SUBTECH Delivers Janssen Process Service Truck to Dutch Sewer Rehabilitation Specialist
The Dutch service company Hamers Leidingtechniek B.V. will now and in future bet on the Janssen Process for their no-dig sewer rehabilitation work. This specialized technology was integrated into a custom designed service truck, whose functions are exactly tuned to the high groundwater levels in the Netherlands.
“We tailored our rehabilitation vehicle for Hamers Leidingtechniek B.V. to the last detail in order to meet the needs of this customer,” explains Michael Holterman, SUBTECH managing director. “This is necessary, because sewer rehabilitation in the Netherlands faces different imponderabilities than in other countries, which for example are way above the groundwater table. Even with ‘normal’ rehabilitation work like liner installation or the reconnection of laterals one often encounters the ingress of groundwater.”
This leads to subsequent problems, which Holtermann describes: “Infiltration leads to material removal around the pipe. The resulting voids then promote potential sinkholes.”
Groundwater ingress brings with it an increase in the amount of sand transported into the pipe as well. Another problem is the small size of the Dutch manholes, which makes access quite difficult. But with the SUBTECH vehicle this is not a problem any longer.
“The big advantage of the Janssen Process is the possibility to seal the pipe from the inside even under massive groundwater ingress while at the same time permanently filling the voids around the pipe,” says Holtermann. “This is made possible due to a special two-component resin, which is injected at the repair spot through a packer from in- to outside. It cures within a short period. The technology also enables us to seal the annulus between a liner and the original pipe.”
The new Hamers truck and its equipment are really something to look at: A color tilt-and-pan camera Visonmaster 200 and the cutting robot TITAN 250, which can work in oval pipe profiles and cuts up to 60 cm (2 ft.) into laterals, just to name some of the proprietary SUBTECH Technology along with the equipment for the Janssen Process Point Repair and Lateral Rehabilitation Processes and the Janssen Manhole Repair with lance injection.
The rehabilitation technologies on the truck are complemented by some features, which make work on the truck much more comfortable and safe. For example: There is a battery pack for electrical supplies without a generator. 360° LED lighting gives excellent sight by night. The truck is air- conditioned but has an auxiliary heater as well. There is a small pantry with a refrigerator, a microwave and a sink. A pullout 2-m long metal drawer takes the working robots for storage.
In the future, Leidingtechniek B.V. will not use the technology but also the know-how from the Lower Rhine. The service company and its personnel receive theoretical and practical training and is the official certified to apply the Janssen technologies, point repair as well as the lateral rehabilitation. Managing director and owner Stephan Hamers concluded: This way we are increasing our portfolio and become stronger for the future.
SUBTECH GmbH is located in Goch on the Lower Rhine in Germany and is specialized in the development, design and manufacture of equipment and vehicles for the inspection and rehabilitation of sewer lines. SUBTECH has customers in Europe and the United States.
