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Statistical procedures for characterizing rock properties
51~ 872048 Engineering properties of weathered rock profiles in peninsular Malaysia Komoo, I Proc 8th Southeast Asian Geotechnical Conference, Kuala Lumpur, t~lalaysia, 11-15 ~Vlarch 1985 VI. P3:81-86. Publ Kuala Lumpur: Organising Committee, 1986
872052 Directional shear experiments and stre~ induced anisotropy in soil Ontuna, A K; Budiman, J S: Sture, $: Ko. H Y Proc 5th Engineering Mechanics Division Speciali O" Conference, Wyoming, 1-3 Aug 1984 V2. P1312-1315. Publ New York: ASCE, 1984
Weathering profiles of sedimentary and granitic rocks in peninsular Malaysia have been established. The relationship of some basic physical properties (density, porosity, void ratio, water content, Atterberg limits, grain size distribution) and some mechanical properties (shear strength, unconfined compressive strength, cohesion, friction angle) with the degree of weathering is discussed. The positive trend between weathering and mechanical properties suggests that the weathering profile approach may be used as a cost effective method of site investigation for determining design parameters.
A new directional shear cell is described, which is used to investigate the behaviour of cohesive and cohcsionless soils under complex loading states relating to stress induced anisotropy. It is shown that stiffness moduli are significantly affected by discrete and continuously changing principal stress direction and magnitude.
872049 Statistical procedures for characterizing rock properties Yegulalp, T M; Mahtab, M A; Wane, M T Proc Symposium on Application of Rock Characterisation Techniques in Mine Design, New Orleans, AIarch 1986 P2432. Publ Littleton : AIME, 1986 The use of statistical procedures for quanti~ing the important rock properties - deformability, strength, geometry of rock joints, in situ stress and permeability - is discussed. The most fundamental questions relating to variability in rock property test results and the ensuing uncertainty in the design input are examined. Subsequent sections give a brief review of the statistical procedures used for quantifying the important rock properties, implications of the statistical qualification for design, and recommendations for further work.
872050 Selecting design strength of granular fills. Technical note Bolton, M D Proc Symposium on Failures in Earthworks, London, 6-7 March 1985 P461-463. Publ London: Thomas Telford, 1985 Localised slip displacements of 5-10 particle diameters cause the angle of shearing resistance of dense sands to fall from about 50 deg to the critical state value around 33 deg. Previous and recent research on models is analysed and a number of recommendations made concerning the design strength of fills in relation to their particle size.
872051 Experimental and analytical modeling of stress induced anisotropy in sand Mould, J C; Sture, S; Ko, H Y Proc 5th Engineering Mechanics Division Speciafity Conference, Wyoming, 1-3 Aug 1984 V2, P1308-1311. Publ New York: ASCE, 1984 For the solution of geotechnical problems including stress induced anisotropy, both mathematical models to accurately reproduce soil behaviour under field loading conditions, and laboratory techniques to identify and quantify the behaviour and calibrate the models are required. Multiaxial cubical apparatus, the specimen preparation and experimental techniques used to validate a multisurface elastic-plastic soil model (Mroz-Iwan-Prevost) for dense Leighton Buzzard sand are described.
872053 Measurement of cyclic interface response Drumm, E C; Desai, C S; Zaman, M M Proc 5th Engineering Mechanics Dirision Speciality Conference, Wyoming, 1-3 Aug 1984 ['2, P1345-1348. P,~bl New York: ASCE, 1984 The CYclic Multi-Degree-Of-Freedom (CYMDOF) shear testing machine has been developed to study the stress-deformation behaviour of interfaces under a variety of loading conditions. Results of tests on a sand-concrete interface are presented. The cyclic responses are seen to be a function of stress and deformation amplitude, normal stress across the interface, number of loading cycles and the initial density of the sand. Results can be used to develop constitutive relations for interfaces.
872054 Characterization of a diatomaceous mudstone by elastoviscoplasticity Sekiguchi, H; Nishida, Y; Matsumoto, T; Vesawa. M Proc 5th International Conference on Numerical Alethods in Geomechanics, Nagoya, 1-5 April 1985 V1. P437-444. Publ Rotterdam: A. A. Balkema, 1985 A behavioural framework is developed for a diatomaceous mudstone from Noto Peninsula, Japan. The mudstone is a naturally cemented, stiff, intact material having a high void ratio. The consequence of this upon yielding, strength and consolidation (including secondary compression) characteristics is discussed on the basis of triaxial test results. Furthermore, the progress of isotropic consolidation straddling the apparent preconsolidation pressure is analyzed with consideration of secondary compression and compared with experimental performance.
872055 Constitutive equation of rock mass including strain softening Kusabuka, M; Hamajima, R; Gutierrez, V; Yamashita, K; Kawai, T Proc 5th International Conference on Numerical Alethods in Geomechanics, Nagoya, 1-5 April 1985 VI, P463-468. Publ Rotterdam: A. A. Balkema, 1985 This study deals with various tests with special emphasis on crack propagation and characteristics of strain softening as well as dilatancy. It also investigates a constitutive equation for a rock mass based on the test results.
© 1986 Pergamon Journals Ltd. Reproduction not permitted
872052 Directional shear experiments and stre~ induced anisotropy in soil Ontuna, A K; Budiman, J S: Sture, $: Ko. H Y Proc 5th Engineering Mechanics Division Speciali O" Conference, Wyoming, 1-3 Aug 1984 V2. P1312-1315. Publ New York: ASCE, 1984
Weathering profiles of sedimentary and granitic rocks in peninsular Malaysia have been established. The relationship of some basic physical properties (density, porosity, void ratio, water content, Atterberg limits, grain size distribution) and some mechanical properties (shear strength, unconfined compressive strength, cohesion, friction angle) with the degree of weathering is discussed. The positive trend between weathering and mechanical properties suggests that the weathering profile approach may be used as a cost effective method of site investigation for determining design parameters.
A new directional shear cell is described, which is used to investigate the behaviour of cohesive and cohcsionless soils under complex loading states relating to stress induced anisotropy. It is shown that stiffness moduli are significantly affected by discrete and continuously changing principal stress direction and magnitude.
872049 Statistical procedures for characterizing rock properties Yegulalp, T M; Mahtab, M A; Wane, M T Proc Symposium on Application of Rock Characterisation Techniques in Mine Design, New Orleans, AIarch 1986 P2432. Publ Littleton : AIME, 1986 The use of statistical procedures for quanti~ing the important rock properties - deformability, strength, geometry of rock joints, in situ stress and permeability - is discussed. The most fundamental questions relating to variability in rock property test results and the ensuing uncertainty in the design input are examined. Subsequent sections give a brief review of the statistical procedures used for quantifying the important rock properties, implications of the statistical qualification for design, and recommendations for further work.
872050 Selecting design strength of granular fills. Technical note Bolton, M D Proc Symposium on Failures in Earthworks, London, 6-7 March 1985 P461-463. Publ London: Thomas Telford, 1985 Localised slip displacements of 5-10 particle diameters cause the angle of shearing resistance of dense sands to fall from about 50 deg to the critical state value around 33 deg. Previous and recent research on models is analysed and a number of recommendations made concerning the design strength of fills in relation to their particle size.
872051 Experimental and analytical modeling of stress induced anisotropy in sand Mould, J C; Sture, S; Ko, H Y Proc 5th Engineering Mechanics Division Speciafity Conference, Wyoming, 1-3 Aug 1984 V2, P1308-1311. Publ New York: ASCE, 1984 For the solution of geotechnical problems including stress induced anisotropy, both mathematical models to accurately reproduce soil behaviour under field loading conditions, and laboratory techniques to identify and quantify the behaviour and calibrate the models are required. Multiaxial cubical apparatus, the specimen preparation and experimental techniques used to validate a multisurface elastic-plastic soil model (Mroz-Iwan-Prevost) for dense Leighton Buzzard sand are described.
872053 Measurement of cyclic interface response Drumm, E C; Desai, C S; Zaman, M M Proc 5th Engineering Mechanics Dirision Speciality Conference, Wyoming, 1-3 Aug 1984 ['2, P1345-1348. P,~bl New York: ASCE, 1984 The CYclic Multi-Degree-Of-Freedom (CYMDOF) shear testing machine has been developed to study the stress-deformation behaviour of interfaces under a variety of loading conditions. Results of tests on a sand-concrete interface are presented. The cyclic responses are seen to be a function of stress and deformation amplitude, normal stress across the interface, number of loading cycles and the initial density of the sand. Results can be used to develop constitutive relations for interfaces.
872054 Characterization of a diatomaceous mudstone by elastoviscoplasticity Sekiguchi, H; Nishida, Y; Matsumoto, T; Vesawa. M Proc 5th International Conference on Numerical Alethods in Geomechanics, Nagoya, 1-5 April 1985 V1. P437-444. Publ Rotterdam: A. A. Balkema, 1985 A behavioural framework is developed for a diatomaceous mudstone from Noto Peninsula, Japan. The mudstone is a naturally cemented, stiff, intact material having a high void ratio. The consequence of this upon yielding, strength and consolidation (including secondary compression) characteristics is discussed on the basis of triaxial test results. Furthermore, the progress of isotropic consolidation straddling the apparent preconsolidation pressure is analyzed with consideration of secondary compression and compared with experimental performance.
872055 Constitutive equation of rock mass including strain softening Kusabuka, M; Hamajima, R; Gutierrez, V; Yamashita, K; Kawai, T Proc 5th International Conference on Numerical Alethods in Geomechanics, Nagoya, 1-5 April 1985 VI, P463-468. Publ Rotterdam: A. A. Balkema, 1985 This study deals with various tests with special emphasis on crack propagation and characteristics of strain softening as well as dilatancy. It also investigates a constitutive equation for a rock mass based on the test results.
© 1986 Pergamon Journals Ltd. Reproduction not permitted