Bridge Launching – Second Edition

Contents Preface to the second edition vii
About the author xi
1 Introduction 1
1.1 Introduction to bridge launching 6
1.2 Launching of PC bridges 7
1.3 Launching of steel girders 9
1.4 Launching of prestressed composite box girders 10
1.5 Symbols 11
References 16
2 Bridge Launching 17
2.1 Launch of single spans 17
2.2 Rotation 20
2.3 Jacking and skidding 23
2.4 Incremental launching 24
2.5 Launching over arches 32
2.6 Launch of cable-suspended decks 35
2.7 Geometry constraints of incremental launching 39
2.8 Launch techniques 43
2.9 Launch bearings and lateral guides 62
2.10 Launch and lock forces 66
2.11 Correction of launch stresses 68
2.12 Launch stressed in the piers 103
2.13 Launch stress analysis 110
2.14 Envelopes of bending and shear 127
2.15 Design validation by surveying and deck monitoring 128
References 132
3 Prestressed concrete bridges 137
3.1 Deck segmentation and yard organisation 140
3.2 In-place casting of segments 144
3.3 Precast segmental highway overpasses 169
3.4 Launch bearings and lateral guides 170
3.5 Time-dependent effects 187
3.6 Prestressing 194
3.7 Reinforcement 220
References 222
4 Steel and composite bridges 225
4.1 Conceptual design and pre-sizing 226
4.2 Girder segmentation 242
4.3 Organisation of the assembly yard 246
4.4 Launch of steel girders 252
4.5 Launch of trusses 374
4.6 Concrete slab 275
References 295
5 Prestressed composite bridges 299
5.1 High-performance concrete 300
5.2 Lightweight concrete 303
5.3 Introduction to prestressed composite bridges 303
5.4 Cross-sectional efficiency 306
5.5 Prestressed composite box girders with stiffened-plate
webs 309
5.6 Prestressed composite box girders with corrugated-plate
webs 314
References 341
Index 347