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rehabilitation services

lining

our crew on a lining job

McCann’s Underground, Inc. has been on the cutting edge of trenchless pipe repair and rehabilitation for many years. Lining, also known as the cured in place pipe (CIPP) approach, involves no digging as can be seen in the photo at right. Lining helps to restore stability to damaged pipe with neither the hassle nor the time consumption of road demolition that accompanies more disruptive methods. Pipe ranging in size from 2" to 72" can be repaired using this technique.

our Illinois facility where the liner is prepared

The process begins at the CIPP "wet-out" facility in northern Illinois. Here the lining felt is saturated in resin and put into a long sock like the one seen at left. The picture shows the sock containing the lining material being rolled up for transport. For every lining job we do, the lining material is prepared and cut according to length ahead of time at this facility instead of at the job site. This helps to reduce on-site time billed to the customer, so that each job is done as efficiently as possible.

At the job site, the felt is pulled or inverted into place and serves as a patch over broken portions of existing pipe. For very long sections of pipe that need repair, McCann’s Underground, Inc. specializes in lining from one manhole to another manhole.

CIPP boiler truck

The inversion process works by first securing the resin saturated felt at one manhole. Air or water is then pumped into the bladder which pushes it through the pipeline, turning inside-out as it goes. The boiler truck at right is pumping hot water into the tube containing the lining material.

felt lining inverting to fill the pipe

The process of turning inside-out causes the lining felt to be applied to the pipe. The photograph at left shows the inverting process from inside the sewer.

Once in position, the repair bonds tightly to the inside of the existing sewer, covering any cracks or breaks in the line and is then cured in place. Repairing sewer in this fashion is ideal for boosting the structural integrity of the pipe. Offset joints, sags in the line, pipe deterioration and other problems are often completely eliminated with this cutting edge process. What results in only a few hours is an enduring and cost-effective solution over other rehabilitation methods.

grouting

Sealing mainline sewer and service laterals from groundwater infiltration is vital to reducing flow levels, thus lessening the burden on nearby water treatment plants. McCann’s Underground, Inc. uses chemical grouting compounds that are pushed through cracks, joints and surrounding ground where they solidify into a watertight seal. This will hold its position unless disturbed or left in sunlight for extended periods of time. An increase in ground water pressures is nothing to fear since it will only press the seal even more closely to the pipe.

grout packer moving into position

Seams between two sections of pipe, like the one shown at right, are easily sealed using a piece of equipment we call a grout packer.

grout packer inflating with grout and air

The grout packer is essentially a bladder made from a porous material. The grout packer is pulled into place so that it covers the seam or crack. The bladder expands as it is filled with the grouting compund as shown in the photo. As the pressure within the grout packer increases, the grout is forced out through the pores in the bladder.

grout packer is moved back and deflated leaving the crack filled

Once enough grouting compound has been pushed into the seam, the bladder is deflated and pulled away. The photograph shows the now water-tight seam. To complete the process, the excess grouting compound seen in this picture will be washed away and removed from the pipeline.

grout packer being positioned to seal a service connection

Conveniently, the grouting process also works quickly and effectively to seal the junction between the sewer mainline and service connections. The grout packer in this picture will be pulled into place to cover the service connection and seal the leaks in a manner similar to that described above.

McCanns Underground 611 North Burr Oak Ave Oregon WI 53575