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Stress strain time model for soil
80A
Time dependent behaviour 7~029 S t ~ C FLOW IN FINEGRAINED LIMESTONE Schmid, S M; Bolamd, J N; Paterson, M S TectonOl~hysics, V~3, N3-~, i0 Dec 1977, P257-291 Creep of Solnhofen limestone at temperatures between 600 deg and 900 deg C was found to fall into three different flow regimes: regime i with an exl~nential stress-depemdence of strain rate, regime 2 with power-law creep and finally a superplastic regime 3. Within the strperplastic regime the creep behaviour is strongly grainsize deper~lent, the strain rate increasing markedly with decrease in grain size at a given stress. The tectomophysical importance of superplasticity is discussed and by extrapolating the observed creep behaviour to geological strain rates it is fourzl that supe~plasticity in rocks is to be expected under a wide range of conditions, ~particularly at smut I grain sizes.
794o30 H I G H - T ~
CREEP OF MT. B U ~ DUNITE POst, R L Tectonol~hysics, V42, 1977, P75-II0
Reports a series of creep experiments in the temperature range 700-135OC, including stress relaxation and the incremental (stepped) variation of temperature and stress on a sir~le sample. Discusses the ductile faulting that occurred in most of the creep tests, and investigates the effect of water on creep behaviour. 794031 STRESS STRAIN TIME MODEL FOR SOIL Miller, E J Ph D thesis, California Unlv, Davis, 1977, 168P Avail: University Microfilms, 18 Bedford Row, London, WCIR 4EJ, UK
Physico-chemical properties 794032 EXPH~IMENTAL STUDY OF GRANITIC ROCKS OF DARJEELING (WEST BENGAL, INDIA) AND ITS APPLICATION TO THE ORIGIN OF HIMALAYAN GRANITES Ghose, N C; Sing~h, N K Tectonophysics, V~3, N1-2, 15 Nov I N , P23-
Reports experiments to determine the phase relationships of a granite and a gneiss from DarJeeling in the presence of excess water at 4 and 7 kbar pressure, in the temperature range
corresponding to the onset of dilatamcy, and ancemlous effects were seen at the approach to failure. This study suggests the eventual possibility of earthquake prediction using magnetic precursors, particularly with three-component measurements, and it indicates that multidomain materials are better tranoducers of the seismomagnetic effect than sir~le-domain materials.
79~o34 IN-SITU DETEHMINATION OF BULK ELECTRIC PROPERTIES OF COAL Chang, D C; Kuester, E F US~M OFR 107-78 Aug 1977 , 21P A survey and evaluation of established and feasible methods.
Permeability and capillarity 794035 HYDRAULIC AND ELECTRO-O~C~IC PERMEABILITY COEFFICIENTS. TECHNICAL NG2E SUmdaram, P N J Geotech E~gllg Div ASCE, V105, ~13TI, Jan
1979, 189"92 Relates to consolidation by electro-osmosis. Presents an approximate method of estimating both the coefficients from the water rise versus time readings in a one-dimenslonal flow test under constant voltage gradient. The final electrooamotic equilibrium head can also be estimated. 794036 O~M~IC METHOD FOR DETEI~INING ROCK AND AGGREGATE SUCTION CHARAOI~ISTICS WITH APPLICATIONS TO F R O ~ HEAVE S'I~'DIES Jones, R H; Hurt, K G Q J Er~mg Geol, Vll, N3, 1978, P245-2~2 A recently developed laboratcmy method in which suction is applied by osmosis has been used to determine the suction moisture cord~ent relationships of limestone rock and compacted aggregate specimens. Results were comparable with those from the suction plate and pressure membrane apparatus. It is, however, a simpler, more rapid m~chod, and permits aggregate suction characteristics to be determined easily. The suction chsmacteristics have also been used to rank the frost susceptibilities of four limestones.
Compressibility, swelling and consolidation
6oo-80oc. 794o33 MAGNETIC BEHAVIOR OF MAGNETITE AND ROCKs 5~/RESSED TO FAILURE - RELATION TO EARTHQUAKE PREDICTION Revol, J; Day, R; Fuller, M D Earth Planet Sci Lett, V37, N2, Dec 1977,
P296-306 Polycrystalline magnetite and rock samples have been subjected to uniaxial isothermal compression to failure in an attempt to see whether ar~ magnetic expression of dilatarmy could be observed. The change in magnetic susceptibility, remsr~nt moment and total moment were recorded contimmously as a function of increasir~ compression. Changes in the slopes of the magnetization-stress curves were observed for stress
794037 ONE-DIMENSIONAL CONSOLIDATION PROBLEMs Olson, R E; Ladd, C C J GeOtech Engng Div ASCE, V105, NGT1, Jan 1979, Pll-30 Classical analyses are compared with finite difference analyses that take into account timedependent loading, large strains, nonlir~sr stress strain properties, effective-stress dependent properties, hysteresis, settlement dependent submergence, layered soil deposits and other phenomena. The analyses are compared for 4 field problems ranging from settlement of embankments over stiff and soft clays to consol-
Time dependent behaviour 7~029 S t ~ C FLOW IN FINEGRAINED LIMESTONE Schmid, S M; Bolamd, J N; Paterson, M S TectonOl~hysics, V~3, N3-~, i0 Dec 1977, P257-291 Creep of Solnhofen limestone at temperatures between 600 deg and 900 deg C was found to fall into three different flow regimes: regime i with an exl~nential stress-depemdence of strain rate, regime 2 with power-law creep and finally a superplastic regime 3. Within the strperplastic regime the creep behaviour is strongly grainsize deper~lent, the strain rate increasing markedly with decrease in grain size at a given stress. The tectomophysical importance of superplasticity is discussed and by extrapolating the observed creep behaviour to geological strain rates it is fourzl that supe~plasticity in rocks is to be expected under a wide range of conditions, ~particularly at smut I grain sizes.
794o30 H I G H - T ~
CREEP OF MT. B U ~ DUNITE POst, R L Tectonol~hysics, V42, 1977, P75-II0
Reports a series of creep experiments in the temperature range 700-135OC, including stress relaxation and the incremental (stepped) variation of temperature and stress on a sir~le sample. Discusses the ductile faulting that occurred in most of the creep tests, and investigates the effect of water on creep behaviour. 794031 STRESS STRAIN TIME MODEL FOR SOIL Miller, E J Ph D thesis, California Unlv, Davis, 1977, 168P Avail: University Microfilms, 18 Bedford Row, London, WCIR 4EJ, UK
Physico-chemical properties 794032 EXPH~IMENTAL STUDY OF GRANITIC ROCKS OF DARJEELING (WEST BENGAL, INDIA) AND ITS APPLICATION TO THE ORIGIN OF HIMALAYAN GRANITES Ghose, N C; Sing~h, N K Tectonophysics, V~3, N1-2, 15 Nov I N , P23-
Reports experiments to determine the phase relationships of a granite and a gneiss from DarJeeling in the presence of excess water at 4 and 7 kbar pressure, in the temperature range
corresponding to the onset of dilatamcy, and ancemlous effects were seen at the approach to failure. This study suggests the eventual possibility of earthquake prediction using magnetic precursors, particularly with three-component measurements, and it indicates that multidomain materials are better tranoducers of the seismomagnetic effect than sir~le-domain materials.
79~o34 IN-SITU DETEHMINATION OF BULK ELECTRIC PROPERTIES OF COAL Chang, D C; Kuester, E F US~M OFR 107-78 Aug 1977 , 21P A survey and evaluation of established and feasible methods.
Permeability and capillarity 794035 HYDRAULIC AND ELECTRO-O~C~IC PERMEABILITY COEFFICIENTS. TECHNICAL NG2E SUmdaram, P N J Geotech E~gllg Div ASCE, V105, ~13TI, Jan
1979, 189"92 Relates to consolidation by electro-osmosis. Presents an approximate method of estimating both the coefficients from the water rise versus time readings in a one-dimenslonal flow test under constant voltage gradient. The final electrooamotic equilibrium head can also be estimated. 794036 O~M~IC METHOD FOR DETEI~INING ROCK AND AGGREGATE SUCTION CHARAOI~ISTICS WITH APPLICATIONS TO F R O ~ HEAVE S'I~'DIES Jones, R H; Hurt, K G Q J Er~mg Geol, Vll, N3, 1978, P245-2~2 A recently developed laboratcmy method in which suction is applied by osmosis has been used to determine the suction moisture cord~ent relationships of limestone rock and compacted aggregate specimens. Results were comparable with those from the suction plate and pressure membrane apparatus. It is, however, a simpler, more rapid m~chod, and permits aggregate suction characteristics to be determined easily. The suction chsmacteristics have also been used to rank the frost susceptibilities of four limestones.
Compressibility, swelling and consolidation
6oo-80oc. 794o33 MAGNETIC BEHAVIOR OF MAGNETITE AND ROCKs 5~/RESSED TO FAILURE - RELATION TO EARTHQUAKE PREDICTION Revol, J; Day, R; Fuller, M D Earth Planet Sci Lett, V37, N2, Dec 1977,
P296-306 Polycrystalline magnetite and rock samples have been subjected to uniaxial isothermal compression to failure in an attempt to see whether ar~ magnetic expression of dilatarmy could be observed. The change in magnetic susceptibility, remsr~nt moment and total moment were recorded contimmously as a function of increasir~ compression. Changes in the slopes of the magnetization-stress curves were observed for stress
794037 ONE-DIMENSIONAL CONSOLIDATION PROBLEMs Olson, R E; Ladd, C C J GeOtech Engng Div ASCE, V105, NGT1, Jan 1979, Pll-30 Classical analyses are compared with finite difference analyses that take into account timedependent loading, large strains, nonlir~sr stress strain properties, effective-stress dependent properties, hysteresis, settlement dependent submergence, layered soil deposits and other phenomena. The analyses are compared for 4 field problems ranging from settlement of embankments over stiff and soft clays to consol-