ACS were contracted to excavate and install a multi service trench within the live military base of Beacon Barracks in Stafford.
Approximately 5000 metres of multi service trench and associated secure draw pits and 8000 metres of electrical trench and the erection of over 200 lighting columns.
The trench width was up to 2800 wide and 2 metres deep in sections and consisted of secure communication ducts, welfare ducts, H/V and L/V cables, gas and water services.
All services routes had to be approved and coordinated prior to commencement due to live environment and everyday workings of a live army Barracks. One of the challenges ACS had to overcome on the live base was the fact that there were over 350 number live services throughout the agreed new route and all known services had to be located by trial holes which then allowed the multi utility trench design to comply with SCIDA regulations.
The service route also includes the installation of large pre cast culverts and large diameter pipe work to divert the numerous watercourse crossings along the route, all of these works required co-ordination with the MOD and the environmental agencies.In addition to these works were a number of road and car park crossings for the new route where ACS provided all traffic management to keep all traffic routes flowing whilst the works progressed throughout the barracks.
ACS had 8 gangs working concurrently on the project to deliver the infrastructure necessary to allow the 28 buildings to be handed over in line with the requirements of the MOD.
Various construction methods and plant items were utilised inc. the Vac-ex, 36t machines, rubber tired and 6t mini excavators to achieve the handover dates. Detailed construction service drawings have been reviewed and produced to allow the combined service trench to be installed in and around both chartered and unchartered services.
The most challenging issue on this project were the risks involved due to unknown services and poor records at the barracks. ACS solved these issues without problems and with exemplary management.