DISCUSSION. TUNNEL UNDER THE SEVERN AND WYE ESTUARIES.

Keywords: TRANSPORT AND ROAD RESEARCH LABORATORY, CENTRAL ELECTRICITY GENERATING BOARD, BUILDING RESEARCH STATIO, TUNNELS, CONDITIONS, CABLES, TREATMENT, TESTS, STRATA, SHAFTS, GAUGES, STRESS, RAILWAYS, TENDERS, ESTUARIES, TUNNELLING, HAULAGE, CONTRACTS, LUGEON, GEOPHYSICAL, MACHINERY, PRESSURE, STRAIN, PROJECTS, SHIFT, GROUND, ELECTRICITY, BULK, GROUTS, ROCKS, SURVEYS, LININGS, DIAPHRAGM, VALUE, SITE INVESTIGATION, SEVERN, WYE, UK