Gilgel Gibe II, Ethiopia

CLIENT:   EEPCO (Ethiopian Electric Power Company) The Gilgel Gibe II Power Station is a hydroelectric power station located on the Omo River, Ethiopia, in the East African Rift Valley. The excavation of the 26km TBM-excavated headrace tunnel experienced very challenging ground … Continue reading

Posted in Tunnels, Water & Hydropower

Dublin Metro North (Ireland)

CLIENT:  PARSONS BRINKERHOFF AND JACOBS O’Connel Street Stop – UDEC Assessment – Dublin, Ireland Geo-Design undertook a feasibility review of a station cavern in a weak sedimentary rock mass, located beneath heavily loaded bridge foundations. The review required a detailed … Continue reading

Posted in Rail, Tunnels

Gerrards Cross Tunnel Collapse (UK)

CLIENT :  TESCO STORES LTD – BLP Gerrards Cross Tunnel is a 310m long railway tunnel in Gerrards Cross, Buckinghamshire, on the Chiltern Main Line. The purpose of the tunnel was to enable a new Tesco supermarket to be built over … Continue reading

Posted in Rail, Tunnels

Dublin Port Tunnel Cross Over Caverns (Ireland)

CLIENT:  NMI-JV – HASWELL CONSULTING ENGINEERS The Dublin Port Tunnel is a twin bore roadway tunnel (4.5km in length and height clearance of 4.65m) that forms part of the M50 motorway around Dublin city, which began construction in 2001 and was … Continue reading

Posted in Caverns and Underground Mines, Road, Tunnels

Bakun Hydro Project (Philippines)

Geo-Design provided specialist support to the team reviewing the pressure tunnel lining design. This involved a detailed assessment of the ground conditions, with special reference to variability in stiffness of the metasediment geological sequence, to assist with evaluation of the … Continue reading

Posted in Tunnels, Water & Hydropower