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Retaining Structures and Deep Basements

Photo: Donaldson Assoicates

COWI UK Limited is well equipped to support our clients through all phases of a project, from planning to construction, whether working independently, as part of a multi-disciplinary team, risk management, or as a design and construct team.

Our skill sets and experience allow the identification of risk at an early stage, ensuring clear and timely communication with the client, and all members of the project team.

Deep basements

Basements are often driven by the search for additional space, whether in residential or commercial development.  Many developments to residential properties include the construction of a basement beneath the existing structure. This leads to obvious challenges in both the temporary and permanent states. Design of the permanent works needs to consider the altered load paths through the existing structure as well as the ground loading, water control and ground movements. These may affect both the building in question as well as local structures. Similarly the construction sequence and temporary works design must take account of the challenge of access, the change of load paths and ensure the integrity of all buildings.

When basements are required for larger developments, the requirements are the same – a safe, waterproof space needs to be built without causing harm to the surrounding environment or structures.

Seismic experience

Our team has experience in designing deep basements in seismic areas, protecting from water ingress with diaphragm walls and working to local construction procedures in the UK, Europe, Middle and Far East.  We have the capability to conduct sophisticated analysis, including 3D FEA; but we select the most appropriate approach in order to bring value to our clients.

Unique expertise

We have developed our own spreadsheets to calculate settlements caused by tunnelling in accordance with New and O’Reilly, “ Tunnelling Induced Ground Movements; Predicting their magnitude and effects”, Fourth International Conference on Ground Movements and Structures.

LAST UPDATED: 22.12.2016