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Point load test for the tensile strength of rock
46A
813032 POINT LOAD TEST FOR THE TENSILE STRENGTH OF ROCK WiJk, G Geotech Test J, V3, N2, June 1980, P~9-54 Gives the theoretical background of the point load test and discusses the deperdence of the fracture force on sample geometry. The multiple point load test is reviewed together with its advantages from both the theoretical and experimental points of view. 813033 INFLUENCE OF THE BACK PRESSURE TECHNIQUE ON THE SHEAR STRENGTH OF SOILS. TECHNICAL NOTE Allam~ M M; Sridharan, A Geotech Test J, V3, NI, March 1980, P35-40 Reports a series of consolidated n ~ a i n e d triaxial tests to elucidate the effect and mechanism of the back pressure technique. It was four~ that the total stress parameters were influenced significantly, whereas the effective stress parameters were essentially unaffected. 813034 SCREW PLATE TESTING OF A SOFT CLAY Selvadurai, A P S; Bauer, G E; Nicholas. T J Can Geotech J, VI7, E~, Nov 1980, Ph65-472 The screw plate test was developed for the determination of the in situ deformability characteristics of both granular and cohesive soils. This paper examines several theoretical models that may be used to evaluate the in situ undrained deformability ani shearing strength characteristics of a cohesive soil medium from results of screw plate tests. It is shown that the urzlrained modulus and the umdrained shearing strength can be evaluated directly from the load-displacmnent response obtained fr~n the screw plate test. Auth. 813035 YIELDING AND R U I ~ IN A LACUSTRINE CLAY Baracos, A; Graham, J; Domaschuk, L Can Geotech J, VI7, N~, Nov 1980, P559"573 Recent tests have examined the properties of block samples stud tube samples from depths to 12m in Winnipeg clay. The clay is markedly anisotropic and non-h~nogeneous. At low stresses, a section of the effective stremghh envelope has been identified having a low cohesion intercept and a high "friction" angle. At in situ stress levels, the clay dilates markedly as failure is approached. Residual strer~ths are low, and are influenced by the methods used during testing. Yielding has been clearly identified for shear failure of the grain structure, but is more poorly defined for increasing naannal octahedral stresses f ~ field applications. 813036 STRESS PATH EFFECTS ON THE STRENGTH B~iAVIOUR OF A LAYERED SOIL. TECHNICAL NOTE Krishr~ Murthy, M; NagaraJ, T S; Sridharan, A Can Geotech J, V17, N~, Nov 1980, P603-607
813038 INFLUENCE OF CUTTING SHOE SIZE IN SELF-BORING PRESSUREMm'fmI~ TESTS IN SENSITIVE CLAYS Law, K T; Eden, W J Can Geotech J, VI7, N2, May 1980, P165-173 Reports tests on Leda clay in which it was four~ that an oversized cutting shoe caused the modulus and shear stre~ch to be overestimated by 30 and 80 per cent, respectively. With an undersized shoe, the shear strength was reduced at small strains. Beyond a certain strain (5 per cent), however, the cutting shoe size had little effect.
813039 UNDRAINED
STRENGTH AND STABILITY ANALYSIS FOR A QUICK SAND Hamzawa, H Soils Found, V20, N2, June 1980, P17-29
Discusses the general characteristics of a quick sand, the determimation of undrained stremgth, and a stability analysis for a breakwater in the Arabian Gulf.
Deformation characteristics See also: 813026, 813035 813o4o STRESS-PATH INFLUENCE ON DRAINED DEFORMJhTIONS OF CIAY Gargopsdhyay, C R; Das, S C; Som, N N J Geotech Emgmg Div ASCE I VI06, NGTll, Nov 1980, P1243-1260 Reports stress-path controlled triaxial tests and i n s ~ e n t e d model footing tests on artifielally sedlmemted n a r m ~ l y consolidated kaolinite, ani develops a method of settlement analysis. The method is applied to the consolidation settlement of a model footirg, and compared with other prediction methods. 813041 TESTING FOR EVALUATION OF STRESS-STRAIN BEHAVIOR OF CLAYS Yud_hbir; Jain I K K Geotech Test J, V3, N1, March 1980, P18-29 Gives a method to predict the stress-strain behaviour of clays alomg various stress paths and applies it to stress comtrolled triaxial pure shear and consolidation tests. 813042 NEW METHOD FOR THE CALIBRATION OF THE INERTIA OF RESONANT COLUMN DEVICES Tatsuoka, F; Silver, M L Geotech Test J, V3, NI, March 1980, P30-34 Describes a calibration method using 2 calibration rods of known geometry, needing no knowledge of the material properties of the calibration specimen. 813043 EFFECTS OF SAMPLING AND CONSTRUCTION STRESS
Reports lab tests on soil specimens trin~ned in vertical and herizontal directions amd sheared unier 3 different stress paths in compression and extension tests. 813037 CC~4PARISON OF UNDRAINED SHFAR STRENGTH RESULTS OBTAINED BY DIFFERENT TEST METHODS IN SOFT CLAYS Eden, W J; Law, K T Can Geotech J, VI7, N3, Aug 1980, P369-381 Reports tests using the Cambridge self-bc~ing pressuremeter and the Norwegian Geotechnieal Institute field vane apparatus at sites in the Ottawa ~ Quebec areas.
P ~ s ON ~n~ss-~Z~IN m O F m ~ I E S OF A ~ N D (IN ENGLZSH) Memzies, B K; Sutton, H Riv Ital Geotec I VI6, NI~ Jan-March 1980, I~5-62 Describes an automatic ~rogrammable triaxial test system in which a desk top computer is used to log and process test data amd to control the test to allow the simultaneous application of varying axial and radial stresses to simulate a field loading construction stress path.
813032 POINT LOAD TEST FOR THE TENSILE STRENGTH OF ROCK WiJk, G Geotech Test J, V3, N2, June 1980, P~9-54 Gives the theoretical background of the point load test and discusses the deperdence of the fracture force on sample geometry. The multiple point load test is reviewed together with its advantages from both the theoretical and experimental points of view. 813033 INFLUENCE OF THE BACK PRESSURE TECHNIQUE ON THE SHEAR STRENGTH OF SOILS. TECHNICAL NOTE Allam~ M M; Sridharan, A Geotech Test J, V3, NI, March 1980, P35-40 Reports a series of consolidated n ~ a i n e d triaxial tests to elucidate the effect and mechanism of the back pressure technique. It was four~ that the total stress parameters were influenced significantly, whereas the effective stress parameters were essentially unaffected. 813034 SCREW PLATE TESTING OF A SOFT CLAY Selvadurai, A P S; Bauer, G E; Nicholas. T J Can Geotech J, VI7, E~, Nov 1980, Ph65-472 The screw plate test was developed for the determination of the in situ deformability characteristics of both granular and cohesive soils. This paper examines several theoretical models that may be used to evaluate the in situ undrained deformability ani shearing strength characteristics of a cohesive soil medium from results of screw plate tests. It is shown that the urzlrained modulus and the umdrained shearing strength can be evaluated directly from the load-displacmnent response obtained fr~n the screw plate test. Auth. 813035 YIELDING AND R U I ~ IN A LACUSTRINE CLAY Baracos, A; Graham, J; Domaschuk, L Can Geotech J, VI7, N~, Nov 1980, P559"573 Recent tests have examined the properties of block samples stud tube samples from depths to 12m in Winnipeg clay. The clay is markedly anisotropic and non-h~nogeneous. At low stresses, a section of the effective stremghh envelope has been identified having a low cohesion intercept and a high "friction" angle. At in situ stress levels, the clay dilates markedly as failure is approached. Residual strer~ths are low, and are influenced by the methods used during testing. Yielding has been clearly identified for shear failure of the grain structure, but is more poorly defined for increasing naannal octahedral stresses f ~ field applications. 813036 STRESS PATH EFFECTS ON THE STRENGTH B~iAVIOUR OF A LAYERED SOIL. TECHNICAL NOTE Krishr~ Murthy, M; NagaraJ, T S; Sridharan, A Can Geotech J, V17, N~, Nov 1980, P603-607
813038 INFLUENCE OF CUTTING SHOE SIZE IN SELF-BORING PRESSUREMm'fmI~ TESTS IN SENSITIVE CLAYS Law, K T; Eden, W J Can Geotech J, VI7, N2, May 1980, P165-173 Reports tests on Leda clay in which it was four~ that an oversized cutting shoe caused the modulus and shear stre~ch to be overestimated by 30 and 80 per cent, respectively. With an undersized shoe, the shear strength was reduced at small strains. Beyond a certain strain (5 per cent), however, the cutting shoe size had little effect.
813039 UNDRAINED
STRENGTH AND STABILITY ANALYSIS FOR A QUICK SAND Hamzawa, H Soils Found, V20, N2, June 1980, P17-29
Discusses the general characteristics of a quick sand, the determimation of undrained stremgth, and a stability analysis for a breakwater in the Arabian Gulf.
Deformation characteristics See also: 813026, 813035 813o4o STRESS-PATH INFLUENCE ON DRAINED DEFORMJhTIONS OF CIAY Gargopsdhyay, C R; Das, S C; Som, N N J Geotech Emgmg Div ASCE I VI06, NGTll, Nov 1980, P1243-1260 Reports stress-path controlled triaxial tests and i n s ~ e n t e d model footing tests on artifielally sedlmemted n a r m ~ l y consolidated kaolinite, ani develops a method of settlement analysis. The method is applied to the consolidation settlement of a model footirg, and compared with other prediction methods. 813041 TESTING FOR EVALUATION OF STRESS-STRAIN BEHAVIOR OF CLAYS Yud_hbir; Jain I K K Geotech Test J, V3, N1, March 1980, P18-29 Gives a method to predict the stress-strain behaviour of clays alomg various stress paths and applies it to stress comtrolled triaxial pure shear and consolidation tests. 813042 NEW METHOD FOR THE CALIBRATION OF THE INERTIA OF RESONANT COLUMN DEVICES Tatsuoka, F; Silver, M L Geotech Test J, V3, NI, March 1980, P30-34 Describes a calibration method using 2 calibration rods of known geometry, needing no knowledge of the material properties of the calibration specimen. 813043 EFFECTS OF SAMPLING AND CONSTRUCTION STRESS
Reports lab tests on soil specimens trin~ned in vertical and herizontal directions amd sheared unier 3 different stress paths in compression and extension tests. 813037 CC~4PARISON OF UNDRAINED SHFAR STRENGTH RESULTS OBTAINED BY DIFFERENT TEST METHODS IN SOFT CLAYS Eden, W J; Law, K T Can Geotech J, VI7, N3, Aug 1980, P369-381 Reports tests using the Cambridge self-bc~ing pressuremeter and the Norwegian Geotechnieal Institute field vane apparatus at sites in the Ottawa ~ Quebec areas.
P ~ s ON ~n~ss-~Z~IN m O F m ~ I E S OF A ~ N D (IN ENGLZSH) Memzies, B K; Sutton, H Riv Ital Geotec I VI6, NI~ Jan-March 1980, I~5-62 Describes an automatic ~rogrammable triaxial test system in which a desk top computer is used to log and process test data amd to control the test to allow the simultaneous application of varying axial and radial stresses to simulate a field loading construction stress path.