Agenda

force that can be exerted on the pipe without damaging the
integrity of the pipe or pipe joints. The installation head or
mechanism shall incorporate a gauging system, which will provide
a continuous monitor of the force being applied during the liner
insertion operations. The insertion force used by the Contractor
shall in no case exceed the maximum allowable pushing or pulling
force as calculated in the liner pipe design. Pipe spigots shall be
provided with “homing” marks to ensure that the joint is properly
completed.

responsible for dewatering of each shaft. The shaft(s) shall be removed
and backfilled as soon as practical upon completion of the liner pipe and
the surface restored in accordance with the applicable provisions of these
specifications.

of the existing pipe; it shall be the Contractor’s responsibility to
install the renewal pipe to result in an acceptable grade without the
sag. The Contractor shall take in necessary measures to eliminate
these sags, as approved by the Owner by pipe renewal; digging a
sag elimination pit and bringing the bottom of the pipe trench to a
uniform grade in line with the existing pipe invert or by other
measures that shall be acceptable to the Owner.

Prior to construction and delivery of materials, the Contractor shall obtain
the necessary permits and details or traffic flag persons, as appropriate.

1.

It is the intent of this contract that traffic be maintained at all times
in the areas of construction. The Contractor may be required to
halt operations and/or transport material to areas beyond immediate
work locations in order to allow minimum traffic disruptions.
Access to the site by emergency vehicles, school buses, and
residents shall be maintained at all times.

Notes: ‘Design of the renewal pipe shall be based on prism load on the
renewal pipe, using the outside diameter of the renewal pipe in the
calculation.

“Impact factors to be included when depth of cover is less than 3 feet
per values recommended by AASHTO.

*Impact factors to be included when depth of cover is less than 10
feet per criteria established by AREA “Manual of Recommended
Practice”.

no structural support to the renewal pipe, except for transmitting

loads.
2. Omitted.
B. Design Performance Limits and Design Parameters
1. The renewal pipe shall be designed such that the pipe shall not fail,

collapse, buckle, crack, or delaminate under loads. The maximum
long-term (50 years) calculated deflection under all loads shall not
exceed five percent (5%). The maximum bending strain (50 years)
developed in the wall shall not exceed three percent (3%) for

HDPE pipe.

10.

B. Joints

Each standard pipe unit shall be clearly and permanently marked
with the nominal pipe size, the dimension ratio, the polyethylene
grade per ASTM D3350, a manufacturing standard reference e.g.
ASTM F 714, production code, date of manufacture, and
manufacturer’s trademark.

PART 2 - PRODUCTS

2.1 MATERIALS

A. Solid Wall High Density Polyethylene Pipe (HDPE)

1.

The HDPE renewal pipe shall be manufactured from a high

density, high molecular weight polyethylene resin, which conforms

to ASTM D-1248 and meets the requirements for Type III, Class B,

Grade P34, Category 5, and has a PPI rating of PE 3408, when

compounded. The pipe produced from this resin shall have a

minimum cell classification of 345434C or D under ASTM D 3350

and shall have the following physical properties:

The Contractor shall submit the method(s) and equipment he proposes to use
for repairs of non-compliant renewal sections, defects, test sample section
repairs, or other deformities in the completed liner pipe. Such repairs shall
be in accordance with the liner manufacturer's recommended written
procedures and techniques.

unless written authorization is obtained from the Owner for surface
excavations to remove blockages.

5. Hours of operation, sequencing of work description, number of
shifts, number of crews, and expected time to complete the work
for the rehabilitation method proposed shall be described.

6. The Contractor shall describe any surface activities that will be
required, and any mitigation measures that will be used to reduce
surface impacts as part of the rehabilitation method proposed.