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Interpretation of piezocone penetrometer profiles in sediment from the Mackenzie trough, Canadian Beaufort Sea
248A 895154 Investigations of shallow water muddy sediments by resistivity measurements
Bondesen, E; Bidstrup, T; Schroder, N Proc Ninth Southeast Asian Geoteclmical Conference, Bangkok, 7-11 December 1987 V1, P3.75-3.82. Publ Bangkok: Southeast Asian Geotechnical Society, 1987 A method based on resistivity to take continuous recordings of organic mud thickness from a boat is described. Inversion of the resistivity soundings, instrumentation and geological interpretation are outlined. The method is illustrated for Roskilde Fjord where the geology is already known from drilling, sampling and shallow seismic work.
Borehole and core logging See also: 895263 895155 Evaluation of test holes in mines by logging (In French) Straub, A Industrie Minerale V71, March 1989, P73-78 Core drilling, recovery, and logging provides valuable information but is expensive and time consuming. Recent advances in borehole logging allow accurate data to be acquired whilst employing destructive drilling techniques. Equipment, techniques, and interpretive methods for measurements of conductivity, magnetic susceptibility, density and induced polarization are described. 895156 Determination of prestress of in situ soils using acoustic emissions Deutsch, W L; Koerner, R M; Lord, A E J Geotech Engng Div ASCE V!15. N2, Feb 1989, P228-245 Field testing of an acoustic emission technique to estimate preconsolidation pressure of a foundation is presented. A conventional Menard pressuremeter was modified by adding an AE transducer, so that AE output from the deforming soil mass could be monitored at the same time as pressure and volume data were obtained from the pressuremeter tests. Tests on 6 fine-grained residual soils gave an AE response which clearly defined a value of horizontal stress at which AE activity changed significantly. It is proposed that this gives a reasonable estimate of the horizontal component of in situ preconsolidation stress, which is confirmed by laboratory testing. 895157 Interpretation of piezocone penetrometer profiles in sediment from the Mackenzie trough, Canadian Beaufort Sea Moran, K; Hill, P R; Blasco, S M J Sediment Petrol V59, NI. Jan 1989, P88-97 The piezocone penetrometer may be used as a continuous in situ stratigraphic tool to provide good quality sedimentoiogical data for marine sediments where high quality, undisturbed samples are difficult to obtain. Penetrometer readings were used to study a site in the Canadian Beaufort Sea. The penetrometer provided a continuous profile which was interpreted sedimentologically and used to supplement and extend borehole sample data. Shallow, high resolution analogue seismic reflection profiles were also obtained. Direct correlation was obtained between interpreted piezocone profiles and seismic data and collected samples.
895158 Injected marl seams as drilling artefacts in chalk cores: technical note Hilbrecht, H: Meyer, T Q 1 Engng Geol V22, NI, 1989. P87-89 Artificially produced marls were injected into cores as a result of the drilling process. The artificial marls resemble thin debris flow deposits,and are a mixture of mud and cuttings injected into the core in a state of plastic behaviour. It is important that they are distinguished from naturally occurring marls, used as marker horizons.
895159 Investigating subsurface fuel releases Holbrook, T Proc 9th Annual Symposium on Geotechnical and Geohydrological Aspects of Waste Management, Fort Collins, 1-6 February 1987 P287-298. Publ Chelsea, Michigan: Lewis, 1987 Investigations to detect hydrocarbon leakage into soils above the water table are discussed, with emphasis on thorough preliminary investigation and soil vapour surveys to reduce the number of expensive monitoring wells. Vapour survey methods, sampling, and equipment are described. Case studies of the location of the source of a hydrocarbon seep on a stream bank and of determining the extent of a surface spill are presented.
895160 Hydrogeologic aspects of reclamation of the Ray Point Tailings Facility: a case study Miller, L L; Davis, L A Proc 9th Annual Symposium on Geotechnical and Geohydrological Aspects of Waste Management, Fort Collins, 1-6 February 1987 P299-310. Publ Chelsea. Michigan: Lewis, 1987 Decommissioning of a uranium tailings impoundment in Texas is described. Climatic, geologic, and hydrologic setting is presented. The final dump design, intended to minimise and direct runoff, is explained. Dump water penetration into underlying clays was found to be larger than expected, and wells were installed and samples taken to accumulate water quality data. Analysis suggests that moisture migration is acceptable at the present and will decrease once the dump is finally covered with clay. The plan is awaiting approval.
895161 ln-situ testing of residual soils in Singapore Chang, M F Proc 2nd International Conference on Geomechanics in Tropical Soils, Singapore, 12-14 December 1988 VI, P97-108. Pub/Rotterdam: A A Balkema, 1988 The residual soils are heterogeneous, stiff and textured, making undisturbed sampling difficult. In situ tests at 5 sites comprised standard penetration (SPT), ram sounding (RST), weight sounding (WST), cone penetration (CPT), flat dilatometer (DMT), pressuremeter (PMT) and plate load (PLT). Comparisons were made between test results, such as RST and SPT, PMT and DMT, and CPT and SPT. General correlation is shown. For good site investigation a combination of methods should be used.
1989 Pergamon Press plc. Reproduction not permitted
Bondesen, E; Bidstrup, T; Schroder, N Proc Ninth Southeast Asian Geoteclmical Conference, Bangkok, 7-11 December 1987 V1, P3.75-3.82. Publ Bangkok: Southeast Asian Geotechnical Society, 1987 A method based on resistivity to take continuous recordings of organic mud thickness from a boat is described. Inversion of the resistivity soundings, instrumentation and geological interpretation are outlined. The method is illustrated for Roskilde Fjord where the geology is already known from drilling, sampling and shallow seismic work.
Borehole and core logging See also: 895263 895155 Evaluation of test holes in mines by logging (In French) Straub, A Industrie Minerale V71, March 1989, P73-78 Core drilling, recovery, and logging provides valuable information but is expensive and time consuming. Recent advances in borehole logging allow accurate data to be acquired whilst employing destructive drilling techniques. Equipment, techniques, and interpretive methods for measurements of conductivity, magnetic susceptibility, density and induced polarization are described. 895156 Determination of prestress of in situ soils using acoustic emissions Deutsch, W L; Koerner, R M; Lord, A E J Geotech Engng Div ASCE V!15. N2, Feb 1989, P228-245 Field testing of an acoustic emission technique to estimate preconsolidation pressure of a foundation is presented. A conventional Menard pressuremeter was modified by adding an AE transducer, so that AE output from the deforming soil mass could be monitored at the same time as pressure and volume data were obtained from the pressuremeter tests. Tests on 6 fine-grained residual soils gave an AE response which clearly defined a value of horizontal stress at which AE activity changed significantly. It is proposed that this gives a reasonable estimate of the horizontal component of in situ preconsolidation stress, which is confirmed by laboratory testing. 895157 Interpretation of piezocone penetrometer profiles in sediment from the Mackenzie trough, Canadian Beaufort Sea Moran, K; Hill, P R; Blasco, S M J Sediment Petrol V59, NI. Jan 1989, P88-97 The piezocone penetrometer may be used as a continuous in situ stratigraphic tool to provide good quality sedimentoiogical data for marine sediments where high quality, undisturbed samples are difficult to obtain. Penetrometer readings were used to study a site in the Canadian Beaufort Sea. The penetrometer provided a continuous profile which was interpreted sedimentologically and used to supplement and extend borehole sample data. Shallow, high resolution analogue seismic reflection profiles were also obtained. Direct correlation was obtained between interpreted piezocone profiles and seismic data and collected samples.
895158 Injected marl seams as drilling artefacts in chalk cores: technical note Hilbrecht, H: Meyer, T Q 1 Engng Geol V22, NI, 1989. P87-89 Artificially produced marls were injected into cores as a result of the drilling process. The artificial marls resemble thin debris flow deposits,and are a mixture of mud and cuttings injected into the core in a state of plastic behaviour. It is important that they are distinguished from naturally occurring marls, used as marker horizons.
895159 Investigating subsurface fuel releases Holbrook, T Proc 9th Annual Symposium on Geotechnical and Geohydrological Aspects of Waste Management, Fort Collins, 1-6 February 1987 P287-298. Publ Chelsea, Michigan: Lewis, 1987 Investigations to detect hydrocarbon leakage into soils above the water table are discussed, with emphasis on thorough preliminary investigation and soil vapour surveys to reduce the number of expensive monitoring wells. Vapour survey methods, sampling, and equipment are described. Case studies of the location of the source of a hydrocarbon seep on a stream bank and of determining the extent of a surface spill are presented.
895160 Hydrogeologic aspects of reclamation of the Ray Point Tailings Facility: a case study Miller, L L; Davis, L A Proc 9th Annual Symposium on Geotechnical and Geohydrological Aspects of Waste Management, Fort Collins, 1-6 February 1987 P299-310. Publ Chelsea. Michigan: Lewis, 1987 Decommissioning of a uranium tailings impoundment in Texas is described. Climatic, geologic, and hydrologic setting is presented. The final dump design, intended to minimise and direct runoff, is explained. Dump water penetration into underlying clays was found to be larger than expected, and wells were installed and samples taken to accumulate water quality data. Analysis suggests that moisture migration is acceptable at the present and will decrease once the dump is finally covered with clay. The plan is awaiting approval.
895161 ln-situ testing of residual soils in Singapore Chang, M F Proc 2nd International Conference on Geomechanics in Tropical Soils, Singapore, 12-14 December 1988 VI, P97-108. Pub/Rotterdam: A A Balkema, 1988 The residual soils are heterogeneous, stiff and textured, making undisturbed sampling difficult. In situ tests at 5 sites comprised standard penetration (SPT), ram sounding (RST), weight sounding (WST), cone penetration (CPT), flat dilatometer (DMT), pressuremeter (PMT) and plate load (PLT). Comparisons were made between test results, such as RST and SPT, PMT and DMT, and CPT and SPT. General correlation is shown. For good site investigation a combination of methods should be used.
1989 Pergamon Press plc. Reproduction not permitted