EPOXY PATCH REPAIRS
Wilkinson Environmental Ltd’s patch repair system is designed to achieve a point repair without the need to reline the full length of a sewer.
A fibreglass matting is impregnated with an epoxy resin, which is then secured around an inflatable flow-through packer and allows the sewer to continue operating without the need for over-pumping. The packer is pulled into place and inflated to cover the defective area. A choice of 600mm and 1000mm patches can be used to repair defects.
This method offers a cheap and efficient system of repair and can be installed in pipe work from 100mm to 900mm.
Suitable applications for epoxy patch repairs:
• Spot repairs on foul and storm drainage systems, including all private, S24 and main sewers
• Prevent root growth on single joints after root cutting
• Sealing leaking joints, preventing infiltration and ex-filtration of sewers
• Repair damaged sections of sewer lines bringing a grade 5 sewer back to grade 1
• To cap off redundant or root filled connections and junctions
• To repair defects within diameter changes
PITCH FIBRE RE-ROUNDING
Wilkinson Environmental Ltd has developed a system for re-rounding deformed pitch-fibre pipes, enabling them to be re-lined.
This system works using two five tonne winches, which pull a specially designed re-round tool through the deformed section of pipe work and forces the pitch fibre pipe to reform and remove any blistering and deformity.
This is carried out three times and then the pipe is flushed out with clean water to remove any debris. A structural CIP (Cured in Place) liner is then installed to prevent the deformity and blistering returning.
This is a beneficial system as there is no need to remove existing manholes and the pipeline can be restored to its original shape without the disruption of a costly excavation.
DIRECTIONAL WATER CUTTING
Cutting concrete out of sewers has become our specialty. Wilkinson Environmental Ltd has one of the only single entry directional water cutters in the county, capable of cutting through the most stubborn obstructions.
The directional water cutter uses 40,000psi at 80Lpm through a single pencil nozzle, delivering astonishing cutting power. The single entry unit can be driven down to any obstruction and the unit will easily cut through large tap roots and root mass, which normal mechanical cutters cannot remove.
It can also handle intruding connections and cut through heavy deposits of concrete up to 50 N/mm2 strong in any size pipe work, from 100mm to 1000mm. It is also capable of dealing with up to 40% deformities in sewer lines, which sets it aside from most other cutting units.
CONCRETE AND GROUT CUTTING
For many years removing concrete and grout from 4” or 6” sewer pipes has always been incredibly difficult, especially if it’s 50NM, which has leaked in from house footings or piles.
Usually the first method to remove concrete is by using a high-pressure directional water cutter (12,500psi) with standard rear-facing jets, which are generally used for cleaning normal sewer debris. This gives forward thrust to propel the jet and hose forward to the sewer obstruction in the assumption the jet will sit on top of the concrete and cut through it.
As the concrete obstruction get thicker this stops working and the jet gets closer to the sidewalls of the pipe work. Eventually, the sewer cleaning contractor and client find themselves in a difficult situation and discover there is no more pipe work left, only the immovable concrete. This method also fails if the concrete is over 80%.
The second approach, undertaken by more experienced concrete cutting engineers is to attach a forward facing jet/pencil nozzle on to rods and attempt to cut the concrete out. However, this method is also floored as the forward facing jet creates so much thrust it forces the jet out of the sewer and away from the obstruction.
Using innovative, no-dig technology, Wilkinson Environmental, the Midlands based sewer cleaning specialists, have successfully developed a directional water cutter that counter reacts the force of the forward facing jet and is capable of working up to 40,000psi. This concrete cutter will remove the hardest of concretes and grouts. Our ‘tried and tested’ directional water cutter has already successfully dealt with a large hole in an existing pipe, as well as fractures and displaced plastic pipe work without damaging the sidewalls of the pipe work.