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Trenchless Repairing-Reinforcing Process of Underground Pipes with Advanced Composite Materials  

진우석 (한국과학기술원 기계공학과)
권재욱 (한국과학기술원 기계공학과)
이대길 (한국과학기술원 기계공학과)
유애권 ((주) TBI)
Publication Information
Composites Research / v.15, no.1, 2002 , pp. 21-31 More about this Journal
Abstract
To overcome the disadvantages of conventional excavation technology various trenchless (or excavation free, or no-dig) repair-reinforcement technologies have been developed and tried. But trenchless technologies so far developed have some drawbacks such as high cost and inconvenience of operation. In this study, a repairing-reinforcing process for underground pipes with glass fiber fabric polymer composites using VARTM (Vacuum Assisted Resin Transfer Molding) has been developed. The developed process requires shorter operation time and lower cost with smaller and simpler operating equipments than those of the conventional trenchless technologies. For the reliable operation of the developed method, a simple method to apply pressure and vacuum to the reinforcement was devised and flexible mold technology was tried. Also, resin filling and cure status during RTM process were monitored with a commercial dielectrometry cure monitoring system, LACOMCURE. From the investigation, it has been found that the developed repairing-reinforcing technology with appropriate process variables and on-line cure monitoring has many advantages over conventional methods.
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