Davey Civils provides a full package of shaft sinking, pipe jacking and solutions across the UK.

We also have extensive experience in the more traditional methods of hand excavated tunnelling in the form of timber headings.

Segmental Shafts

Segmental shafts vary in size from 1.52m up to 25m diameter and to depths up to around 50m. They are constructed using either underpinning or caisson techniques and can be jacked into position where necessary.

Segmental shafts are installed for a variety of uses including: Jacking and reception pits for tunnels, storage tanks, pumping stations and manholes.

Deep Excavations

Davey Civils specialise in deep excavations and trench excavation work. With our large fleet of excavators, coupled with the expertise of our personnel, we are able to cope with the deepest and largest of excavations.

Deep excavations secured using cofferdams provide safe working environments in most types of ground conditions, to allow the construction and installation of structures and tanks.

Traditional Tunnelling

Davey Civils have extensive experience in both modern and traditional methods of tunnelling. Timber Headings are being used less and less but in some cases where access is a problem then they are the only answer. They are constructed using a man made timber frame to support the hand excavated tunnel.

Once the pipe work or ducting has been installed within the heading then the remaining void is usually filled in using either grout or concrete. They can be installed in a variety of different strata ranging from dewatered sand to rock.