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Measurement of soil suction in expansive clays
25A
friction is measured. Interpretation of the te~t resUlts gives i~formation concerrdng the distribution of the stresses at the surface of the Joir~. 612038 ET~CTROSTAT!C FORCES IN SOILS Sokolovich, V E Soil Mech Found Engrg, VlT, N2, March-April 1980, ~ 7 - 6 4
Permeability and capillarity 812039 FE~%[EABILITY OF CRYSTALLINE .&ND ARGILLACEOUs ROCKS Brace, W F !nt J Rock Mech Min Sci, V17, NS, Oct 1980, P241-251 Compares published in situ measurements which give rock mass permeability with values obtained for laboratory samples and with values inferred from certain large scale geologic phenomena. Discusses these with reference to fracture permeability, prediction of rock permeability, and crustal permeability and anomalous p~re pressure. 82 refs.
812040 INFLUENCE OF FRACTURE DEFORMATION ON SECOND%~RY FEP~;~QBILITY - A NUMERICAL APPROACH Bavden, W F; Curran, J H; Roegiers, J C Int J Rock Mech Min Sci, VI7, NS, Oct 1980, P265- 27 9 The study utilizes existir~ models to study deformable fracture flow and attempts to define the rarge of influenee of frsmture deformation on conductivity and the limitations of the discrete approach. The model was found to be very sensitive to input data especially for dilatant shear problems. A rather straightforward coupling of dilatancy amd conductivity was assumed, which deserves further laboratory and field testing. The results indicate that dilatancy may be the most central parameter affecting conductivity in fracture flow. 58 refs.
Compressibility, s~'elling and consolidation OF NEW MEXICO ROCK S~IT 812041 ARGON G%~ F E P ~ I L I T Y UNDER HYDROSTATIC COMPRESSION ~u~cherland, H J; Cave, S P Int J Rock Mech Min Scl, V17, NS, Oct 1980, P281- 288 Laboratory measurements of the argon gas permeability for rock salt specimens from the Waste Isolation Pilot Plant site in Southeast New Mexico are obtained by using a transient, pressure step technique. Permeabilitles of seven specimens are investigated as a function of hydrostatic compression and time. These data when evaluated with the results of other authors, lead to the conelusions that if this formation is in a state of hydrostatic com~ession in its ~ n ~ sturbed state, then its in situ permeability is less than 5 x(10 to the power -20) sq m. And if any connected porosity is introduced into formation, as with mining, the formation can 'heal' itself if it returns to a hydrostatic pressure state. Auth.
8120~2 T H ~ A L ~"(P#~SiON #2ID L ' ~ P~2~BIL~. OF CLIN~X QUARTZ MONZO~TE TO 300 DEG C #_kD 27.6MPa Heard, H C Int J Rock Mech Min 5ci, V!7, NS, Cot 1960, P28~296 The coefficient of linear thermal expansion has been ev~-luated for Climax Stock qu~rtz momzonlte at effective pressures of 0, 13.8 and 27.6 ~Pa (0-276 bars) and at temPeratures from 19 to 300 deg C. The samples ev~_luated were deliberately chosen to include imperfections such as he~led fractures and large phenocrysts characteristic of the Climax pluton near the site of a highlevel waste repository demonstration test at the Nevada Test Site. Observations on the heated rock indicate that the thermal expansion is accompanied by new rlcrOCrack formation. At the temperatures to be expected in the wall rock near a waste canister, this increase in crack porosity is inferred to increase local permeability by factors of 2-5. 8120~ 3 PRINTED CIRCUITs FOR STUDYING ROCK .u~SS ~ ABILITY. TECHNICAL NOTE Hudson, J A; La Pointe, P R Int J Rock Mech Min Sci, V17, ~ , Oct 19~0, P297-301 Describes an analogue technique for studying the interconnection of Joints, the equivalent flc~ path lengths and hence the permeability in 9dly direction along a plane through a rock ~ s a . The Joint geometry, whether for a specific site or as a statistical simulation, is dr=_vn as an array of Joint traces. The drawing is trar~lated directly into a printed circuit which a/_l~Js the active net;ork and equivalent path ler4Kths through the geOmetry in different direc+~cns to be established rapidly. The technique has several advantages including the fact that surface and tundergrouni excavation geometries can be simulated easily and different Joint a u~rtures can be modelled. Auth. 8120h4 M E A S L ~ N T OF 8OIL SUCTION IN EXP~SIVE CLAYS Richards, B G Civ Engng Trans, Instn Engrs Australia, VCE22, N3, 1980 8120~5 EFFECT OF THE DEGREE OF INCREASE OF W % _ ~ C O ~ E N T ON THE RELATIVE SLDNPING AND CONSOLID%_~ICN OF. LOESS SOILs K/-trtovI V I; Bulgakov, V I; Korotkova, 0 N Soll Mech Found Er~ng, V17, NI, Jan-Feb 1980, F26-30
Dynamic properties See also: 812170 812046 FLANE SHOCK WAVE STUDIES OF WEST~J~Y GP.~,q/UE~ .AND NUGGET S~mDSTONE Larsonj D B; Anderson, G D Int J Rock :,!ech Min Sci, V17, ~6, Dec l~C~O, P357-363 Plane shock wave experiments were :~rforz~ by using a llght-gas gun on dry and water-saturated Westerly granite and dry Nugget sandstone. Changes in the slopes of the shock velocity versus particle velocity curves are attributed
friction is measured. Interpretation of the te~t resUlts gives i~formation concerrdng the distribution of the stresses at the surface of the Joir~. 612038 ET~CTROSTAT!C FORCES IN SOILS Sokolovich, V E Soil Mech Found Engrg, VlT, N2, March-April 1980, ~ 7 - 6 4
Permeability and capillarity 812039 FE~%[EABILITY OF CRYSTALLINE .&ND ARGILLACEOUs ROCKS Brace, W F !nt J Rock Mech Min Sci, V17, NS, Oct 1980, P241-251 Compares published in situ measurements which give rock mass permeability with values obtained for laboratory samples and with values inferred from certain large scale geologic phenomena. Discusses these with reference to fracture permeability, prediction of rock permeability, and crustal permeability and anomalous p~re pressure. 82 refs.
812040 INFLUENCE OF FRACTURE DEFORMATION ON SECOND%~RY FEP~;~QBILITY - A NUMERICAL APPROACH Bavden, W F; Curran, J H; Roegiers, J C Int J Rock Mech Min Sci, VI7, NS, Oct 1980, P265- 27 9 The study utilizes existir~ models to study deformable fracture flow and attempts to define the rarge of influenee of frsmture deformation on conductivity and the limitations of the discrete approach. The model was found to be very sensitive to input data especially for dilatant shear problems. A rather straightforward coupling of dilatancy amd conductivity was assumed, which deserves further laboratory and field testing. The results indicate that dilatancy may be the most central parameter affecting conductivity in fracture flow. 58 refs.
Compressibility, s~'elling and consolidation OF NEW MEXICO ROCK S~IT 812041 ARGON G%~ F E P ~ I L I T Y UNDER HYDROSTATIC COMPRESSION ~u~cherland, H J; Cave, S P Int J Rock Mech Min Scl, V17, NS, Oct 1980, P281- 288 Laboratory measurements of the argon gas permeability for rock salt specimens from the Waste Isolation Pilot Plant site in Southeast New Mexico are obtained by using a transient, pressure step technique. Permeabilitles of seven specimens are investigated as a function of hydrostatic compression and time. These data when evaluated with the results of other authors, lead to the conelusions that if this formation is in a state of hydrostatic com~ession in its ~ n ~ sturbed state, then its in situ permeability is less than 5 x(10 to the power -20) sq m. And if any connected porosity is introduced into formation, as with mining, the formation can 'heal' itself if it returns to a hydrostatic pressure state. Auth.
8120~2 T H ~ A L ~"(P#~SiON #2ID L ' ~ P~2~BIL~. OF CLIN~X QUARTZ MONZO~TE TO 300 DEG C #_kD 27.6MPa Heard, H C Int J Rock Mech Min 5ci, V!7, NS, Cot 1960, P28~296 The coefficient of linear thermal expansion has been ev~-luated for Climax Stock qu~rtz momzonlte at effective pressures of 0, 13.8 and 27.6 ~Pa (0-276 bars) and at temPeratures from 19 to 300 deg C. The samples ev~_luated were deliberately chosen to include imperfections such as he~led fractures and large phenocrysts characteristic of the Climax pluton near the site of a highlevel waste repository demonstration test at the Nevada Test Site. Observations on the heated rock indicate that the thermal expansion is accompanied by new rlcrOCrack formation. At the temperatures to be expected in the wall rock near a waste canister, this increase in crack porosity is inferred to increase local permeability by factors of 2-5. 8120~ 3 PRINTED CIRCUITs FOR STUDYING ROCK .u~SS ~ ABILITY. TECHNICAL NOTE Hudson, J A; La Pointe, P R Int J Rock Mech Min Sci, V17, ~ , Oct 19~0, P297-301 Describes an analogue technique for studying the interconnection of Joints, the equivalent flc~ path lengths and hence the permeability in 9dly direction along a plane through a rock ~ s a . The Joint geometry, whether for a specific site or as a statistical simulation, is dr=_vn as an array of Joint traces. The drawing is trar~lated directly into a printed circuit which a/_l~Js the active net;ork and equivalent path ler4Kths through the geOmetry in different direc+~cns to be established rapidly. The technique has several advantages including the fact that surface and tundergrouni excavation geometries can be simulated easily and different Joint a u~rtures can be modelled. Auth. 8120h4 M E A S L ~ N T OF 8OIL SUCTION IN EXP~SIVE CLAYS Richards, B G Civ Engng Trans, Instn Engrs Australia, VCE22, N3, 1980 8120~5 EFFECT OF THE DEGREE OF INCREASE OF W % _ ~ C O ~ E N T ON THE RELATIVE SLDNPING AND CONSOLID%_~ICN OF. LOESS SOILs K/-trtovI V I; Bulgakov, V I; Korotkova, 0 N Soll Mech Found Er~ng, V17, NI, Jan-Feb 1980, F26-30
Dynamic properties See also: 812170 812046 FLANE SHOCK WAVE STUDIES OF WEST~J~Y GP.~,q/UE~ .AND NUGGET S~mDSTONE Larsonj D B; Anderson, G D Int J Rock :,!ech Min Sci, V17, ~6, Dec l~C~O, P357-363 Plane shock wave experiments were :~rforz~ by using a llght-gas gun on dry and water-saturated Westerly granite and dry Nugget sandstone. Changes in the slopes of the shock velocity versus particle velocity curves are attributed