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Landslide studies in the Eastern Dolomites Mountains, Italy
107A 942366 Geot~eehn_'~eniproblems in designing waste dumps on soft soils Vrkljan, I; Ortolan, Z; Petras, J Peoc 6tb International Symposium o n Landslides, Christchurch, 10-14 February 1992 V1, P255-262. Publ Rotterdam: A A Balkema, 1992 About 25M ubic metres of steelworks waste has been dumped at a site in the Raca River Valley in Croatia since 1984. The foundations are on a slope where 2-8m of clay overlies weathered bedrock. Geotechnical and geological studies of the materials involved were carried out. Limit equilibrium stability analysis and determination of the shear strength of potential failure surfaces were undertaken. The dump was planned considering dump height, drainage, and scheduling of disposal. 942367 Relationship between the origin of loess landslide and the h m a n activities in China Wang Gongxian Proe 6tb International Symposium on Landslides, Christchurch, 10-14 February 1992 V1, P263-266. Publ Rotterdam: A A Balkema, 1992 Loessial soils are widely distributed in western China. Landslide frequency in the soils has increased with increasing human development of the area. The slide types found and their associated engineering geological features are described. Failure triggers have been identified: seismicity, rainfall, erosion (natural), and toe excavation, upslope loading, irrigation, water leakage, mining collapse, and deforestation (artificial). Control measures in the long term are revegetation and erosion control, and management of excavations and surface waters.
may be necessary to detect the additional rate of water flow coming from upper reaches and possibly responsible for slope failure. 942370 Evaluation of stability of high slopes based on determining of the initial zone of failure Asilbekov, D A; Ismagulov, I K Proc 6th International Symposium o n Landslides, Christchurch, 10-14 February 1992 VI, P289-293. Publ Rotterdam: A A Balkema, 1992 Model tests in a geotechnical centrifuge have been used to study initiation of slope failure under static loads. Initiation occurs in the slope toe. A stability criterion for non-admission of the failure condition at the toe allows definition of a safety factor for cohesive soil slopes in terms of ratio of shear strength to tangent of slope angle at the toe position. Three ways to calculate the position of initial failure are presented and evaluated against data for a suite of landslides. 942371 Finite element study of an excavated slope Axelsson, K; Yu, Y; Johansson, L Proc 6th International Symposium on Landslides, Christchurch, 10-14 February 1992 V1, P295-300. Publ Rotterdam: A A Balkema, 1992 Failure of an instrumented slope in clay soil has been modelled using the computer code ABAQUS. The slope was excavated in 8 steps over 3 years to depth 8m and gradient 1:2. A load of 20MPa was applied at slope top at stage 2. Total stress and effective stress analyses were carried out with emphasis on evaluation of suitable soil parameters for the chosen soil models. Calculated values of horizontal displacements and excess pore pressures are compared with those measured.
942368 Long term slope deformations in the granitic rocks of the Sierra Nevada, California and Nevada, USA Watters, R J Proe 6th International Symposium on Landslides, Christchurch, 10-14 February 1992 VI, P267-272. Publ Rotterdam: A A Baikema, 1992
942372 Reach of slope failures Aydan, O; Shimizu, Y; Kawamoto, T Proc 6tb International Symposium on Landslides, Christchurch, 10-14 February 1992 V1, P301-306. Publ Rotterdam: A A Balkema, 1992
The Sierra Nevada batholith has experienced glaciation, weathering and tectonic uplift, with consequent stress relief and steeping of valley slopes. Two types of slope instability are examined which show the effects of long term deformation, stress relief, and stored strain energy. Rock slab buckling is induced by very high horizontal stresses. Glacial oversteepening of valleys and the development of antiscarps on the deforming surfaces also leads to landslides. These failures have common features in that they both occur in high alpine regions and involve granitic rocks.
Structures such as nuclear power stations must be located sufficiently far from high slopes such that no damage can occur in the event of slope failure. A systematic investigation of parameters affecting the reach of slopes has been undertaken. Slope geometry, basal surface geometry, basal surface dynamic frictional properties, failure mode, and discontinuous nature of the rock mass have been closely examined. Case studies from the literature have been re-examined and field observations compared with predictions from the above analysis and model test data.
942369 Landsfide studies in the Eastern Dolomites Mountains, Italy Angeli, M G; Menotti, R M; Pasuto, A; Silvano, S Prne 6tk International Symposium on Landslides, Christchurch, 10-14 February 1992 VI, P275-282. Publ Rotterdam: A A Balkema, 1992
9423?3 In situ observation of roekfall analysis parameters Azzoni, A; Rossi, P P; Drigo, E; Giani, G P, Zaninetti, A Proc 6th International Symposium on Landslides, Christchurch, 10-14 February 1992 V1, P307-314. Publ Rotterdam: A A Balkema, 1992
The geological profile of the Eastern Dolomites is outlined and four landslide ease studies (Ru Di Roccia, Ru Della Roe, Giau, Staulin) are examined in detail. Long term climatic and meteorological data are available, but no direct relation is found between critical climatic periods and landslide reactivation for these cases. Most activity is in the lower parts of drainage basins which are supplied with large amounts of water throughout the year. Monitoring over very large areas
Blocks detached from unstable rock slopes can have free falling, bouncing,or rolling and sliding motion. Field experimental work is described in which blocks were thrown, their falls recorded using video cameras, and the digitized images computer analysed. Equation of motion parameters for each type of movement have been determined. Influences of block shape, size and mechanical features and of the nature and geometry of the ground have been studied.
may be necessary to detect the additional rate of water flow coming from upper reaches and possibly responsible for slope failure. 942370 Evaluation of stability of high slopes based on determining of the initial zone of failure Asilbekov, D A; Ismagulov, I K Proc 6th International Symposium o n Landslides, Christchurch, 10-14 February 1992 VI, P289-293. Publ Rotterdam: A A Balkema, 1992 Model tests in a geotechnical centrifuge have been used to study initiation of slope failure under static loads. Initiation occurs in the slope toe. A stability criterion for non-admission of the failure condition at the toe allows definition of a safety factor for cohesive soil slopes in terms of ratio of shear strength to tangent of slope angle at the toe position. Three ways to calculate the position of initial failure are presented and evaluated against data for a suite of landslides. 942371 Finite element study of an excavated slope Axelsson, K; Yu, Y; Johansson, L Proc 6th International Symposium on Landslides, Christchurch, 10-14 February 1992 V1, P295-300. Publ Rotterdam: A A Balkema, 1992 Failure of an instrumented slope in clay soil has been modelled using the computer code ABAQUS. The slope was excavated in 8 steps over 3 years to depth 8m and gradient 1:2. A load of 20MPa was applied at slope top at stage 2. Total stress and effective stress analyses were carried out with emphasis on evaluation of suitable soil parameters for the chosen soil models. Calculated values of horizontal displacements and excess pore pressures are compared with those measured.
942368 Long term slope deformations in the granitic rocks of the Sierra Nevada, California and Nevada, USA Watters, R J Proe 6th International Symposium on Landslides, Christchurch, 10-14 February 1992 VI, P267-272. Publ Rotterdam: A A Baikema, 1992
942372 Reach of slope failures Aydan, O; Shimizu, Y; Kawamoto, T Proc 6tb International Symposium on Landslides, Christchurch, 10-14 February 1992 V1, P301-306. Publ Rotterdam: A A Balkema, 1992
The Sierra Nevada batholith has experienced glaciation, weathering and tectonic uplift, with consequent stress relief and steeping of valley slopes. Two types of slope instability are examined which show the effects of long term deformation, stress relief, and stored strain energy. Rock slab buckling is induced by very high horizontal stresses. Glacial oversteepening of valleys and the development of antiscarps on the deforming surfaces also leads to landslides. These failures have common features in that they both occur in high alpine regions and involve granitic rocks.
Structures such as nuclear power stations must be located sufficiently far from high slopes such that no damage can occur in the event of slope failure. A systematic investigation of parameters affecting the reach of slopes has been undertaken. Slope geometry, basal surface geometry, basal surface dynamic frictional properties, failure mode, and discontinuous nature of the rock mass have been closely examined. Case studies from the literature have been re-examined and field observations compared with predictions from the above analysis and model test data.
942369 Landsfide studies in the Eastern Dolomites Mountains, Italy Angeli, M G; Menotti, R M; Pasuto, A; Silvano, S Prne 6tk International Symposium on Landslides, Christchurch, 10-14 February 1992 VI, P275-282. Publ Rotterdam: A A Balkema, 1992
9423?3 In situ observation of roekfall analysis parameters Azzoni, A; Rossi, P P; Drigo, E; Giani, G P, Zaninetti, A Proc 6th International Symposium on Landslides, Christchurch, 10-14 February 1992 V1, P307-314. Publ Rotterdam: A A Balkema, 1992
The geological profile of the Eastern Dolomites is outlined and four landslide ease studies (Ru Di Roccia, Ru Della Roe, Giau, Staulin) are examined in detail. Long term climatic and meteorological data are available, but no direct relation is found between critical climatic periods and landslide reactivation for these cases. Most activity is in the lower parts of drainage basins which are supplied with large amounts of water throughout the year. Monitoring over very large areas
Blocks detached from unstable rock slopes can have free falling, bouncing,or rolling and sliding motion. Field experimental work is described in which blocks were thrown, their falls recorded using video cameras, and the digitized images computer analysed. Equation of motion parameters for each type of movement have been determined. Influences of block shape, size and mechanical features and of the nature and geometry of the ground have been studied.