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Keywords: LOWER CHALK
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Journal Articles
Proceedings of the Institution of Civil Engineers (1979) 67 (2): 255–283.
Published: 01 June 1979
...MP OREILLY; HJ HIGNETT; SG TOUGH; FF ROXBOROUGH; ND PIRRIE TRRL TRANSPORT AND ROAD RESEARCH LABORATORY MOTT HAY AND ANDERSON NEWCASTLE UNIVERSITY NEW SOUTH WAL SIR ROBERT MCALPINE TUNNELLING LOWER CHALK SHIELDS MACHINERY MACHINES ORGANISATION SCALE CONTRACTS COLLECTION...
Journal Articles
Proceedings of the Institution of Civil Engineers (1976) 61 (1): 23–39.
Published: 01 March 1976
... in the Lower Chalk. The final results of the site investigation undertakenby Soil Mechanics Ltd revealed that the chalk is approximately 70% calcium carbonate, has an unconfined compressive strength in the order of 7 MN/m2, an average bulk density of 2.13 Mg/m3 and a moisture content of approximately 16...
Journal Articles
Proceedings of the Institution of Civil Engineers (1962) 21 (3): 611–628.
Published: 01 March 1962
..., that a tunnel could lie in the Lower Chalk right across the Channel. This material was almost perfect for fast tunnelling. On the one hand, it could be bored quite easily by the sort of machine which could bore hardrock, and onthe other hand, it was strong enough to stand unsupported for a considerable time...
