Case Study Water Treatment Plant

Case Study 1 : Campbeltown Loch Water Treatment Plant

Diamond Drilling can lead us into working in many weird and wonderful environments.
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However some jobs can be a bit more complicated than others, for example, when Black & Veatch recently appointed GT Diamond Drilling Services to remove a concrete wall from a water treatment plant near the beautiful Campbeltown Loch, You couldn't really envisage it could be a particularly complicated job. However when the wall is in an underground storm tank and the tank itself is under a building with no obvious exit for debris, you start to think it might be a bit of a challenge. Add to this that the storm tank could potentially be flooded requiring a speedy evacuation at any time during the job and that any demolition works must be vibration and fume free, you start to realise that this will take a bit of thought.
The first part of this project required the controlled demolition of a flying chamber area in the upper part of the storm tank. In order for this to be removed, a Top Tec Robotic Demolition unit was lowered down on to the floor of the balcony and through a process of pecking and crushing the Top Tec removed the vast majority of the structure leaving what remained to be cleanly cut away. The main body of the project was the removal of a 1m thick concrete wall. Because of the location and the limited access the wall would have to be cut into manageable sections which then could be transported away from site. It soon became apparent that the most efficient way of doing this was to crane the sections out of the storm tank and up through the roof of the building above. In order to fit between the roof trusses of the building, the sections would need to be no more than 600mm wide and 3.5m high. Even though the storm tank was designed to hold significant volumes of water the job required work to be carried out in a confined space with limited access and due to the threat of flooding all equipment had to be removed at the end of the shift and reinstalled the next day. The 8m long wall was cut using the Hilti TS20 wall saw with Hilti drill rigs, using 3 phase motors. Great care had to be taken that no resulting slurry could enter into the water system which could result in contamination. The project clearly illustrates the advantages of using Diamond Cutting technology over traditional methods, accuracy of cutting, low levels of vibration and minimal debris. It also demonstrates how often in this industry you need to put your thinking cap on when a customer comes to you with a problem for you to solve

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