VOLCANIC ROCKS AND SOILS

By PAUL PEREZ

MECHANICAL BEHAVIOR OF VOLCANIC ROCKS FROM MICRO TO MACRO: AN INVESTIGATION OF THE GEOMECHANICAL BEHAVIOUR OF PUMICE SAND CLIMATIC EFFECTS ON PORE-WATER PRESSURE, DEFORMATION AND STRESS MOBILIZATION OF A VEGETATED VOLCANIC SOIL SLOPE IN HONG KONG UNSTABLE GEOTECHNICAL PROBLEMS OF COLUMNAR JOINTED ROCK MASS AND VOLCANIC TUFF SOIL INDUCED BY UNDERGROUND EXCAVATION: A CASE STUDY IN THE BAIHETAN HYDROPOWER STATION, CHINA SESSION 1: STRUCTURAL FEATURES OF VOLCANIC MATERIALS A MICRO- AND MACRO-SCALE INVESTIGATION OF THE GEOTECHNICAL PROPERTIES OF A PYROCLASTIC FLOW DEPOSIT OF THE COLLI ALBANI NEW GEOTECHNICAL CLASSIFICATION PROPOSED FOR LOW DENSITY PYROCLASTIC ROCKS ALTERATION OF VOLCANIC ROCKS ON THE GEOTHERMAL FIELDS OF KURIL-KAMCHATKA ARC HYDROTHERMALLY ALTERED ROCKS AS A FIELD OF DANGEROUS SLOPE PROCESSES (THE GEYSERS VALLEY, KAMCHATKA PENINSULA, RUSSIA) EFFECTS OF COMPACTION CONDITIONS ON UNDRAINED STRENGTH AND ARRANGEMENTS OF SOIL PARTICLES FOR SHIKOTSU VOLCANIC SOIL SESSION 2: MECHANICAL BEHAVIOUR OF VOLCANIC ROCKS MICROSTRUCTURAL FEATURES AND STRENGTH PROPERTIES OF WEAK PYROCLASTIC ROCKS FROM CENTRAL ITALY COMPRESSIBILITY OF GEOTHERMAL RESERVOIR ROCKS FROM THE WAIRAKEI–TAUHARA FIELDS WITH INSIGHTS GAINED FROM GEOTECHNICAL LABORATORY TESTING AND SCANNING ELECTRON MICROSCOPE IMAGING GEOMECHANICAL CHARACTERIZATION OF DIFFERENT LITHOFACIES OF THE CUITZEO IGNIMBRITES TRIAXIAL AND SHEAR BOX TESTS ON A PYROCLASTIC SOFT ROCK FAILURE CRITERION FOR LOW DENSITY PYROCLASTS RELATIONSHIP BETWEEN THE ISOTROPIC COLLAPSE PRESSURE AND THE UNIAXIAL COMPRESSIVE STRENGTH, AND DEPTH OF COLLAPSE, BOTH DERIVED FROM A NEW FAILURE CRITERION FOR LOW DENSITY PYROCLASTS CORRELATION BETWEEN THE ISOTROPIC COLLAPSE PRESSURE AND THE UNIT WEIGHT FOR LOW DENSITY PYROCLASTS UNDERGROUND CAVERNS IN VOLCANIC ROCKS: GEOLOGICAL ASPECTS AND ASSOCIATED GEOTECHNICAL BEHAVIOUR OF PYROCLASTIC ROCKS SESSION 3: MECHANICAL BEHAVIOUR OF VOLCANIC SOILS ONE-DIMENSIONAL COMPRESSION OF VOLCANIC ASH OF MOUNT ETNA GEOTECHNICAL CHARACTERIZATION OF MOUNT ETNA ASH FOR ITS REUSE PRESERVING HUMAN HEALTH GEOTECHNICAL ISSUES CONCERNING THE MATERIAL REMOVAL AND REUSE OF PYROCLASTIC SOILS VS MEASUREMENTS IN VOLCANIC URBAN AREAS FROM AMBIENT NOISE RAYLEIGH WAVES COLLAPSE-UPON-WETTING BEHAVIOUR OF A VOLCANIC SOIL EXPERIMENTAL INVESTIGATION AND CONSTITUTIVE MODELLING FOR AN UNSATURATED PYROCLASTIC SOIL SHEAR STRENGTH OF A PYROCLASTIC SOIL MEASURED IN DIFFERENT TESTING DEVICES EXPERIMENTAL STUDY ON THE SHEAR MODULI OF VOLCANIC SOIL WITH VARIOUS FINES CONTENT ON EQUIVALENT GRANULAR VOID RATIO A LABORATORY INVESTIGATION ON THE CYCLIC LIQUEFACTION RESISTANCE OF PYROCLASTIC SOILS EXPERIMENTAL EVALUATION OF LIQUEFACTION RESISTANCE FOR VOLCANIC COARSE-GRAINED SOIL IN COLD REGION USING TEMPERATURE- AND/OR MOISTURE-CONTROLLED TRIAXIAL APPARATUS ONE-DIMENSIONAL CONSOLIDATION OF UNSATURATED PYROCLASTIC SOILS: THEORETICAL ANALYSIS AND EXPERIMENTAL RESULTS A NEW RHEOMETER FOR MUD AND DEBRIS FLOW HYDRAULIC CHARACTERIZATION OF AN UNSATURATED PYROCLASTIC SLOPE BY IN SITU MEASUREMENTS THE BEHAVIOUR OF HONG KONG VOLCANIC SAPROLITES IN ONE-DIMENSIONAL COMPRESSION MICROSTRUCTURE INSIGHTS IN MECHANICAL IMPROVEMENT OF A LIME-STABILISED PYROCLASTIC SOIL DYNAMICS OF VOLCANIC SAND THROUGH RESONANT COLUMN AND CYCLIC TRIAXIAL TESTS SESSION 4: GEOTECHNICAL ASPECTS OF NATURAL HAZARDS GEOLOGICAL EVOLUTION OF THE ISCHIA VOLCANIC COMPLEX (NAPLES BAY, TYRRHENIAN SEA) BASED ON SUBMARINE SEISMIC REFLECTION PROFILES INVESTIGATION ON THE HYDRAULIC HYSTERESIS OF A PYROCLASTIC DEPOSIT AN INVESTIGATION OF INFILTRATION AND DEFORMATION PROCESSES IN LAYERED SMALL-SCALE SLOPES IN PYROCLASTIC SOILS RAINFALL-INDUCED SLOPE INSTABILITIES IN PYROCLASTIC SOILS: THE CASE STUDY OF MOUNT ALBINO (CAMPANIA REGION, SOUTHERN ITALY) GEOTECHNICAL CHARACTERIZATION AND SEISMIC SLOPE STABILITY OF ROCK SLOPES IN THE PORT HILLS DURING THE NEW ZEALAND 2011 CANTERBURY EARTHQUAKES HIGH-RESOLUTION GEOLOGICAL MODEL OF THE GRAVITATIONAL DEFORMATION AFFECTING THE WESTERN SLOPE OF MT EPOMEO (ISCHIA) GEO-ENGINEERING CONTRIBUTIONS TO IMPROVE VOLCANIC ROCK AND SOIL SLOPES STABILIZATION WAVE EROSION MECHANISM OF VOLCANIC EMBANKMENT SUBJECTED TO CYCLIC LOADINGS EARTHQUAKE-INDUCED FLOW-TYPE SLOPE FAILURES IN VOLCANIC SANDY SOILS AND TENTATIVE EVALUATION OF THE FLUIDIZATION PROPERTIES OF SOILS ROCK FALL INSTABILITIES AND SAFETY OF VISITORS IN THE HISTORIC ROCK CUT MONASTERY OF VARDZIA (GEORGIA) INTEGRATION OF GEOTECHNICAL MODELING AND REMOTE SENSING DATA TO ANALYZE THE EVOLUTION OF AN ACTIVE VOLCANIC AREA: THE CASE OF THE NEW SOUTH EAST CRATER (MOUNT ETNA) NEW MAPPING TECHNIQUES ON COASTAL VOLCANIC ROCK PLATFORMS USING UAV LIDAR SURVEYS IN PICO ISLAND, AZORES (PORTUGAL) CYCLICAL SUCTION CHARACTERISTICS IN UNSATURATED SLOPES SESSION 5: GEOTECHNICAL PROBLEMS OF ENGINEERING STRUCTURES THE APPLICATION OF GROUTING TECHNIQUE TO VOLCANIC ROCKS AND SOILS, TO SOLVE TWO DIFFICULT TUNNELLING PROBLEMS STUDY ON VOLCANIC SEDIMENT EMBANKMENT COLLAPSE IN THE 2011 EARTHQUAKE OFF THE PACIFIC COAST OF TOHOKU NUMERICAL ANALYSIS OF EFFECTS OF WATER LEAKAGE WITH LOSS OF FINES ON CONCRETE TUNNEL LINING EXCAVATIONS IN THE NEAPOLITAN SUBSOIL: THE EXPERIENCE OF THE TOLEDO STATION SERVICE TUNNEL PARTIAL REACTIVATION OF A DGSD OF IGNIMBRITE AND TUFF IN AN ALPINE GLACIAL VALLEY IN NORTHERN ITALY VERTICAL BEARING MECHANISM OF PILE FOUNDATION IN VOLCANIC ASH SOIL