Methodology
Ventilation and odor control used:
Fresh air pumped into pipe at upstream manhole, and suction fan at downstream manhole to provide adequate ventilation during the work periodsrow.
Rehab method used:
Danby Panel Lok with full annulus grouting with cementitious grout with minimum compressive strength of 5000 psi. Panel Lok flat panels arched from “J” strip anchors at invert corners. No lining of invert. Section under railroad track had 4” of grout and steel rebar designed by District’s structural engineers.
Cleaning method used (if required) and who cleaned the line:
High pressure (10,000 psi) water blasting performed by the Danby licensee (Sancon Technlogies, Inc.).
Method of flow bypass or diversion, if used:
None. Pipe was out of service.
Hurdles
Problems encountered during construction:
None. Transitions into and out of the thicker grout wall section, as well as from semi-elliptical pipe into circular 60” pipe slowed normal productivity. Danby and licensee sought and received permission to change grout mix design to lower heat of hydration in thicker section.
Problems encountered after construction:
None
