Scanning

The London office of D-Drill, which has branches across the UK, was called in by the main contractor to remove a section of reinforced capping beam that was 10m x 1m x 550mm at a siding near Kensal Green to allow for the erection of a new gantry.

However, the capping beam covered metal sheet piles and, therefore, it was imperative that no damage was done to them. It was crucial that there was little or no vibration and that the team knew the location of the sheet piles before they started the work.

As well as expertise in diamond drilling and concrete sawing, D-Drill also offers a scanning service and the team used the D-Scan 3D concrete scanning equipment to locate the sheet piles within the capping beam.

D-Scan provides a full pictorial analysis of steel reinforcement within concrete structures to avoid concealed objects, rebar and services when drilling or sawing. The concrete scanning and imaging service can be used on a variety of applications including floors, slabs and balconies as well as in structures such as bridges, tunnels and buildings.

Once the scanner had located the sheet piles it gave the team a guide and meant they could begin the process of cutting into the concrete without risking damage to them.

The D-Drill team track-sawed two cuts along the beam each side of the sheet piles leaving 10mm of concrete covering and reduce the width of the beam leaving the concrete encased sheet piles exposed.

D-Drill was then able to cut the remaining concrete from the piles using a combination of ring sawing and diamond drilling to follow the profile of the piles and allow the main contractor to lift out the remaining concrete using a lifting eye to leave the sheet piles exposed.  

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