Tunnels

Casecnan Hydro and Transfer Project (Philippines)

Geo-Design acted as specialist support to a project review team. Specialist support included geological characterisation of the volcanic sequence with the aim of recognizing long term durability in the context on an unlined TBM tunnel through complex volcanic rocks.

Posted in Tunnels, Water & Hydropower

Har Nof Highway Tunnel (Israel)

Geo-Design provided investigation, planning and evaluation services for the Har Nof three lane, low cover highway tunnels, located in limestone and marls. Geo-Design undertook full tunnel reference design services, including a major bifurcation cavern.

Posted in Road, Tunnels

Channel Tunnel Rail Link, North Downs Tunnel (UK)

CLIENT :  RAIL LINK ENGINEERING (UK) Geo-Design was involved in a section of the Channel Tunnel Rail Link which comprised a single bore, 3.2km long, 14m span tunnel through chalk rocks. Geo-Design provided specialist input to assist in the design of … Continue reading

Posted in Rail, Tunnels

St Helier – Fort Regent Tunnel Study, Jersey

Investigation and design of a three lane urban highway tunnel under shallow cover in granitic rock for traffic relief in heavily developed area.  Aspects covered included tunnel layout, excavation methodology, lining and ventilation.

Posted in Tunnels, Water & Hydropower

Brighton-Hove Stormwater Project (UK)

Geo-Design undertook an expert assessment of the adequacy of site investigations in terms of scope in relation to the scheme. This comprised: Detailed appraisal of logging and logging procedures Expert reports prepared on the logging and occurrence of marl layers … Continue reading

Posted in Tunnels, Water & Hydropower