Public Sewer Services has invested heavily in the latest technology which enables us to offer trenchless solutions on collapsed sewers and pipelines, leaks, displaced and offset joints, failed pitch fibre pipes, upsizing of pipes and works that are difficult to access and excavate. In many cases we can avoid digging up roads, gardens and driveways. The benefits are a less disruptive, more environmentally friendly, faster and more economical solution for the customer.
Trenchless Solutions
Since 1990, Public Sewer Services have had the technology and expertise to carry out trenchless solutions on collapsed sewers and pipelines, leaking sewers and displaced and offset joints, failed pitch fibre pipes, upsizing of pipes and works to pipelines that are difficult to access and excavate. In many cases we can avoid digging up roads, driveways and gardens. This means minimal disruption, better for the environment, a faster turnaround time and a reduction in costs. Services we offer include:
Pipe Bursting
We operate a wide range of pipe bursting rigs including static rod pulling and metal cable pulling rigs. Our team are trained by TWI in plastic welding for butt fusion joints and electro fusion. Pipe bursting is also the only trenchless solution to installing a larger diameter pipe than the host pipe, known as “Upsizing”. This method uses hydraulic rams to pull a new pipe through an existing pipeline, bursting the host pipe outwards and into the surrounding ground.
CIPP Lining
A resin saturated liner is installed by inversion or by winching into place, then air or water is used to force the liner out to the walls of the host pipe. Curing methods include an ambient cured process, hot water, steam or UV to cure the liner. The result is a new pipe inside the old pipe, less friction giving an increased flow rate and a sealed pipe to stop infiltration and exfiltration.
Brawoliner
A resin saturated liner is installed by inversion or by winching into place, then air or water is used to force the liner out to the walls of the host pipe. Curing methods include an ambient cured process, hot water, steam or UV to cure the liner. The result is a new pipe inside the old pipe, less friction giving an increased flow rate and a sealed pipe to stop infiltration and exfiltration.
Guided Auger Boring
A guided auger boring system is one which has a guidance system. One type of guided auger boring system uses an actuator sited in the driveshaft. The driveshaft turns a casing and steers the isometric cutting head to follow the design pathway.
Another type of guided auger boring system uses steering rods – one end is on the casing, the other in the drive pit to push the casing in the direction of the design pathway.
Auger Boring
Auger boring is defined as a trenchless application in which a casing pipe is jacked into the earth’s surface while simultaneously rotating helical augers remove the excavated spoil.
Horizontal Directional Drilling
Horizontal directional drilling (HDD) is a trenchless construction method used to install pipes underground without disturbing the ground surface. The drill is launched from one end of the designed bore path and retrieved at the other end, and except for the launch and retrieving spaces above ground, the entire process takes place underground, out of sight.
Impact Moling
Impact moling is a method used for the installation of small diameter pipes or cables using a pneumatic hammering tool. It is the simplest form of trenchless installation of pipelines for water, sewer, and gas under roads, sidewalks, embankments and other small crossings less than 150 feet. Impact moling is easy to operate, is low cost, and requires little to no excavation for the connection and termination pits.
Pitch Fibre Re-Rounding
Pitch fibre pipes are made from layers of wood pulp and pitch pressed together with bitumen. This pipe is susceptible to deformation and blistering which is a major cause of household blockages. We use a specialist re-rounding tool mechanically drawn through the pipe and once the pipe is round we then install a CIPP liner to prevent any further deformation, increase flow rate and supply structural strength.
UV Lining
UV lining process is the fastest and most cost-effective way to repair a collapse or damaged pipe. Unlike most CIPP liners, the UV system is cured by ultra-violet light rather than hot water. Not only does this allow much quicker installation and curing, but it also avoids any risk of pollution from the disposal of contaminated water.
The process involves inserting a Glass Reinforce Polyester (GRP) liner impregnated with a special resin into the sewer or drain. As the liner is inserted into the pipe, it is pulled into place and then inflated with free air. A UV Light Train with built in CCTV is pulled through to check the positioning and identify any obstructions. The UV lights are then ignited, causing the resin cure and effectively creating a new pipe within the pipe and restoring the integrity of the drain or sewer.
