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