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Fundamentals of Railway Line

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Author: Ma Guozhong; Chen Tao; ;
Language: English
Page: 305
Publication Date: 08/2018
ISBN: 9787564362508
Publisher: Southwest Jiaotong University Press
Table of Contents
CHARPTER 1  INTRODUCTION 1
1.1  The origin and development of railway 1
1.2  History and development of china railway 4
1.3  Status and development of high speed railway 7
1.4  Role and advantage of railway 11
1.5  Composition of railway line 12
CHARPTER 2  TRACK ELEMENTS 14
2.1  Introduction 14
2.1.1  Traditional track structure 15
2.1.2  Features of track 19
2.2  Rail 23
2.2.1  History 23
2.2.2  The function of rails 26
2.2.3  The length and weight of rails 27
2.2.4  Rail profile 29
2.2.5  Chemical composition and manufacture 33
2.2.6  Rail life and maintenance 35
2.3  Sleeper 39
2.3.1  Functions of sleeper 40
2.3.2  Timber sleepers 40
2.3.3  Reinforced concrete sleepers 45
2.3.4  Sleeper spacing 50
2.3.5  Other types of railway sleeper 53
2.4  Rail joints and rail fastenings 56
2.4.1  Rail joints 56
2.4.2  Rail fastening 64
2.5  Track ballast 75
2.5.1  Purposes of ballast 76
2.5.2  Ballast materials 77
2.5.3  Ballast section 80
2.5.4  Phenomena occurred over the ballast 83
2.6  Rail creep 86
2.6.1  Causes of creep 87
2.6.2  Measurement of creep 89
2.6.3  Adjustment of creep 90
2.6.4  Anti-creep devices 91
2.6.5  Gauge rods and rail brace 92
2.7  Railroad level crossing 93
2.7.1  Overview 93
2.7.2  Protection arrangements of level crossings 94
2.7.3  Construction of level crossings 95
2.7.4  Choice of Crossing Panel Type 96
2.8  Ballastless track 98
2.8.1  Introduction 98
2.8.2  Different ballastless track system 99
2.8.3  Ballastless track of Chinese high-speed railway 103
CHARPTER 3  TRACK GEOMETRY 109
3.1  Introduction 109
3.2  Basic track geometry elements 110
3.2.1  Track gauge 110
3.2.2  Track alignment(or profile) 112
3.2.3  Cross level 114
3.2.4  Track twist(or warp) 115
3.2.5  Rail cant 116
3.2.6  Gradients 118
3.2.7  Surface (or longitudinal level) 121
3.2.8  Irregularity 122
3.3  Track super-elevation 123
3.3.1  Track plane acceleration 124
3.3.2  Equilibrium super-elevation and balanced speed 125
3.3.3  Super-elevation deficiency and super-elevation excess 126
3.3.4  Permissible speed with respect to radius, super-elevation 
and super-elevation deficiency 128
3.3.5  Rate of super-elevation and rate of super-elevation deficiency 129
3.3.6  Tilt technology 129
3.4  Track transition curves 130
3.4.1  Curves 130
3.4.2  The function of transition curves 133
3.4.3  The geometric features of transition curves 134
3.4.4  Shapes of transition curves 136
3.4.5  Length of transition curves 138
3.5  Gauge Widening of Curves 141
3.5.1  Geometrical requirements for rolling stocks negotiating (traversing) curved tracks 142
3.5.2  Gauge widening for vehicle 143
3.5.3  Gauge widening for locomotives 144
3.5.4  Maximum gauge widening on curves tracks 146
CHARPTER 4  TURNOUTS 149
4.1  Introduction 149
4.1.1  Concept 149
4.1.2  Type of turnouts 150
4.2  Structure of normal simple turnout 156
4.2.1  Components of normal simple turnout 156
4.2.2  Switches 159
4.2.3  Crossings 166
4.2.4  Lead rail 174
4.3  Turnouts Sleepers 176
4.4  Installation and maintenance of turnouts 178
CHARPTER 5  CONTINUOUS WELDED RAIL (CWR) 181
5.2  Fundamentals theory of CWR 184
5.2.1  Rail temperature force and temperature stress 184
5.2.2  Rail temperature 185
5.2.3  Longitudinal resistance and diagram of rail temperature 190
5.3  Welding methods of CWR 193
5.3.1  Chemical or thermit welding 193
5.3.2  Flash butt welding 195
5.3.3  Gas butt welding 197
5.3.4  Electric arc welding 197
5.3.5  Welding failure 197
5.4  Regional CWR and Seamless Turnout 198
5.4.1  Regional CWR 198
5.4.2  Seamless turnout 201
CHARPTER 6  TRACK MAINTENANCE 203
6.1  Introduction 203
6.1.1  Outline 203
6.1.2  Good maintenance features 204
6.2  Type of maintenance 206
6.2.1  Period of maintenance 206
6.2.2  Level of maintenance 206
6.3  Contents of maintenance 207
6.3.1  Maintenance of track geometry 208
6.3.2  Maintenance of track components 208
6.3.3  Maintenance of turnouts 211
6.3.4  Maintenance of level crossings 212
6.3.5  Maintenance of drainage 212
6.4  Track maintenance activities 213
6.4.1  Tamping 214
6.4.2  Dynamic track stabilization 216
6.4.3  Ballast cleaning 216
6.4.4  Rail grinding 217
6.4.5  Rail lubrication 218
6.4.6  Replacement 219
6.5  Maintenance management of Chinese railway 220
6.6  High-speed rail line maintenance 221
CHARPTER 7  RAILROAD SUBGRADE 224
7.1  Subgrade design and construction 225
7.1.1  Typical cross sections 225
7.1.2  Geometric design 229
7.2  Stability of subgrade 235
7.2.1  Instability performance of subgrade 236
7.2.2  Stabilization methods 241
7.3  Subgrade drainage 247
7.3.1  Introduction 247
7.3.2  Drainage system 248
7.3.3  Drainage problems 251
CHARPTER 8  TUNNELS AND BRIDGES 253
8.1  Tunnels 253
8.1.1  Overview 253
8.1.2  Tunnel cross-section 254
8.1.3  Tunnel structure 256
8.1.4  Tunnel construction 266
8.1.5  Tunnel maintenance 277
8.2  Bridges 279
8.2.1  Bridge components 279
8.2.2  Bridge type 282
8.2.3  Bridge construction 293
8.2.4  Bridge maintenance 295
8.3  Choice of tunnels vs. bridges 296
TEST SHEET 299
REFERENCE 303
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