Location:
Tunnel Network, Gibraltar
Client:
Mitie Defence Ltd
Architect:
n/a
Value:
TBC
Completed:
Ongoing
Services:
Geological Engineering Services, Geotechnical Engineering Services
The tunnels of Gibraltar were constructed over the course of nearly 200 years, principally by the British Army, and extend approximately 34 miles (55 km) within the Rock, almost twice the length of Gibraltar’s entire road network. The first tunnels, excavated in the late 18thcentury, served as communication passages between artillery positions and housed guns within embrasures. More tunnels were constructed in the 19thcenturyto allow easier access to remote areas of Gibraltar and accommodate stores and reservoirs to deliver the water supply of Gibraltar. The 20thcenturysaw by far the greatest extent of tunnelling when the Rock was turned into a huge underground fortress capable of accommodating 16,000 men along with all the supplies, ammunition and equipment needed to withstand a prolonged siege. Tunnelling finally ceased in 1968, and since then, have been managed by the Government of Gibraltar and the Ministry of Defence.
In order to ensure continued safe access to the tunnel network, not only for tourism, but also, for military training, mandated statutory inspections are required to assess the stability and current condition of the tunnels, based on the geological and geotechnical characteristics of the rock mass in which they have been excavated. Our assessment of the network of tunnels was undertaken over a 4-month period, and identified areas requiring further geotechnical remediation and intervention, including mesh; rock bolting; rock anchors, and other remedial works.
Through extensive expertise in engineering design, NOSA has built a reputation for delivering innovative, reliable, and efficient designs that offer sustainable, value-for-money solutions. Ready to bring your project to life? Contact us today to discuss how we can make it happen.
