Line detections in 2015
In 2015, we have completed some 90 projects, some of them involving line detection. Here you find a description of some of these projects.
Detection of utility lines on Decathlon construction site
AT Osborne asked Bom-Be to map out the utility lines in the run-up to the construction of a new Decathlon in Froyennes. KLIP plans(of the Belgian Cables and Pipeline Information Portal) had shown that some of the underground lines were situated dangerously close to the construction zone. This was the case for a high voltage line, gas line, telephone line and water pipes, so AT Osborne wanted to know their position in detail. While studying the plans, we had to take into account that previously a Quick hamburger restaurant had been demolished on this site. Using our radio detection set, we were able to verify the course of the high voltage, gas and telephone lines as well as an unknown line, which didn't show in the plans. This method didn’t allow for the detection of the water pipeline, since it was made out of plastic.
Survey at the Thiepval War Memorial
Subterra Consult is currently drawing up the management plan for the Common Wealth War Grave in Thiepval France, which is also home to the Thiepval Memorial. This is one of the most important French war monuments, commemorating 72 191 missing British and South African soldiers from WWI. In order to draw op the plan, Subterra wanted to know the position of different utility lines, and if ammunition from World War I was present. Therefore, Bom-be performed a combined survey of the area, with GPR and with a multisensor magnetometer. This allowed us to map out the location of the utility lines, as well as possible suspect objects. This information was the basis for our advice concerning the upcoming management operations.
Geophysical surveys for ERM
In view of drilling and excavation works, ERM charged Bom-Be with the geophysical surveying of two sites, in Ghent and in Tessenderlo. The aim was to map out underground structures, such as utility lines and storage tanks. In Ghent we only used GPR to determine the position of cables and pipe lines, in Tessenderlo we used a combination of GPR and metal detectors to check the available plans for the exact position of the utility lines. The position of correctly drawn lines was confirmed, and we also mapped out the lines that didn’t correspond to or didn’t show on the map.