Optimisation of cushion materials for rockfall protection galleries:
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| Format: | Book |
| Language: | English |
| Published: |
Zürich
Vdf, Hochsch.-Verl. an der ETH
2007
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| Series: | Veröffentlichungen des Instituts für Geotechnik (IGT) der ETH Zürich
227 |
| Subjects: | |
| Online Access: | Inhaltsverzeichnis |
| Item Description: | Zugl.: Zürich, ETH, Diss. |
| Physical Description: | XIV, 260 S. Ill., graph. Darst. |
| ISBN: | 9783728131645 3728131644 |
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| 245 | 1 | 0 | |a Optimisation of cushion materials for rockfall protection galleries |c Ravikiran Chikatamarla |
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| adam_text | OPTIMISATION OF CUSHION MATERIALS FOR ROCKFALL PROTECTION GALLERIES
RAVIKIRAN CHIKATAMARLA VEROFFENTLICHUNGEN DES INSTITUTS FUR GEOTECHNIK
(IGT) DER ETH ZURICH BAND 227, OKTOBER 2007 INSTITUT FUR GEOIECHOIK
PROF. DR.-LNG. R. KATZENBACB TECHNISCHE UNIVERSITAT DANRTSTARIT
PETERSENSTR. 13 * 64287 OARMSJSDT: IET V/DSF VDF HOCHSCHULVERLAG AG AN
DER ETH ZURICH FACHBEREICH 13 TU DARMSTADT 62510978 TABLE OF CONTENTS
ACKNOWLEDGEMENT I-II FORWARD III-IV ABSTRACT V-VIII LIST OF SYMBOLS
XIII-XIV INTRODUCTION 1.1 MOTIVATION 1 1.2 ROCKFALLS IN SWITZERLAND 2
1.2.1 RECENT ROCKFALL EVENTS IN SWITZERLAND 4 1.2.2 AXENSTRASSE (11TH
FEBRUARY, 2003) 5 1.2.3 RIPPISTAL (29TH APRIL 2003) 5 1.2.4 CHUEEBALM
(4TH JANUARY 2003) 6 1.3 DESIGN OF ROCK PROTECTION SYSTEMS 7 1.3.1
PROTECTION SYSTEMS AGAINST ROCKFALLS 7 1.3.2 DESIGN OF PROTECTION
GALLERIES IN SWITZERLAND 11 1.4 RISK ARISING DUE TO ROCKFALL EVENTS 13
1.4.1 RELIABILITY OF ROCKFALL PROTECTION GALLERIES 15 1.5 CONTEXT OF
RESEARCH AND METHODOLOGY 16 STATE-OF-THE-ART RELATED TO ROCKFALLS 2.1
ROCKFALLS ON SLOPES AND STRUCTURES 23 2.2 RESEARCH ACTIVITIES RELATED TO
TRAJECTORIES OF ROCKFALLS 27 2.3 LITERATUREREVIEW RELATED TO PRESENT
STUDY 28 2.3.1 LARGE SCALE FIELD AND EXPERIMENTAL TESTS 28 2.3.2
LABORATORY TESTS 32 2.3.3 ANALYTICAL MODELLING 33 2.3.4 NUMERICAL
ANALYSIS 38 2.4 RESEARCH GAPS AND NEEDS 41 LABORATORY TESTING 3.1
INTRODUCTION 45 3.1.1 ROCKFALL IMPACT EVENT ON PROTECTION GALLERY 45
3.1.2 CHOICE OF CUSHION MATERIALS 46 3.2 ASHBY CHART 46 3.2.1 SAND 49
3.2.2 ELASTOMERS 50 3.2.3 MIXTURES 53 3.2.4 CLAY LUMPS 55 3.3 LABORATORY
INVESTIGATIONS 56 3.3.1 SIEVE ANALYSIS OR PARTICLE SIZE DISTRIBUTION 56
3.3.2 RELATIVE DENSITY TESTS 61 3.3.3 OEDOMETER TESTS 62 3.3.4 TRIAXIAL
TESTS 68 3.3.5 ANGLE OF REPOSE TEST 75 3.3.6 COMPRESSIONAL AND SHEAR
WAVE VELOCITIES 76 IV 3.3.7 HAMMER TESTS 81 3.4 SUMMARY AND DISCUSSION
FOR LABORATORY INVESTIGATIONS .... 84 3.5 DURABILITY OF THE CUSHION
MATERIALS 86 3.6 DAMPING MECHANISMS OF CUSHION MATERIAL 87 3.6.1
POSSIBLE THEORIES FOR CHARACTERISATION OF DAMPING .... 91 3.6.2 DAMPING
MECHANISM OF NON CRUSHABLE MATERIALS 96 3.6.3 CRUSHING OF CLAY LUMPS 98
CENTRIFUGE MODELLING 4.1 ADVANTAGES OF CENTRIFUGE MODELLING 101 4.2
CENTRIFUGE MODELLING AND IMPACT STUDIES 103 4.3 THE ETHZ GEOTECHNICAL
DRUM CENTRIFUGE 104 4.4 TEST SETUP 105 4.4.1 GALLERY 107 4.4.2 BOULDER
108 4.4.3 GUIDING TUBE 109 4.5 MEASURING SYSTEMS 110 4.5.1 DATA
ACQUISITION BOX 111 4.5.2 ACCELEROMETERS 112 4.5.3 FORCE TRANSDUCERS 113
4.5.4 STRAIN GAUGES 114 4.5.5 PRESSURE PADS 115 4.6 MAGNET 116 4.7 HIGH
SPEED CAMERA 116 4.8 EXECUTION OF TEST , 118 4.9 SCALING LAWS FOR GUIDED
ROCKFALL IN THE CENTRIFUGE 119 4.9.1 DERIVATION OF SCALING LAWS 122
4.9.2 VELOCITY MEASUREMENTS 125 4.10 TEST PROGRAMME 131 4.11 PROPERTIES
OF CUSHION MATERIALS IN THE CENTRIFUGE TEST ... 133 4.12 RESULTS OF THE
CENTRIFUGE TESTS 137 4.12.1 SIGN CONVENTIONS USED 137 4.12.2
PRESENTATION OF THE RESULTS 138 4.12.3 OUTPUT PROFILE OF THE BOULDER 138
4.12.4 BENDING OF THE ALUMINIUM SLAB 141 4.12.5 ACCELERATION OF THE
PLATE FOR VERTICAL IMPACT 143 4.12.6 FORCE TRANSDUCERS 144 4.12.7
TEKSCAN 146 4.13 SUMMARY OF RESULTS 147 4.13.1 CONTACT STRESS
MEASUREMENT USING TEKSCAN 163 4.14 DISCUSSION 165 NUMERICAL MODELLING
5.1 INTRODUCTION 171 5.2 NUMERICAL ANALYSIS OF ROCKFALL IMPACT ON
CUSHION MATERIAL . 172 5.2.1 BASIC SETUP 172 5.2.2 MATERIAL MODELS 173
5.2.3 BOUNDARY CONDITIONS AND CONTACT 177 5.3 OUTPUT 179 5.3.1 SIGN
CONVENTIONS USED 180 5.3.2 VELOCITY OF THE ROCK BOULDER 180 5.3.3
DECELERATION PROFILE AND TRAJECTORIES OF THE ROCK BOULDER 181 5.3.4
PENETRATION OF THE ROCK BOULDER 183 5.3.5 NODAL DISPLACEMENT VECTORS IN
CUSHION MATERIAL 188 5.3.6 STRESSES AND IMPACT FORCE ON THE GALLERY ROOF
190 5.3.7 VARIATIONS 193 5.4 CONCLUSIONS AND DISCUSSION 203 SIMPLE
ANALYTICAL MODEL 8.1 LUMPED PARAMETER MODEL 207 6.1.1 ASSUMPTIONS OF THE
MODEL 208 6.1.2 INPUT PARAMETERS FOR THE MODEL 208 6.1.3 PROPERTIES OF
THE CUSHION MATERIAL 209 6.2 LUMPED PARAMETER MODELS: VERTICAL LOADING
211 6.2.1 THE SPRING - MASS - DASHPOT MODEL (SMD) 211 6.2.2 THE SPRING -
MASS - SLIDER - DASHPOT MODEL (SMSD) . 213 6.3 INCLINED LOADING:
HORIZONTAL COMPONENT (ISMSD MODEL) .. 219 6.4 RESULTS AND COMPARISON 221
6.4.1 THE SMD MODEL .221 6.4.2 THE SMSD MODEL 224 6.4.3 SMSD MODEL FOR
INCLINED IMPACTS 226 6.5 VALIDATION OF THE SMSD MODEL WITH THE
CENTRIFUGE RESULTS . 228 6.6 SUMMARY OF THE RESULTS 230 6.7 DISCUSSION
... 234 CONCLUSIONS AND PROSPECTS 7.1 INTRODUCTION 237 7.2 PROTECTION
GALLERIES 237 7.2.1 ROCKFALL DESIGN SCHEME 238 7.2.2 PROPOSED DESIGN
GUIDELINES FOR A SINGLE CUSHION LAYER 241 7.3 DEVELOPMENT OF NEW DESIGN
METHOD 243 7.3.1 ANALYTICAL MODELLING 243 7.4 OUTLOOK 243 REFERENCES
X/,.
|
| adam_txt |
OPTIMISATION OF CUSHION MATERIALS FOR ROCKFALL PROTECTION GALLERIES
RAVIKIRAN CHIKATAMARLA VEROFFENTLICHUNGEN DES INSTITUTS FUR GEOTECHNIK
(IGT) DER ETH ZURICH BAND 227, OKTOBER 2007 INSTITUT FUR GEOIECHOIK
PROF. DR.-LNG. R. KATZENBACB TECHNISCHE UNIVERSITAT DANRTSTARIT
PETERSENSTR. 13 * 64287 OARMSJSDT: IET V/DSF VDF HOCHSCHULVERLAG AG AN
DER ETH ZURICH FACHBEREICH 13 TU DARMSTADT' 62510978 TABLE OF CONTENTS
ACKNOWLEDGEMENT I-II FORWARD III-IV ABSTRACT V-VIII LIST OF SYMBOLS
XIII-XIV INTRODUCTION 1.1 MOTIVATION 1 1.2 ROCKFALLS IN SWITZERLAND 2
1.2.1 RECENT ROCKFALL EVENTS IN SWITZERLAND 4 1.2.2 AXENSTRASSE (11TH
FEBRUARY, 2003) 5 1.2.3 RIPPISTAL (29TH APRIL 2003) 5 1.2.4 CHUEEBALM
(4TH JANUARY 2003) 6 1.3 DESIGN OF ROCK PROTECTION SYSTEMS 7 1.3.1
PROTECTION SYSTEMS AGAINST ROCKFALLS 7 1.3.2 DESIGN OF PROTECTION
GALLERIES IN SWITZERLAND 11 1.4 RISK ARISING DUE TO ROCKFALL EVENTS 13
1.4.1 RELIABILITY OF ROCKFALL PROTECTION GALLERIES 15 1.5 CONTEXT OF
RESEARCH AND METHODOLOGY 16 STATE-OF-THE-ART RELATED TO ROCKFALLS 2.1
ROCKFALLS ON SLOPES AND STRUCTURES 23 2.2 RESEARCH ACTIVITIES RELATED TO
TRAJECTORIES OF ROCKFALLS 27 2.3 LITERATUREREVIEW RELATED TO PRESENT
STUDY 28 2.3.1 LARGE SCALE FIELD AND EXPERIMENTAL TESTS 28 2.3.2
LABORATORY TESTS 32 2.3.3 ANALYTICAL MODELLING 33 2.3.4 NUMERICAL
ANALYSIS 38 2.4 RESEARCH GAPS AND NEEDS 41 LABORATORY TESTING 3.1
INTRODUCTION 45 3.1.1 ROCKFALL IMPACT EVENT ON PROTECTION GALLERY 45
3.1.2 CHOICE OF CUSHION MATERIALS 46 3.2 ASHBY CHART 46 3.2.1 SAND 49
3.2.2 ELASTOMERS 50 3.2.3 MIXTURES 53 3.2.4 CLAY LUMPS 55 3.3 LABORATORY
INVESTIGATIONS 56 3.3.1 SIEVE ANALYSIS OR PARTICLE SIZE DISTRIBUTION 56
3.3.2 RELATIVE DENSITY TESTS 61 3.3.3 OEDOMETER TESTS 62 3.3.4 TRIAXIAL
TESTS 68 3.3.5 ANGLE OF REPOSE TEST 75 3.3.6 COMPRESSIONAL AND SHEAR
WAVE VELOCITIES 76 IV 3.3.7 HAMMER TESTS 81 3.4 SUMMARY AND DISCUSSION
FOR LABORATORY INVESTIGATIONS . 84 3.5 DURABILITY OF THE CUSHION
MATERIALS 86 3.6 DAMPING MECHANISMS OF CUSHION MATERIAL 87 3.6.1
POSSIBLE THEORIES FOR CHARACTERISATION OF DAMPING . 91 3.6.2 DAMPING
MECHANISM OF NON CRUSHABLE MATERIALS 96 3.6.3 CRUSHING OF CLAY LUMPS 98
CENTRIFUGE MODELLING 4.1 ADVANTAGES OF CENTRIFUGE MODELLING 101 4.2
CENTRIFUGE MODELLING AND IMPACT STUDIES 103 4.3 THE ETHZ GEOTECHNICAL
DRUM CENTRIFUGE 104 4.4 TEST SETUP 105 4.4.1 GALLERY 107 4.4.2 BOULDER
108 4.4.3 GUIDING TUBE 109 4.5 MEASURING SYSTEMS 110 4.5.1 DATA
ACQUISITION BOX 111 4.5.2 ACCELEROMETERS 112 4.5.3 FORCE TRANSDUCERS 113
4.5.4 STRAIN GAUGES 114 4.5.5 PRESSURE PADS 115 4.6 MAGNET 116 4.7 HIGH
SPEED CAMERA 116 4.8 EXECUTION OF TEST , 118 4.9 SCALING LAWS FOR GUIDED
ROCKFALL IN THE CENTRIFUGE 119 4.9.1 DERIVATION OF SCALING LAWS 122
4.9.2 VELOCITY MEASUREMENTS 125 4.10 TEST PROGRAMME 131 4.11 PROPERTIES
OF CUSHION MATERIALS IN THE CENTRIFUGE TEST . 133 4.12 RESULTS OF THE
CENTRIFUGE TESTS 137 4.12.1 SIGN CONVENTIONS USED 137 4.12.2
PRESENTATION OF THE RESULTS 138 4.12.3 OUTPUT PROFILE OF THE BOULDER 138
4.12.4 BENDING OF THE ALUMINIUM SLAB 141 4.12.5 ACCELERATION OF THE
PLATE FOR VERTICAL IMPACT 143 4.12.6 FORCE TRANSDUCERS 144 4.12.7
TEKSCAN 146 4.13 SUMMARY OF RESULTS 147 4.13.1 CONTACT STRESS
MEASUREMENT USING TEKSCAN 163 4.14 DISCUSSION 165 NUMERICAL MODELLING
5.1 INTRODUCTION 171 5.2 NUMERICAL ANALYSIS OF ROCKFALL IMPACT ON
CUSHION MATERIAL . 172 5.2.1 BASIC SETUP 172 5.2.2 MATERIAL MODELS 173
5.2.3 BOUNDARY CONDITIONS AND CONTACT 177 5.3 OUTPUT 179 5.3.1 SIGN
CONVENTIONS USED 180 5.3.2 VELOCITY OF THE ROCK BOULDER 180 5.3.3
DECELERATION PROFILE AND TRAJECTORIES OF THE ROCK BOULDER 181 5.3.4
PENETRATION OF THE ROCK BOULDER 183 5.3.5 NODAL DISPLACEMENT VECTORS IN
CUSHION MATERIAL 188 5.3.6 STRESSES AND IMPACT FORCE ON THE GALLERY ROOF
190 5.3.7 VARIATIONS 193 5.4 CONCLUSIONS AND DISCUSSION 203 SIMPLE
ANALYTICAL MODEL 8.1 LUMPED PARAMETER MODEL 207 6.1.1 ASSUMPTIONS OF THE
MODEL 208 6.1.2 INPUT PARAMETERS FOR THE MODEL 208 6.1.3 PROPERTIES OF
THE CUSHION MATERIAL 209 6.2 LUMPED PARAMETER MODELS: VERTICAL LOADING
211 6.2.1 THE SPRING - MASS - DASHPOT MODEL (SMD) 211 6.2.2 THE SPRING -
MASS - SLIDER - DASHPOT MODEL (SMSD) . 213 6.3 INCLINED LOADING:
HORIZONTAL COMPONENT (ISMSD MODEL) . 219 6.4 RESULTS AND COMPARISON 221
6.4.1 THE SMD MODEL .221 6.4.2 THE SMSD MODEL 224 6.4.3 SMSD MODEL FOR
INCLINED IMPACTS 226 6.5 VALIDATION OF THE SMSD MODEL WITH THE
CENTRIFUGE RESULTS . 228 6.6 SUMMARY OF THE RESULTS 230 6.7 DISCUSSION
. 234 CONCLUSIONS AND PROSPECTS 7.1 INTRODUCTION 237 7.2 PROTECTION
GALLERIES 237 7.2.1 ROCKFALL DESIGN SCHEME 238 7.2.2 PROPOSED DESIGN
GUIDELINES FOR A SINGLE CUSHION LAYER 241 7.3 DEVELOPMENT OF NEW DESIGN
METHOD 243 7.3.1 ANALYTICAL MODELLING 243 7.4 OUTLOOK 243 REFERENCES
X/,. |
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| series2 | Veröffentlichungen des Instituts für Geotechnik (IGT) der ETH Zürich ETH-Dissertation |
| spelling | Chikatamarla, Ravikiran Verfasser aut Optimisation of cushion materials for rockfall protection galleries Ravikiran Chikatamarla Zürich Vdf, Hochsch.-Verl. an der ETH 2007 XIV, 260 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier Veröffentlichungen des Instituts für Geotechnik (IGT) der ETH Zürich 227 ETH-Dissertation 16315 Zugl.: Zürich, ETH, Diss. (DE-588)4113937-9 Hochschulschrift gnd-content Veröffentlichungen des Instituts für Geotechnik (IGT) der ETH Zürich 227 (DE-604)BV006644102 227 HEBIS Datenaustausch Darmstadt application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=016473418&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Chikatamarla, Ravikiran Optimisation of cushion materials for rockfall protection galleries Veröffentlichungen des Instituts für Geotechnik (IGT) der ETH Zürich |
| subject_GND | (DE-588)4113937-9 |
| title | Optimisation of cushion materials for rockfall protection galleries |
| title_auth | Optimisation of cushion materials for rockfall protection galleries |
| title_exact_search | Optimisation of cushion materials for rockfall protection galleries |
| title_exact_search_txtP | Optimisation of cushion materials for rockfall protection galleries |
| title_full | Optimisation of cushion materials for rockfall protection galleries Ravikiran Chikatamarla |
| title_fullStr | Optimisation of cushion materials for rockfall protection galleries Ravikiran Chikatamarla |
| title_full_unstemmed | Optimisation of cushion materials for rockfall protection galleries Ravikiran Chikatamarla |
| title_short | Optimisation of cushion materials for rockfall protection galleries |
| title_sort | optimisation of cushion materials for rockfall protection galleries |
| topic_facet | Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=016473418&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
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