shall be to the lines and grades shown on the plans. Over excavation
in the bottom of the excavation shall be backfilled to the proper
grade with excavated material or sand prior to the placement of
the collection system. |
|
3.3 |
Fittings shall be installed in accordance with the manufacturer's
recommendations. |
|
3.4 |
Backfill shall be consolidated in accordance with the plans or as
directed by the engineer. |
|
3.5 |
Any damaged collection system, or transport pipe shall be replaced
or repaired by splicing in an undamaged section of like material. |
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Athletic Field Model Specs in PDF Format
service@varicore.com Copyright 2001; Varicore Technologies, Inc. 800-978-8007
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