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LONDON ROAD TUNNEL, NORTHFLEET, UK (1987 - 1988)
A short road tunnel through Chalk.
Design and testing of temporary and permanent ground anchors.
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STUDLEY NEW TUNNEL, UK (1987 - 1988)
Sewer relief tunnel.
Assessment of anticipated ground conditions along tunnel length. Stability analysis using Rock Mass Classification Systems. Design of Shotcrete and rockbolt support systems (notionally called NATM). Training programs.
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DOVER CASTLE, UK (1989 to present)
Complex, mulit-level tunnel system within Dover's famous Chalk cliffs and immediately underneath Castle.
Design of remedial work in Napoleonic tunnel systems prior to opening to public and during ongoing maintenance. Support systems included shotcrete and rockbolts.
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Recent Tunnel Repairs
Mediaeval Tunnel |
Napoleonic Tunnel |
Wartime Tunnel |
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CEMENTATION MINING LTD - PEN Y CLIP ROAD TUNNEL, UK (1991 - 1992)
One of the tunnels on the A55 North Wales coast road.
Assessment of geological conditions from borehole data. Interpretation of Rock Mass Classification Systems and re-design of support system following a collapse using original system. Supports included rockbolts and fibre reinforced shotcrete.
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East Portal of Pen y Clip Tunnel 
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BRADFORD BECK TUNNELLING SCHEME, UK (1992 - 1993)
Sewer and storm water relief system.
Design of rockbolt and shotcrete support for deep transition excavation. Geotechnical assessment of excavation stability using geotechnical mapping techniques. Prediction of water inflow quantities into the tunnel during excavation.
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NIREX, UK (1992 - 1994)
Design of potential waste disposal facility.
Design of rockbolting and shotcrete support systems in a deep cavern by the use of Rock Mass Classification systems. Examination of tunnel spacing using theoretical analysis. Prediction of blast vibrations from tunnelling and their effect on adjacent excavations. Examination of the effects on the in-situ stress field on the shape and spacing of excavations.
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POINT ACONI PROJECT, CANADA (1992 - 1995)
Planning of site investigation and design of tunnel and shaft linings for undersea cooling water intake system for power station. Including rockbolting, shotcreting and circular tunnel lining design by the use of Rock Mass Classification Systems and theoretical modelling.
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BRADWAY TUNNEL, UK (1997 - 1998)
Active railway tunnel.
Investigation of bulged brickwork lining in a railway tunnel. Design of repair system using ground anchors and replacement of brickwork.
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HALIFAX HARBOUR TUNNEL, CANADA (2000)
Planned waste water collection tunnel system.
Assessment of anticipated ground conditions along tunnel length from borehole data. Stability analysis using Rock Mass Classification Systems. Design of Shotcrete and rockbolt support systems for access shafts and cast in-situ lining for main tunnel drives.
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DRUMMOND MINE, EIRE (2000, 2005, 2007, 2014)
Design of support system for inclined access tunnel to new mine in very weak ground. Techniques included spiling and sprayed concrete.
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