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Rock susceptibility meter. 2F
I02A
Deformation characteristics BROWN, SF HYDE,AF Significance of cyclic ccaflning stress in repeatedload triaxial testing of granular material. IOF,IT, SR. TRANSP.RES .REC.,N~37,1975, P~9- ~8.
%9 FARZIN,~ KRIZ~,RJ COROTIS,RB Evaluation of modulus and Poissc~s ratio from triaxial tests. 7F,6R. ~RA_NSP.RES .REC.,N~37~ 1975 ~P69-80. A method, based on l i n e a r elasticity, is suggested for determining plece-wise linear, stress dependent relationships for the modulus and Poissoms ratio of soils. 970 CORNET,FH Analysis of the deformation of saturated porous rocks in compression. Thesis. D .THESIS,UNIV .MINNESOTA, USA, 1975,283P. 971 ROSSO,RS A c o n ~ a r i s o n o f ~ o i n t s t i f f n e s s measurements i n d i r e c t s h e a r t r i a x i a l compression~ and i n s i t u . 7F~ST,~R.
IRT.J.ROCK MECH .MIN.SC I .GEOMECH .ABS'I~.,Vl3, N6, JUNE, 1976,P167-172. 972 DIGBY, PJ UNIV BRADFORD, GB NURRELE, SA UNIV COLL LONDON, GB Deformation of flat ellipsoidal cavities under large confining l~easures. I~R. BULL. SEIS~0L .SOC .AM.,V66, N2~I976,P~25-~31. The l~roblem concerns an elastic body coutalning ellipsoidal cavities which ere closed by ~essure e~d sheared. It is found %hat the deformed cavity remains e ~ p s o i d a l i n s h a p e , so t h a t c l o s u r e o c c u r s s~w,~taneousl~ o v e r t h e whole boundary~ b u t t h e deformed axes e r e r o t a t e d w i t h r e s p e c t t o t h e undeformed a x e s . E x p r e s s i o n s a r e
derived for the cavity closure stress and the tmlform tractions acting on the surface of the closed cavity. UNVALA, BA IMP COLE SCI & ~ , L O N D O N , GB GRE~,AK IMP COLE SCI & TECHN, LONDON, GB Inexpensive system for precision strain gauge momit~ring. 3F,2T,3R. J .PHYS .E,V9,N~, 1976, P368-371 • D e s c r i b e s d e s i g n , c o n s t r i c t i o n and performance of system which uses low drift DC amplifiers suitable for converting the t y p i c ~ s-~1~ output of a strain gauge bridge into an easily ,~X,~t~red voltage. Describes briefly a ~ a t i c m s to load m ~ t ~ r i m g and displ~F and remote continuous load mmaitorlng.
Physico-chemical properties 97~ ~YgARD, DW D~BLIN INST ADV S~JDIES,EIR WAI/ACE, G DUBLIN INST ADV STUDIES,EIR Rock susce~ibility meter. 2F. J .PHYS .E,V9,N~, 1976,P257-2~8. Reds an im~n~ved instrument for the measurememt of the isotropic suscept~ility of rock specimens (2~"" diameter and length) b u e d on the use of c o ~ r c i a l electrcelic units. Claims constancy of calibration e~d si~pliclty and speed of operation.
975 COLLAR, FA INST. GEOL. SC I., LONDON, GB GR IFFITHS, DH UNIV .BIRMINGHAM, GB A laboratory study of the relationships between induced polarizatic~, permeability and matrix electrical conductivit~ in Bunter sandstones. 5F,4R. Q .J.~GNG.GEOL.Vg, NI, 1976, P57-63. Tests were carried out to determine (i) whether induced polerisation (IP) could be used to determine matrix conductivity and (2) the possible existence of a simple relationship between IP amplitude and permeability in Triassic sandstones.
Permeability and capillarity See abstract: 975.
Dynamic properties 976 MEH~IA_N,RL Dynamic strength of hydraulic fill. Technical note. 3F,IT,IR. J . G E ~ H . ~ G N G DIV .ASCE,VI02, GT6, JUNE, 1976, P641- 6~6. Dymamic triaxial tests cs~ried out an san~les of medium dense hydraulic fill taken from several old dams show that t h e s e materials exhibit a resistance to d e f o r m a t i o n under cyclic loading which is relatively hi@h in comparison to other medium demse cohesi~nless soils. The conve~tional assumption of proportionality of d~namic strength and confining l~essure would lead to substantial underestimates of dynamic strength in t h e upper few tens of feet of saturated deposits in these materials 977 NEM,BM Ultrasonlc wave ~opagation in disecatinuous rock.21R. DEPT.~WIR .TRRL LAB .REP.720,1976, PI-9. Experiments were carried out to determlue the effect of discoatluuities on the ~opa@atiom of ultrasonic waves in samples of chalk and sandstome obtained from tunnel sites at C~nnor, Oxfordshire and Warri~tc~, Cheshire respectively. In l~rticular the effect of normal stress across a closed discontinuity was investigated. Tests to determine the wave velocity, attsmuatiom coefficients and the effect of ur~iaxial compressive stress in intact samples of the rocks are also described. A brief review of work in this field is included and com~mrisoms ere made with results obtained by other workers. The 'Pundit' ultrasonlc velocity measuri~ e q u i ~ t was used for the experimental work and l ~ o r m e d well in the laboratory and under difficult c c ~ d i t i ~ on site. Ccmclusi~ms a r e dra~n c a t h e s p e c i f i c and b r o a d i ~ p l i c a t i o n s o f t h e work
respectively for seismic probing ahead at ultras~nlc frequencies and oa ultrasonic evaluation of rock quality in a tunnelling context. Auth. 978 BLAKE,TR SYSTS, SC I,SOFTWARE, LA JOLIA, USA DI~ES,JK LOS ALAMOS SCI L~B,N M~C,USA Om viscosity and the inelastic nature of waves in geological media. 6F,2~. _ BULL. S~ISHOL. SOC .AM .V66,N2,1976, P~53- ~ 5 . An as~a@totic solution for spherical w~ve ~Ol~gatlm~ in liues~ viscoelastic solids is compared with l~rticle velocity measurements from undergrou~i explosive tests in tuff. The qualitative nature of the t h ~ e t i c a l solutio~ is similar to that of the measured velocity time histories. When material ~ kinematic ~ a m e t e r s in the model ere specified, good qusntitative agreement is obtained with respect to the radial at~emuaticn of %he megmlt~es and radial growth of the wavelengths.
Deformation characteristics BROWN, SF HYDE,AF Significance of cyclic ccaflning stress in repeatedload triaxial testing of granular material. IOF,IT, SR. TRANSP.RES .REC.,N~37,1975, P~9- ~8.
%9 FARZIN,~ KRIZ~,RJ COROTIS,RB Evaluation of modulus and Poissc~s ratio from triaxial tests. 7F,6R. ~RA_NSP.RES .REC.,N~37~ 1975 ~P69-80. A method, based on l i n e a r elasticity, is suggested for determining plece-wise linear, stress dependent relationships for the modulus and Poissoms ratio of soils. 970 CORNET,FH Analysis of the deformation of saturated porous rocks in compression. Thesis. D .THESIS,UNIV .MINNESOTA, USA, 1975,283P. 971 ROSSO,RS A c o n ~ a r i s o n o f ~ o i n t s t i f f n e s s measurements i n d i r e c t s h e a r t r i a x i a l compression~ and i n s i t u . 7F~ST,~R.
IRT.J.ROCK MECH .MIN.SC I .GEOMECH .ABS'I~.,Vl3, N6, JUNE, 1976,P167-172. 972 DIGBY, PJ UNIV BRADFORD, GB NURRELE, SA UNIV COLL LONDON, GB Deformation of flat ellipsoidal cavities under large confining l~easures. I~R. BULL. SEIS~0L .SOC .AM.,V66, N2~I976,P~25-~31. The l~roblem concerns an elastic body coutalning ellipsoidal cavities which ere closed by ~essure e~d sheared. It is found %hat the deformed cavity remains e ~ p s o i d a l i n s h a p e , so t h a t c l o s u r e o c c u r s s~w,~taneousl~ o v e r t h e whole boundary~ b u t t h e deformed axes e r e r o t a t e d w i t h r e s p e c t t o t h e undeformed a x e s . E x p r e s s i o n s a r e
derived for the cavity closure stress and the tmlform tractions acting on the surface of the closed cavity. UNVALA, BA IMP COLE SCI & ~ , L O N D O N , GB GRE~,AK IMP COLE SCI & TECHN, LONDON, GB Inexpensive system for precision strain gauge momit~ring. 3F,2T,3R. J .PHYS .E,V9,N~, 1976, P368-371 • D e s c r i b e s d e s i g n , c o n s t r i c t i o n and performance of system which uses low drift DC amplifiers suitable for converting the t y p i c ~ s-~1~ output of a strain gauge bridge into an easily ,~X,~t~red voltage. Describes briefly a ~ a t i c m s to load m ~ t ~ r i m g and displ~F and remote continuous load mmaitorlng.
Physico-chemical properties 97~ ~YgARD, DW D~BLIN INST ADV S~JDIES,EIR WAI/ACE, G DUBLIN INST ADV STUDIES,EIR Rock susce~ibility meter. 2F. J .PHYS .E,V9,N~, 1976,P257-2~8. Reds an im~n~ved instrument for the measurememt of the isotropic suscept~ility of rock specimens (2~"" diameter and length) b u e d on the use of c o ~ r c i a l electrcelic units. Claims constancy of calibration e~d si~pliclty and speed of operation.
975 COLLAR, FA INST. GEOL. SC I., LONDON, GB GR IFFITHS, DH UNIV .BIRMINGHAM, GB A laboratory study of the relationships between induced polarizatic~, permeability and matrix electrical conductivit~ in Bunter sandstones. 5F,4R. Q .J.~GNG.GEOL.Vg, NI, 1976, P57-63. Tests were carried out to determine (i) whether induced polerisation (IP) could be used to determine matrix conductivity and (2) the possible existence of a simple relationship between IP amplitude and permeability in Triassic sandstones.
Permeability and capillarity See abstract: 975.
Dynamic properties 976 MEH~IA_N,RL Dynamic strength of hydraulic fill. Technical note. 3F,IT,IR. J . G E ~ H . ~ G N G DIV .ASCE,VI02, GT6, JUNE, 1976, P641- 6~6. Dymamic triaxial tests cs~ried out an san~les of medium dense hydraulic fill taken from several old dams show that t h e s e materials exhibit a resistance to d e f o r m a t i o n under cyclic loading which is relatively hi@h in comparison to other medium demse cohesi~nless soils. The conve~tional assumption of proportionality of d~namic strength and confining l~essure would lead to substantial underestimates of dynamic strength in t h e upper few tens of feet of saturated deposits in these materials 977 NEM,BM Ultrasonlc wave ~opagation in disecatinuous rock.21R. DEPT.~WIR .TRRL LAB .REP.720,1976, PI-9. Experiments were carried out to determlue the effect of discoatluuities on the ~opa@atiom of ultrasonic waves in samples of chalk and sandstome obtained from tunnel sites at C~nnor, Oxfordshire and Warri~tc~, Cheshire respectively. In l~rticular the effect of normal stress across a closed discontinuity was investigated. Tests to determine the wave velocity, attsmuatiom coefficients and the effect of ur~iaxial compressive stress in intact samples of the rocks are also described. A brief review of work in this field is included and com~mrisoms ere made with results obtained by other workers. The 'Pundit' ultrasonlc velocity measuri~ e q u i ~ t was used for the experimental work and l ~ o r m e d well in the laboratory and under difficult c c ~ d i t i ~ on site. Ccmclusi~ms a r e dra~n c a t h e s p e c i f i c and b r o a d i ~ p l i c a t i o n s o f t h e work
respectively for seismic probing ahead at ultras~nlc frequencies and oa ultrasonic evaluation of rock quality in a tunnelling context. Auth. 978 BLAKE,TR SYSTS, SC I,SOFTWARE, LA JOLIA, USA DI~ES,JK LOS ALAMOS SCI L~B,N M~C,USA Om viscosity and the inelastic nature of waves in geological media. 6F,2~. _ BULL. S~ISHOL. SOC .AM .V66,N2,1976, P~53- ~ 5 . An as~a@totic solution for spherical w~ve ~Ol~gatlm~ in liues~ viscoelastic solids is compared with l~rticle velocity measurements from undergrou~i explosive tests in tuff. The qualitative nature of the t h ~ e t i c a l solutio~ is similar to that of the measured velocity time histories. When material ~ kinematic ~ a m e t e r s in the model ere specified, good qusntitative agreement is obtained with respect to the radial at~emuaticn of %he megmlt~es and radial growth of the wavelengths.