Davey Civils design and install bespoke trench sheet cofferdams both cantilever or propped, utilising fabricated steel or hydraulic framing. The design process considers the load cases involved in the construction and dismantling of the cofferdam. From this, we are able to calculate the minimum Sheet penetrations, bending moments and shear forces to determine the safest and most cost effective solutions. We commonly install systems for:

• Underground water attenuation systems
• Pumping Stations
• Basements
• Interceptors
• Pipe installations

Launching / reception shafts

As a vital part of tunnelling and various ‘no dig’ techniques, trench sheeting is an ideal method of construction for both launch and reception pit excavations. Replacement of the lower bracing frames with a concrete base not only provides a perfect working platform but also provides the required headroom to operate different types of tunnelling equipment for Thrust & Auger Bores.