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 Glass Rein<strong>for</strong>ced Thermoplastic Liner/Therm<strong>of</strong>ormed<br />
inserted into the thermoplastic composite sock. The pig heats the polypropylene<br />
until it melts. An inversion drum deploys a silicone rubber inflation tube which<br />
pushes the pig through the pipe. Application rate is 0.5 m/min. The inversion bag<br />
also presses the molten thermoplastic composite sock against the pipe wall where<br />
it cools to <strong>for</strong>m a solid homogeneous thermoplastic composite liner. Pressure in<br />
the inversion bag is kept at 45 psi (3 bar). The inversion bag is deflated and<br />
removed after the liner cools.<br />
QA/QC After installation, CCTV inspection should be per<strong>for</strong>med on the liner. The<br />
internal surface is to be smooth, clean and free from scoring, cavities, wrinkling,<br />
and other surface defects. Samples <strong>of</strong> the <strong>for</strong>med liner should be checked <strong>for</strong><br />
thickness, short-term flexural modulus and tensile strength, but as yet no design<br />
values have been provided.<br />
IV. Operation and <strong>Main</strong>tenance Requirements<br />
O&M Needs None identified yet.<br />
Repair Requirements<br />
<strong>for</strong> Rehabilitated<br />
Sections<br />
Remove host pipe and Aqualiner. Replace with new pipe section and tie back to<br />
existing host pipe with repair clamps.<br />
V. Costs<br />
Key Cost Factors • Mobilization – one fully equipped installation truck, compressor and<br />
generator.<br />
• Pipe cleaning as <strong>for</strong> close fit lining.<br />
• Principal costs include liner tube, installation labor, crew size (3-4), and<br />
power usage.<br />
• Service lateral reinstatement by open cut or remote robotics as per close fit<br />
lining.<br />
Case Study Costs Estimated Cost ~ $35-$40/feet<br />
VI. Data Sources<br />
References Aqualiner Product Specification Issue 3 (Aug. 12, 2007)<br />
A-67