Chapter 2: Summary

Based on the scanning study, the following technologies were identified as different from current practices in the United States or incorporated refinements not common in the United States. The countries where the technology was identified are also listed.

Bridge Movement Systems

Incremental launching (Japan, Germany, France)

Vertical lifting (Japan, France)

Horizontal sliding using strand jacks (Netherlands, France)

Self-propelled modular transporters (Japan, Netherland, Belgium, France)

Floating methods using the dry dock approach or barges (Belgium, France)

Pivoting (France)

Superstructure Systems

External longitudinal post-tensioning of box girder bridges (Japan, Germany)

U-shaped segments with transverse ribs (Japan)

Corrugated steel webs (Japan)

Mixed use of steel and concrete superstructure systems in the same bridge (Japan)

Extradosed bridges (Japan)

Use of temporary girders as part of the finished structure (Japan)

Mitsuki Bashi method (Japan)

Integral bent caps for appearance and continuity (Germany, France)

Partial-depth decks prefabricated on steel and concrete beams (Germany)

Multistage prestressing (Germany)

Poutre Dalle system (France)

Dalle Preflex system (France)

Ultra high-performance concrete beams and stay-in-place panels (France)

Deck Systems

Transverse pretensioning of concrete decks for precast segmental box girders (Japan)

Deck joint closure details (Japan, France)

Full-depth prefabricated concrete decks (Japan, France)

Hybrid steel-concrete deck systems (Japan)

Multiple-level corrosion protection systems (Japan, Germany, France)

Substructure Systems

SPER method (Japan)

Expanded polystyrene as subgrade material (Japan)

Multipulley pile extractor (Japan)

Other Technologies

Photogrammetry with high-precision cameras (Japan)

Epoxy-coated reinforcement for corrosion protection during storage (Japan)

Epoxy-coated strands without duct protection (Japan)

Design validation by testing (Japan)

Sound barriers (Japan, Germany, France)

Performance-based specifications for durability (France)