none 10.1144/GSL.1986.002.01.53 Geological Society of London Geological Society of London 1881 32637430 65090 2024072301353600367 10.1144 2024-07-23T10:54:03Z 2008-04-30T20:36:58Z 12 Geological Society, London, Engineering Geology Special Publications EGSP 0267-9914 2041-4730 05 16 2007 01 1986 2 1 R. P. Martin S. R. Hencher Abstract There is a clear need for separate descriptive schemes for the degree of weathering at a small scale (material grades) and at a large scale (mass zones). Such weathering classifications should be established according to clear principles using well defined terminology. The schemes recommended in BS 5930 for this purpose are considered inadequate due to confusing terminology, loosely defined material grades and unjustified mass zonal boundaries. In this paper, published schemes both at the material grade scale and the mass zonal scale are reviewed and proposals made for standardised terminology. Examples of three schemes for classifying materials, and which meet many of the criteria advocated here, are presented. An idealised zonal scheme for heterogeneous weathered rocks is presented and the engineering significance of each proposed zone boundary is discussed. 01 1986 01 1986 299 308 10.1144/GSL.1986.002.01.53 https://doi.org/10.15223/policy-002 10.1144/GSL.1986.002.01.53 https://www.lyellcollection.org/doi/10.1144/GSL.1986.002.01.53 https://www.lyellcollection.org/doi/pdf/10.1144/GSL.1986.002.01.53 https://pubs.geoscienceworld.org/UrlRedirectHandler.ashx?routename=books&chapterdoi=10.1144/GSL.1986.002.01.53&request=chapter 10.1144/GSL.QJEG.1970.003.01.01 Q. Jl. Engng. Geol Anon 295 5 1972 The preparation of maps and plans in terms of engineering geology Anon The preparation of maps and plans in terms of engineering geology Q. Jl. Engng. Geol 1972 5 295 382 Geological Society Engineering Group Working Party 10.1144/GSL.QJEG.1977.010.04.01 10.1016/0148-9062(78)91472-9 10.1007/BF02600503 10.1007/BF02595273 Int. J. Rock Mech. Min. Sci Anon 85 18 1981 Basic geotechnical description of rock masses Anon Basic geotechnical description of rock masses Int. J. Rock Mech. Min. Sci 1981 18 85 110 ISRM Commission on classification of rocks and rock masses Proc. 7th Int. Conf. Soil Mech. Found. Engng. Barata F. E. 507 1969 Barata F. E. Landslides in the tropical region of Rio De Janeiro 1969 II Proc. 7th Int. Conf. Soil Mech. Found. Engng. Mexico 507 516 British Standards Institution BS 5930:1981. Code of Practice for Site Investigations 1981 London British Standards Institution 147 pp 10.1680/geot.1969.19.3.321 10.1007/BF02635301 Bull. Int. Assoc. Engng. Geol Dearman W. R. 123 13 1976 Weathering classification in the characterisation of rock: a revision Dearman W. R. Weathering classification in the characterisation of rock: a revision Bull. Int. Assoc. Engng. Geol 1976 13 123 127 Proc. 3rd Int. Cong. Int. Assoc. Engng. Geol. Dearman W. R. 119 1978 Dearman W. R., Irfan T. Y. Classification and index properties of weathered coarse-grained granites from South-West England 1978 II Proc. 3rd Int. Cong. Int. Assoc. Engng. Geol. Madrid 2 119 130 10.1016/0013-7952(78)90018-2 Proc. 4th Pan. Am. Conf. Soil Mech. Found. Engng. Deere D. U. 87 1971 Deere D. U., Patton F. D. Slope stability in residual soils 1971 I Proc. 4th Pan. Am. Conf. Soil Mech. Found. Engng. Puerto Rico 87 170 Proc. 7th European Conf. Soil Mech. Found. Engng. Donaghe R. T. 29 2 1979 Donaghe R. T., Torrey V. H. Scalping and replacement effects on strength parameters of earth-rock mixtures 1979 2 Proc. 7th European Conf. Soil Mech. Found. Engng. Brighton 29 34 Design Parameters in Geotechnical Engineering Proc. Conf. In Situ Investigations in Soils and Rocks Fookes P. G. 53 1970 Fookes P. G., Horswill P. Discussion on engineering grade zones 1970 Proc. Conf. In Situ Investigations in Soils and Rocks London 53 57 10.1144/GSL.QJEG.1971.004.03.01 Geotechnical Control Office Geotechnical Manual for Slopes 1979 227 pp Hong Kong Government Printer Government of Hong Kong Building (Construction) Regulations. Laws of Hong Kong Chapter 123 (part) Table IX 1976 Hong Kong Government Printer Proc. 7th Southeast Asian Geot. Conf. Hencher S. R. 125 1982 Hencher S. R., Martin R. P. The description and classification of weathered rocks in Hong Kong for engineering purposes 1982 I Proc. 7th Southeast Asian Geot. Conf. Hong Kong 125 142 Proc. 5th Int. Conf. Soil Mech. Found. Engng. Holtz W. G. 143 1961 Holtz W. G., Ellis W. Triaxial shear tests on clayey gravelly soils 1961 I Proc. 5th Int. Conf. Soil Mech. Found. Engng. Paris 143 149 10.1007/BF02634696 Proc. 7th Southeast Asian Geot. Conf. Knill J. L. 159 1982 Knill J. L. Moderator's report on engineering geology and rock mechanics 1982 II Proc. 7th Southeast Asian Geot. Conf. Hong Kong 159 165 10.1680/geot.1965.15.1.94 Bull. Assoc. Engng. Geologists Krank K. D. 173 1983 Geotechnical properties of weathered Sierra Nevada granodiorite Krank K. D., Watters R. J. Geotechnical properties of weathered Sierra Nevada granodiorite Bull. Assoc. Engng. Geologists 1983 XX 173 184 Proc. 7th Int. Conf Soil Mech. Found. Engng. Little A. L. 1 1969 Little A. L. The engineering classification of residual tropical soils 1969 I Proc. 7th Int. Conf Soil Mech. Found. Engng. Mexico 1 10 10.1144/GSL.QJEG.1972.005.01.05 10.1016/0013-7952(83)90027-3 10.1086/627112 J. Inst. Engrs., Australia Moye D. G. 281 27 1955 Engineering geology for the Snowy Mountains scheme Moye D. G. Engineering geology for the Snowy Mountains scheme J. Inst. Engrs., Australia 1955 27 281 299 J. Inst. Engrs., Australia Neilson J. L. 9 42 1970 Notes on weathering of the Silurian rocks of the Melbourne district Neilson J. L. Notes on weathering of the Silurian rocks of the Melbourne district J. Inst. Engrs., Australia 1970 42 9 12 10.1144/GSL.QJEG.1970.003.03.02 Ollier C. D. Weathering 1969 London Longman 304 pp Proc. 2nd Southeast Asian Conf. Soil Engng. Patwardhan A. S. 265 1970 Patwardhan A. S., Rao J. S., Gaidhane R. B. Interlocking effects and shearing resistance of boulders and large size particles in a matrix of fines on the basis of large scale direct shear tests 1970 Proc. 2nd Southeast Asian Conf. Soil Engng. Singapore 265 273 10.1130/0016-7606(1957)68[1263:WOGAAE]2.0.CO;2 Proc. 3rd Australia-N.Z. Conf. Geomechanics Sancio R. T. 2-81 2 1980 Sancio R. T., Brown I. A classification of weathered foliated rocks for use in slope stability problems 1980 2 Proc. 3rd Australia-N.Z. Conf. Geomechanics Wellington 2-81 2-86 10.1016/0013-7952(70)90021-9 Proc. Conf. In Situ Investigations in Soils and Rocks Wakeling T. R. M. 22 17 1970 Wakeling T. R. M. A comparison of the results of standard site investigation methods against the results of a detailed geotechnical investigation in the Middle Chalk at Mundford, Norfolk 1970 17 Proc. Conf. In Situ Investigations in Soils and Rocks London 22 10.1680/geot.1968.18.4.399 Proc. 3rd Int. Conf. Soil Mech. Found. Engng. Vargas M. 67 1953 Vargas M. Some engineering properties of residual clay soils occurring in Southern Brazil 1953 I Proc. 3rd Int. Conf. Soil Mech. Found. Engng. Zurich 67 71