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.
Prior to construction of the sliplining repair, the Contractor shall submit
shop drawings, details, and descriptions to include construction methods and
equipment, process description, access locations, receiving manhole
locations, flow handling, bypass pumping, flow diversion, and or dewatering
methods and design calculations to assure that the work can be
accomplished as specified in this section. Pre- and post-construction video
documentation shall be provided to the Engineer as specified in pertinent
sections of the contract.
For the pneumatically assisted sliplining method(s) of pipe rehabilitation, the
Contractor shall submit the following information specific to the proposed
project.
SECTION 02769
PNEUMATIC ASSISTED AND SEGMENTAL STATIC HDPE SLIPLINING
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and
Supplementary Conditions, apply to this section.
1.2 SUMMARY
A. This Section includes the following:
B. MATERIALS AND CONSTRUCTION
