The site is part of a wider area that is to benefit from the improvement or installation of flood defences. We are appointed to undertake a Ground Investigation for a portion of the scheme, adjacent to Rover Way, Cardiff.
The area is recorded to have been significantly influenced by man, with geological mapping recording extensive Made Ground across the site and wider Rover Way area. The Made Ground comprises landfill deposits, ash, slag and beach deposits.
Much of this Made Ground appears to have been used in the construction of historic (and failing) flood defences. The Made Ground is recorded to be underlain by low strength Tidal Flat Deposits and the Mercia Mudstone Group bedrock.
We implemented a scope of works that included trial pits, dynamically sampled and rotary cored boreholes, geophysical surveying, laboratory testing and reporting. The implemented works identified the Conceptual Ground Model to be accurate.
In some areas, extensive slag deposits were identified which prevented progress of any ground investigation. In these areas, we implemented geophysical surveys.
It was necessary to implement the investigation in some challenging conditions, including working within the tidal zone. As such, it was necessary to carefully plan access and egress to exploratory locations around tide times and remove investigation plant from locations during high tide events, returning during low tide.
The full investigation was implemented efficiently and safely, allowing provision of a Ground Investigation Report to the Client and wider Design Team. We continue our involvement with discussions around further investigation works along additional parts of the proposed flood defence network.
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