State of Technology Report for Force Main Rehabilitation, Final ...

Technology/Method Fold -and - Form PVC/ Thermoformed
Installation
Methodology
High pressure water jet and CCTV inspect the line before installing liner. Heat
the coil of folded flat AM-Liner II in the trailer until it is flexible enough to
uncoil and pull through the shaping device and into the host pipe. Shaping
device located at entrance to host pipe, or alternatively on back of heating trailer.
High pressure water hose from cleaning truck is connected to the water spray
nozzle assembly on the shaping device. The liner is pulled from the reel, the end
(3 feet) folded over, and holes drilled for attachment of the pulling cable. The
liner is then winched through the shaping device, after flow of water to the spray
nozzles is started. The liner is pulled until it arrives at the downstream pit
(manhole) and is brought to street level. The liner is cut at street level at both
ends, leaving several feet of extra liner for stress relief. Steam is applied to the
liner from the upstream free end. The pressure in the liner is controlled with the
release of steam at the downstream end. A temperature of 200 o F is maintained
for the predetermined length of time. The cooling process is begun by switching
from steam to compressed air. The pressure is maintained for 30 minutes after
the liner has cooled to 80 o F. The pressure is released and the ends trimmed. The
liner is CCTV inspected and service connections reinstated robotically.
QA/QC Field samples collected per ASTM F1867, Section 7.3. Leakage test after cool
down, and before reinstatement of connections.
IV. Operation and Maintenance Requirements
O&M Needs None identified.
Repair Requirements
for Rehabilitated
Sections
None identified.
V. Costs
Key Cost Factors Not available.
Case Study Costs Not cost competitive with CIPP above 12”
VI. Data Sources
References AM-Liner Data Sheet, AM-Liner II General Specification (Aug. 16, 2005), AM-
Liner Installation Procedure (10/05)
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