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Considerable aspects of geology during rock-stress measurement in rock mass (in Chinese)
47A
Geology 852051 Fractures as conducting dykes and corresponding twodimensional models Adam, A Geophys Prospect V32, N4, Aug 1984, P543-553 A statistical treatment of MT data from the Pannonian Basin, Hungary, based on the distortion theory of the S-effect suggests that the local increase in crustal conductivity is connected with deep fractures. Field model measurements were performed in a shallow, quasi two-dimensional basin of well known tectonics using MT station distances of 1-2km. Results of investigation and numerical modelling of near surface distortions support the idea that deep fractures (faults) contain conducting formations. According to 2-D model computations, several conductivity dykes at considerable depth can cause anomalies indiscernible from an anomaly due to a conducting layer. 852052 Considerable aspects of geology during rock-stress measurement in rock mass (In Chinese) Yao Baokui Nonferrous Met V36, N3, Aug 1984, P28-34 852053 Review of geology and engineering geology in Singapore Pitts, J Q J £ngng Geoi v17, N2, 1984, P93-101 A review of the more important geological formations in Singapore and their engineering geological significance. The main solid formations, both igneous and sedimentary, are deeply weathered. They have a high degree of fracturing and the sedimentary Jurong Formation has a high, but variable dip. They are overlain by Quaternary deposits, many of which have poor geotechnical properties. A soft marine clay and overlying peaty deposits present particular problems in excavation, each having a low strength and high compressibility and water tables close to the ground surface. Variations in the geotechnical characteristics of the marine clay are now being recognised. The soft deposits are mainly found in buried channels which have steep sides, and at many sites geotechnical conditions change rapidly. 852054 Engineering geology of the Hammana landslide, Lebanon Khawlie, M R: Hassanain, H I Q J Engng Geol VIT, N2, 1984, P137-148 The geological and engineering parameters of the Hammana landslide-prone area have been assessed using both field and laboratory tests. Stratigraphical, lithological, structural and geomorphological inputs are delineated. The rocks, limestones, marls, sandstones, basalts and unconsolidated cover, possess a high variability in their iithologicai and geotechnical properties, inducing weakness and directly contributing to the instability of the area. The types of mass movement correlate either with compact cliff-making rock units, (rock and debris falls and rock slides) or with surficial and other relatively unconsolidated materials, (earth flows and creep). Four dominant slope segments with increasing stability have evolved: these are upstanding, convex, concave and rectilinear. Slope stability analysis indicates a more stable 'depositional' zone compared to the 'erosional' zone.
852055 Contribution to the study of volcano eruptions applying to 'La Soufriere' (In French) Aymeric, G; Pettier, M; Philippe, C; Pozzi, J P Rev Fr Geotech N27, 1984, P68-74 The state of stress resulting from an increase of the magmatic pressure in a volcano was calculated using the finite element method and calculation software. From the stress and magnetic variations in the volcano, a magnetic anomaly in various geographical points was calculated. The results compare satisfactorily to measurements in situ.
Tectonic processes 852056 Approximating surface deformation from a buried strike-slip fault or shear crack in a mildly uneven half-space Mahrer, K D Bull Seismoi Soc Am V74, N3, June 1984, P797-803 A mathematical method developed for approximating the elastostatic deformation fields (strains and displacements) produced by a buried strike-slip fault or long shear crack in a mildly uneven, homogeneous elastic half-space is presented. 852057 Ground motion near an expanding preexisting crack Chouet, B J Volcanol Geotherm Rcs VI9, N3-4, Dec 1983, P367-379 A study is presented to assess the major characteristics of the ground motion resulting from an incremental extension of a buried preexisting vertical crack, driven by excess tensile stress. Using the discrete wave number method, a complete representation of the 3 components of ground displacement is obtained and the effects of the medium structure on the ground response are analysed. Major features found in the ground displacements are the strong over-shoot of the dynamic motion in relation to the static deformation directly above the crack, the dominance of the vertical component at the epicentre, the predominance of horizontal motion at some distance from the source and the direction of the first motion which is everywhere outward.
Environmental effects, weathering and soil formation 852058 Characteristics and rates of the various slope degradation processes in the Barton Clay Cliffs of Hampshire Barton, M E; Coles, B J Q J Engng Geol VI7. N2, 1984, Pl17-136 The degradation processes include bench sliding, (involving movement of colluvium over a preferred bedding plane), scarp slumping, spalling (including toppling and soil falls), debris sliding, mudsliding, mud runs, stream erosion and man-related processes. The main method of study was periodic surveying of surface pegs using Electronic Distance Measuring equipment. Also sub-surface information was obtained from the installation of inclinometer tubing, slip indicators and standpipe/piezometers. Bench sliding is by far the most significant process in terms of volume of colluvium moved through the undercliff, accounting for 93% of the total volume of colluvium contained in the area.
Geology 852051 Fractures as conducting dykes and corresponding twodimensional models Adam, A Geophys Prospect V32, N4, Aug 1984, P543-553 A statistical treatment of MT data from the Pannonian Basin, Hungary, based on the distortion theory of the S-effect suggests that the local increase in crustal conductivity is connected with deep fractures. Field model measurements were performed in a shallow, quasi two-dimensional basin of well known tectonics using MT station distances of 1-2km. Results of investigation and numerical modelling of near surface distortions support the idea that deep fractures (faults) contain conducting formations. According to 2-D model computations, several conductivity dykes at considerable depth can cause anomalies indiscernible from an anomaly due to a conducting layer. 852052 Considerable aspects of geology during rock-stress measurement in rock mass (In Chinese) Yao Baokui Nonferrous Met V36, N3, Aug 1984, P28-34 852053 Review of geology and engineering geology in Singapore Pitts, J Q J £ngng Geoi v17, N2, 1984, P93-101 A review of the more important geological formations in Singapore and their engineering geological significance. The main solid formations, both igneous and sedimentary, are deeply weathered. They have a high degree of fracturing and the sedimentary Jurong Formation has a high, but variable dip. They are overlain by Quaternary deposits, many of which have poor geotechnical properties. A soft marine clay and overlying peaty deposits present particular problems in excavation, each having a low strength and high compressibility and water tables close to the ground surface. Variations in the geotechnical characteristics of the marine clay are now being recognised. The soft deposits are mainly found in buried channels which have steep sides, and at many sites geotechnical conditions change rapidly. 852054 Engineering geology of the Hammana landslide, Lebanon Khawlie, M R: Hassanain, H I Q J Engng Geol VIT, N2, 1984, P137-148 The geological and engineering parameters of the Hammana landslide-prone area have been assessed using both field and laboratory tests. Stratigraphical, lithological, structural and geomorphological inputs are delineated. The rocks, limestones, marls, sandstones, basalts and unconsolidated cover, possess a high variability in their iithologicai and geotechnical properties, inducing weakness and directly contributing to the instability of the area. The types of mass movement correlate either with compact cliff-making rock units, (rock and debris falls and rock slides) or with surficial and other relatively unconsolidated materials, (earth flows and creep). Four dominant slope segments with increasing stability have evolved: these are upstanding, convex, concave and rectilinear. Slope stability analysis indicates a more stable 'depositional' zone compared to the 'erosional' zone.
852055 Contribution to the study of volcano eruptions applying to 'La Soufriere' (In French) Aymeric, G; Pettier, M; Philippe, C; Pozzi, J P Rev Fr Geotech N27, 1984, P68-74 The state of stress resulting from an increase of the magmatic pressure in a volcano was calculated using the finite element method and calculation software. From the stress and magnetic variations in the volcano, a magnetic anomaly in various geographical points was calculated. The results compare satisfactorily to measurements in situ.
Tectonic processes 852056 Approximating surface deformation from a buried strike-slip fault or shear crack in a mildly uneven half-space Mahrer, K D Bull Seismoi Soc Am V74, N3, June 1984, P797-803 A mathematical method developed for approximating the elastostatic deformation fields (strains and displacements) produced by a buried strike-slip fault or long shear crack in a mildly uneven, homogeneous elastic half-space is presented. 852057 Ground motion near an expanding preexisting crack Chouet, B J Volcanol Geotherm Rcs VI9, N3-4, Dec 1983, P367-379 A study is presented to assess the major characteristics of the ground motion resulting from an incremental extension of a buried preexisting vertical crack, driven by excess tensile stress. Using the discrete wave number method, a complete representation of the 3 components of ground displacement is obtained and the effects of the medium structure on the ground response are analysed. Major features found in the ground displacements are the strong over-shoot of the dynamic motion in relation to the static deformation directly above the crack, the dominance of the vertical component at the epicentre, the predominance of horizontal motion at some distance from the source and the direction of the first motion which is everywhere outward.
Environmental effects, weathering and soil formation 852058 Characteristics and rates of the various slope degradation processes in the Barton Clay Cliffs of Hampshire Barton, M E; Coles, B J Q J Engng Geol VI7. N2, 1984, Pl17-136 The degradation processes include bench sliding, (involving movement of colluvium over a preferred bedding plane), scarp slumping, spalling (including toppling and soil falls), debris sliding, mudsliding, mud runs, stream erosion and man-related processes. The main method of study was periodic surveying of surface pegs using Electronic Distance Measuring equipment. Also sub-surface information was obtained from the installation of inclinometer tubing, slip indicators and standpipe/piezometers. Bench sliding is by far the most significant process in terms of volume of colluvium moved through the undercliff, accounting for 93% of the total volume of colluvium contained in the area.