Underground structures
As our cities become more congested, and space becomes more valuable, there continue to be innovative uses of our underground space.
These range from uses for transport infrastructure such as deep interchange stations to building basements for optimising developable space in otherwise constrained sites.
We also specialise in cavern, engineering creating large underground spaces in rock formations for energy and infrastructure projects, underground storage facilities and repositories or even deep underground scientific research facilities.
Our services range from early feasibility, through consenting, ground investigation, detailed design of basements, retaining structures and rock support, through to internal fit out and fire management and evacuation, as well as construction support and site supervision.
Our global expertise is internationally recognised, having authored key standards and design guides which are use worldwide to promote best practice, efficient design and the most robust technical solutions.
The owners of Mayfair’s luxurious five-star Claridge’s hotel wanted to enhance the services and capacity offered to their guests but needed more space to do so.
This truly unique project required the designing and building of a deep basement beneath an 80-year-old concrete raft. Adding to the complexity, all materials going in and out of the site had to pass through a window opening, as any other method would involve transporting them through the hotel.
Our structural and geotechnical engineers’ solution involved hand digging small tunnels under the existing ground-bearing raft slab. Circular shafts 1.8m in diameter were hand-dug up to 30m deep under each of the 62 existing building columns. Working in exceptionally tight spaces, the five-storey high reinforced concrete columns were built within the shafts, up to the existing raft’s underside, providing vertical support to the building above. To protect the hotel, real-time monitoring and the facility to jack ground settlements or heave was established at each column location.
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Projects
View all ground engineering and geotechnics projects:
First hillside solar plant in the Philippines
Cayanga Hillside Solar Farm, Philippines
Preserving Brunel’s iconic railway for future generations
Parson's Tunnel Rockfall Shelter, UK
A modern landmark to rejuvenate a traditional industrial area
Commercial development at 98 How Ming Street, Hong Kong
Expanding a hospital in the ‘medical city of Asia’
Island hospital expansion Penang, Malaysia
Ground engineering
As a recognised leader in ground engineering, Arup is often asked to push the essential skill and science of designing and building in the ground. Wherever difficult ground conditions, sensitive environments or ambitious projects present geotechnical challenges, we are able to help.