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Professor Robert N Pryor vi The Lewes road tunnel Sussex England
Ground behaviour and support for mining and Longterm performance of a machinebored tunnel
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access tunnel advance ANFO behaviour blasthole Bolmen bolts boreholes bunker chamber clay coal compressive strength concrete lining construction contract Contractor conveyor cost cracks cross-section cut and cover cutter deformation depth diameter Dinorwic drainage drift drill and blast drivage drive effect engineering equipment excavation extensometers fractured freezing geological geotechnical ground conditions groundwater grouting head holes horizontal hydraulic in-situ increase initial injection installed investigation joints Kielder length limestone load located main tunnel maximum measurements mechanical method metre mining mudstone National Coal Board open-cut permeability Permian pilot tunnel pipes portal prediction pressure problems rockbolts roof sand sandstone Seelisberg tunnel segments settlement trough shaft shield Shirebrook shotcrete shown in Fig site investigation soil stability steel arches strata stress surface tests thickness tunnel boring tunnel boring machine tunnel face tunnel lining tunnelling machine underground values ventilation vertical Wyresdale zone