2005 0928 ca

2005-0928CA.ppt

technical archives

www.trictrenchless.com

TRIC Training Log: 09-28-2005

Client: Andes Construction, Oakland, CA

Job: Pipe burst municipal main, pulling into manhole

Pull: 115’ / upstream / 8” SDR17 / bursting 8” VCP

2005-0928CA.ppt

technical archives


We at TRIC Tools have specific requirements for the use and maintenance of our equipment with regard to safety and efficiency on the job. Our written and verbal recommendations coincide with safety regulations set by local, state, and national government agencies. Our

clients may have standards over and above industry regulations. However, the safety equipment, apparel, and operating procedures

demonstrated by our clients in this presentation may or may not comply with above mentioned government regulations.

2005-0928CA.ppt

technical archives


The tool: TRIC model WC22 ram prototype, 19.24 square inch total piston area, developing 48 tons of force at 5,000 psi. (Hydraulic pump used for this job was a Ditch Witch Power 25, producing a maximum of 2,500 psi.)

2005-0928CA.ppt

technical archives


The task: Replace 115’ of 8” VCP, pulling into 7’ deep manhole with 48” base. Flow exits manhole to right; pull will be upstream through that port. Note wide flow channels.

2005-0928CA.ppt

technical archives


Consultation: Ward Carter discusses the pull with Andes Construction staff.

2005-0928CA.ppt

technical archives


Setup: Three 6” x 6” timbers are used. The first (under the one visible) is shorter and set into the floor of the manhole. Cuts are made with a concrete saw to fit the first wood piece flush with floor level and perpendicular to the pipeline to be replaced. Blue arrow shows direction of pull.

2005-0928CA.ppt

technical archives


Resistance: The second and third timbers are cut as precisely as possible to wedge against the walls of the manhole. Wood spacers thick enough to allow passage of the cable are placed between

the first and second timbers. Note abandoned cut in floor to the right of the pulley wheel.

2005-0928CA.ppt

technical archives


The ram is lowered into the manhole.

2005-0928CA.ppt

technical archives


Loaded: Ram fits as closely as possible to opposite wall of manhole, to allow maximum room for bursting head to enter. The slight mounting angle off the pulley base keeps ram away from sloping walls.

2005-0928CA.ppt

technical archives


Taking aim: A back hoe assists entry of new pipe, and keeps it above traffic by laying it over top of crew truck. Note 8” bursting head in gutter, already attached to cable.

2005-0928CA.ppt

technical archives


Guided entry: The TRIC large diameter bursting head system allows the mole to slide freely on the cable, which is attached to the head driver and PE driver independently of the mole. Here the mole is

manipulated with a digging bar as pull begins and drivers slide into place before entry.

2005-0928CA.ppt

technical archives


Contact: Entry is smooth, pulling upstream into running main.

2005-0928CA.ppt

technical archives


Arrival: Mole slides off drivers easily, and is hauled out of the manhole with a rope. Outlet at base of manhole was enlarged to make room for head to pass through.

2005-0928CA.ppt

technical archives


Freedom at hand: After removing the mole, the ram is set up again to pull without it, allowing greatest possible penetration of pipe into manhole.

2005-0928CA.ppt

technical archives


Hoist away: Clearing the manhole of pulling equipment.

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The cut: Drivers, PE cap, and new (grey) pipe enter manhole with room to spare.

2005-0928CA.ppt

technical archives


Cleanup: Head and pipe drivers are pulled out…

2005-0928CA.ppt

technical archives


…and equipment is cleared away from an undamaged driveway.

2005 0928 ca

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