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Engineering-geological characteristics and classification of the major superficial soils of the Niger Delta
56A 882024 Instrumentation in groundwater Charles, J A In: Groundwater in Engineering Geology (papers to the 21st
Annual Conference of tile F.ngiueeriag Group of the Geological ~ t y , SIwfteld, 15'19 September, 1985) P259262. Publ London: Geological Society, 1986 The basic relationships for groundwater flow are presented. Instrumentation to measure rate of flow, tracer techniques to measure seepage flow, measurement of permeability and hydraulic gradients, the use of infrared thermography to detect concentrated leakage or flow, and the measurement of settlement caused by groundwater flow are discussed.
Chemical and physical changes due to water See also: 882100
Properties of Rocks and Soils 882028 Engineering-geological characteristics and classification of the major superficial soils of the Niger Delta Akpokodje, E G Engng Gcol V23, N3/4, July 1987, P193-211 A survey of superficial soils in the Niger Delta was carried out. Four major soil groups were recognised on the basis of similarity in geotechnical, geological, and geomorphoiogical properties. The soils are essentially fine grained clays containing sand, silt, and organic matter. Clay, silt, and organic content increase seaward. Particle size distribution, moisture content, plasticity, bulk density, and compaction, strength, and compressibility properties were recorded. Geoteehnical properties are largely influenced by composition.
882025 Economic and environmental implications of leakage upon in situ uranium mining Popielak, R S; Siegel, J Min Engng 1/30, NS, Aug 1987, P800-804
882029 Engineering characteristics of British over-consolidated clays and medrucks, II. Mesozoic deposits Cripps, J C; Taylor, R K
The computer program TRACER3D was used to simulate lixiviant travel paths for in situ leaching of an ore zone aquifer under various degrees of confinement and for a stratified ore zone aquifer. Two injection wells and a single pumping well are assumed. Leakage affects the economics of in situ mining by increasing the time required to leach out the ore and increasing the thickness of the ore zone to be restored. Environmental effects appear minimal as in all cases the lixiviant did not contact the confining strata.
Published geotechnical data have been collected and collated. Classification, shear strength, deformability, permeability, consolidation and other geotechnical properties are tabulated, Variations in parameters are discussed in terms of mineralogy, location, and geological loading history. Weathering is the major cause of variations and, to a lesser extent, sampling and testing procedures. The information :is discussed with a view to assisting interpretation of new data from argillaceous horizons.
882026 Drainage-induced land subsidence in metropolitan New Orleans, Louisiana, U.S.A. Snowden, J O
882030 ln--situ testing of peat Landva, A
Proc 3rd International Symposium on Land Subsidence, Venice, 19-25 March, 1984 P507-527. Publ Wallingford: IA HS. 1986 Factors affecting land subsidence on drainage and reclamation, primary and secondary consolidation, shrinkage, soil type and thickness, are introduced. Knowing these, it is possible to predict areas liable to future hazardous subsidence, and to modify drainage systems to keep subsidence prone soils as moist as possible. A number of case studies showing foundation design, differential settlement and long term behaviour are presented.
882027 Natural and induced sinkhole development in the eastern United States Newton, J G Proc 3rd International Symposium on Land Subsidence, Venice, 19-25 ?darcli, 1984 P549-564. Publ Wallingford: IAHS, 1986 A survey has found sinkhole development in 19of the 31 eastern states of the USA. Structural damage or pollution of groundwater may follow sinkhole formation. Sinkholes can be divided into two categories, induced (accelerated or caused by man) and natural. Most of the former class result from groundwater level drop due to pumping, or diversion or impoundment of surface water. Natural sinkholes arise from progressive solution of the bedrock and from natural water level declines which trigger the same mechanisms as cause induced sinkholes.
Engng Geol V23, N3/4, July 1987, P213-253
In: Use of In Situ Tests in Geotecimical Engineering (papers to the Conference, Binckslmrg, 23-25 June 1986) PI91-205. Publ New York: ASCE, 1986 ( ASCE Geotechnical Special Publication No 6) The fibrous nature of peat and peaty organic soils affects their mode of deformation and failure, and many 'standard' geotechnical tests, such as plate load, static cone penetration, and vane shear, are inapplicable. For construction on peatlands, the only meaningful field test is the use of test fills, and this is limited by practical considerations. It is suggested that laboratory testing under controlled conditions may be more representative of field conditions than are standard field tests.
882031 Pressuremeter correlations for preconsolidated clay Martin, R E; Drahos, E G In: Use of In Situ Tests in Geoteclmical Falgiueeriug (papers to the Conference, Blacksburg, 23-25 Jum¢ 1986) P206-220. Publ New York: ASCE. 1986 (ASCE Geotechnicat Special Publication No 6) Design parameters for foundations in the sensitive, highly preconsotidated clays underlying Richmond, Virginia, USA, are often based on results of conventional triaxial compression and consolidation tests. Menard pressuremeter test results have recently been used in foundation design. Correlations between undrained shear strength, preconsolidation pressure. and constrained reload modulus from laboratory and pressuremeter tests are presented.
© 1988 Pergamon Press pie. Reproduction not permitted
Annual Conference of tile F.ngiueeriag Group of the Geological ~ t y , SIwfteld, 15'19 September, 1985) P259262. Publ London: Geological Society, 1986 The basic relationships for groundwater flow are presented. Instrumentation to measure rate of flow, tracer techniques to measure seepage flow, measurement of permeability and hydraulic gradients, the use of infrared thermography to detect concentrated leakage or flow, and the measurement of settlement caused by groundwater flow are discussed.
Chemical and physical changes due to water See also: 882100
Properties of Rocks and Soils 882028 Engineering-geological characteristics and classification of the major superficial soils of the Niger Delta Akpokodje, E G Engng Gcol V23, N3/4, July 1987, P193-211 A survey of superficial soils in the Niger Delta was carried out. Four major soil groups were recognised on the basis of similarity in geotechnical, geological, and geomorphoiogical properties. The soils are essentially fine grained clays containing sand, silt, and organic matter. Clay, silt, and organic content increase seaward. Particle size distribution, moisture content, plasticity, bulk density, and compaction, strength, and compressibility properties were recorded. Geoteehnical properties are largely influenced by composition.
882025 Economic and environmental implications of leakage upon in situ uranium mining Popielak, R S; Siegel, J Min Engng 1/30, NS, Aug 1987, P800-804
882029 Engineering characteristics of British over-consolidated clays and medrucks, II. Mesozoic deposits Cripps, J C; Taylor, R K
The computer program TRACER3D was used to simulate lixiviant travel paths for in situ leaching of an ore zone aquifer under various degrees of confinement and for a stratified ore zone aquifer. Two injection wells and a single pumping well are assumed. Leakage affects the economics of in situ mining by increasing the time required to leach out the ore and increasing the thickness of the ore zone to be restored. Environmental effects appear minimal as in all cases the lixiviant did not contact the confining strata.
Published geotechnical data have been collected and collated. Classification, shear strength, deformability, permeability, consolidation and other geotechnical properties are tabulated, Variations in parameters are discussed in terms of mineralogy, location, and geological loading history. Weathering is the major cause of variations and, to a lesser extent, sampling and testing procedures. The information :is discussed with a view to assisting interpretation of new data from argillaceous horizons.
882026 Drainage-induced land subsidence in metropolitan New Orleans, Louisiana, U.S.A. Snowden, J O
882030 ln--situ testing of peat Landva, A
Proc 3rd International Symposium on Land Subsidence, Venice, 19-25 March, 1984 P507-527. Publ Wallingford: IA HS. 1986 Factors affecting land subsidence on drainage and reclamation, primary and secondary consolidation, shrinkage, soil type and thickness, are introduced. Knowing these, it is possible to predict areas liable to future hazardous subsidence, and to modify drainage systems to keep subsidence prone soils as moist as possible. A number of case studies showing foundation design, differential settlement and long term behaviour are presented.
882027 Natural and induced sinkhole development in the eastern United States Newton, J G Proc 3rd International Symposium on Land Subsidence, Venice, 19-25 ?darcli, 1984 P549-564. Publ Wallingford: IAHS, 1986 A survey has found sinkhole development in 19of the 31 eastern states of the USA. Structural damage or pollution of groundwater may follow sinkhole formation. Sinkholes can be divided into two categories, induced (accelerated or caused by man) and natural. Most of the former class result from groundwater level drop due to pumping, or diversion or impoundment of surface water. Natural sinkholes arise from progressive solution of the bedrock and from natural water level declines which trigger the same mechanisms as cause induced sinkholes.
Engng Geol V23, N3/4, July 1987, P213-253
In: Use of In Situ Tests in Geotecimical Engineering (papers to the Conference, Binckslmrg, 23-25 June 1986) PI91-205. Publ New York: ASCE, 1986 ( ASCE Geotechnical Special Publication No 6) The fibrous nature of peat and peaty organic soils affects their mode of deformation and failure, and many 'standard' geotechnical tests, such as plate load, static cone penetration, and vane shear, are inapplicable. For construction on peatlands, the only meaningful field test is the use of test fills, and this is limited by practical considerations. It is suggested that laboratory testing under controlled conditions may be more representative of field conditions than are standard field tests.
882031 Pressuremeter correlations for preconsolidated clay Martin, R E; Drahos, E G In: Use of In Situ Tests in Geoteclmical Falgiueeriug (papers to the Conference, Blacksburg, 23-25 Jum¢ 1986) P206-220. Publ New York: ASCE. 1986 (ASCE Geotechnicat Special Publication No 6) Design parameters for foundations in the sensitive, highly preconsotidated clays underlying Richmond, Virginia, USA, are often based on results of conventional triaxial compression and consolidation tests. Menard pressuremeter test results have recently been used in foundation design. Correlations between undrained shear strength, preconsolidation pressure. and constrained reload modulus from laboratory and pressuremeter tests are presented.
© 1988 Pergamon Press pie. Reproduction not permitted