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Investigation of toppling slope failures in welded ash flow tuff at Glennies Creek Dam, New South Wales
87A 892292 lsanlu Dam, Nigeria Berry. N S M; Eadie. H S: MacGregor. I R lnst Civ Engrs Proc V84, Part 1. Oct 1988, P875-894
892296 Viscous-type sliding laws for landslides Vulliet, L; Hutter, K Can Geotech J V25, N3. Aug 1988. P467-477
Design and construction of [sanlu dam are presented. Site investigation showed the area to be comprised of weathered and fractured granite and gneiss, and this, along with the shortage of natural materials, led to choice of a rock fill dam. Embankment design is outlined and properties of the high density polyethylene (HDPE) membrane used are discussed. Construction, including grouting, rock fill installation and laying of membrane, is described.
The sliding of a soil mass is analysed with attention focused on constitutive modelling of the zone adjacent to the sliding surface. Possible rate sensitive constitutive equations are examined and a viscous type sliding law presented, which relates sliding velocity at the interface to state of stress at this surface. The suitability of this approach is demonstrated by comparing its predictions to measured landslide movements.
892293 Evaluating the design of an earth dam by finite element analysis. Technical note on practical applications De Wet, M; Hugo, F lnt J Num Anal Afeth Geomech VI2. N5, Sept-Oct 1988, P573-578 An earth dam was to be constructed on a site with non-uniform foundation conditions. The most prominent feature was a vertical contact between unweathered quartzite and decomposed diabase running parallel to the valley. A 2-D finite element analysis on the foundation and the core was used to determine relative settlements and the possibility of hydraulic fracturing of the clay core. The analysis also evaluated effectiveness of site improvement measures such as excavation and recompaction of the decomposed diabase, and elimination of the contact problem by blasting into the unweathered quartzite. Auth.
892294 Lateral load analysis of nonlinear piles: note Kramcr, S L; Heavey, E J J Geotech Engng Dit, ASCE VII4, Ng. Sept 1988, P10451049 A method to account for nonlinear pile bchaviour in the analysis of laterally loaded piles has been developed. It is illustrated using data from lateral loading of an aged drilled shaft, showing the method to be capable of predicting lateral load response of nonlinear piles.
Hydraulic structures 892295 Groundwater flow with phreatic line as a non-stationary process Hjortnaes-Pedersen, A G I: Teunissen, J A M; Best, H Proc ECONMIG 86, Stuttgart, 16-18 Sept 1986 V2. 14P. Publ Stuttgart: Unirersity of Stuttgart. 1986 A numerical program, STEENZET/2, is presented, which has been developed to model the hydraulic behaviour of a block revetment on sand, subjected to wave action. It includes Darcy and turbulent flow, the phreatic surface, and elastic storage, assuming no consolidation. Results of the program are compared to those of an analytical solution and large scale model tests.
Slopes See also." 892007. 892067. 892069. 892070, 892095. 892171,
892297 Complex nature of creep movements on steeply sloping ground in southern Rwanda Moeyersons, J Earth Surf Process Land VI3, N6, Sept 1988, P511-524 Slope creep can be seasonal, influenced by cyclic changes in soil temperature and moisture, vegetation or land use, or continuous, gravity driven. Velocity profile measurements were made in Young-pits on a hillside in Rwanda with a thick (2040cm) humic horizon over kaolinitic red earth, separated by a transitional region. An improved method of creep movement measurement was employed. Complex creep behaviour, likened to turbulent flow. was evident, with the humic layer creeping steadily over a subsoil affected by more irregular creep deformation.
892298 Slope stability analyses for materials with a non-linear failure envelope Collins, I F; Gunn, C I M; Pender, M J; Wang Yan Int J Num Anal ~ldeth Geomech VI2, N5. Sept-Oct 1988, P535-550 It is demonstrated that upper bound limit analysis techniques can be used to estimate slope stability of closely fractured rocks whose failure is governed by nonlinear failure envelopes. A simple procedure which minimises the stability factor for a given nonlinear failure criterion is developed. Results are close to those obtained in more exact but computationally complex analyses. Back analysis using this system inversely yields conservative values of material strength. Specific results are presented for the material model proposed by Hock and Brown.
892299 Investigation of toppling slope failures in welded ash flow tuff at Glennies Creek Dam, New South Wales Woodward, g C Q J Engng Geoi V21. N4, 1988, P289-298 The spillway for Glennies Creek Dam was cut in welded tuff. Toppling failure led to a geological investigation in which joint orientation, spacing, persistence, in situ aperture and shear strength parameters were determined using drill cores, geological maps, trial blasts and laboratory tests. Results show that toppling failure was possible due to removal of column toe support by plane sliding movements on joints dipping towards the cut. This sliding was induced by blasting nearby.
:~'. 1989 Pergamon Press plc. Reproduction not permitted
892296 Viscous-type sliding laws for landslides Vulliet, L; Hutter, K Can Geotech J V25, N3. Aug 1988. P467-477
Design and construction of [sanlu dam are presented. Site investigation showed the area to be comprised of weathered and fractured granite and gneiss, and this, along with the shortage of natural materials, led to choice of a rock fill dam. Embankment design is outlined and properties of the high density polyethylene (HDPE) membrane used are discussed. Construction, including grouting, rock fill installation and laying of membrane, is described.
The sliding of a soil mass is analysed with attention focused on constitutive modelling of the zone adjacent to the sliding surface. Possible rate sensitive constitutive equations are examined and a viscous type sliding law presented, which relates sliding velocity at the interface to state of stress at this surface. The suitability of this approach is demonstrated by comparing its predictions to measured landslide movements.
892293 Evaluating the design of an earth dam by finite element analysis. Technical note on practical applications De Wet, M; Hugo, F lnt J Num Anal Afeth Geomech VI2. N5, Sept-Oct 1988, P573-578 An earth dam was to be constructed on a site with non-uniform foundation conditions. The most prominent feature was a vertical contact between unweathered quartzite and decomposed diabase running parallel to the valley. A 2-D finite element analysis on the foundation and the core was used to determine relative settlements and the possibility of hydraulic fracturing of the clay core. The analysis also evaluated effectiveness of site improvement measures such as excavation and recompaction of the decomposed diabase, and elimination of the contact problem by blasting into the unweathered quartzite. Auth.
892294 Lateral load analysis of nonlinear piles: note Kramcr, S L; Heavey, E J J Geotech Engng Dit, ASCE VII4, Ng. Sept 1988, P10451049 A method to account for nonlinear pile bchaviour in the analysis of laterally loaded piles has been developed. It is illustrated using data from lateral loading of an aged drilled shaft, showing the method to be capable of predicting lateral load response of nonlinear piles.
Hydraulic structures 892295 Groundwater flow with phreatic line as a non-stationary process Hjortnaes-Pedersen, A G I: Teunissen, J A M; Best, H Proc ECONMIG 86, Stuttgart, 16-18 Sept 1986 V2. 14P. Publ Stuttgart: Unirersity of Stuttgart. 1986 A numerical program, STEENZET/2, is presented, which has been developed to model the hydraulic behaviour of a block revetment on sand, subjected to wave action. It includes Darcy and turbulent flow, the phreatic surface, and elastic storage, assuming no consolidation. Results of the program are compared to those of an analytical solution and large scale model tests.
Slopes See also." 892007. 892067. 892069. 892070, 892095. 892171,
892297 Complex nature of creep movements on steeply sloping ground in southern Rwanda Moeyersons, J Earth Surf Process Land VI3, N6, Sept 1988, P511-524 Slope creep can be seasonal, influenced by cyclic changes in soil temperature and moisture, vegetation or land use, or continuous, gravity driven. Velocity profile measurements were made in Young-pits on a hillside in Rwanda with a thick (2040cm) humic horizon over kaolinitic red earth, separated by a transitional region. An improved method of creep movement measurement was employed. Complex creep behaviour, likened to turbulent flow. was evident, with the humic layer creeping steadily over a subsoil affected by more irregular creep deformation.
892298 Slope stability analyses for materials with a non-linear failure envelope Collins, I F; Gunn, C I M; Pender, M J; Wang Yan Int J Num Anal ~ldeth Geomech VI2, N5. Sept-Oct 1988, P535-550 It is demonstrated that upper bound limit analysis techniques can be used to estimate slope stability of closely fractured rocks whose failure is governed by nonlinear failure envelopes. A simple procedure which minimises the stability factor for a given nonlinear failure criterion is developed. Results are close to those obtained in more exact but computationally complex analyses. Back analysis using this system inversely yields conservative values of material strength. Specific results are presented for the material model proposed by Hock and Brown.
892299 Investigation of toppling slope failures in welded ash flow tuff at Glennies Creek Dam, New South Wales Woodward, g C Q J Engng Geoi V21. N4, 1988, P289-298 The spillway for Glennies Creek Dam was cut in welded tuff. Toppling failure led to a geological investigation in which joint orientation, spacing, persistence, in situ aperture and shear strength parameters were determined using drill cores, geological maps, trial blasts and laboratory tests. Results show that toppling failure was possible due to removal of column toe support by plane sliding movements on joints dipping towards the cut. This sliding was induced by blasting nearby.
:~'. 1989 Pergamon Press plc. Reproduction not permitted