Title:
Denny Creek Bridge: A Concrete
Answer to Environmental Challenges
Author(s):
M. K. Hurd
Publication:
Concrete International
Volume:
2
Issue:
11
Appears on pages(s):
16-24
Keywords:
bridges (structures); concrete construc-tion;
formwork (construction); post-tensioning;
precast concrete; structural design.
DOI:
Date:
11/1/1980
Abstract:
A description of the planning and construction of a 3600 ft (1098 m) post-tensioned, cast-in-place concrete box girder bridge in a wilderness setting near Seattle, Wash. Esthetic and environmental concerns which delayed the bridge are explained and alternate designs using precast concrete are shown. Three stage construction based on an elaborate movable scaffold supported from bridge piers eliminated con-ventional falsework and helped preserve forest vegetation. Avalanche loadings were provided for in the design and instrumentation to measure long-term behavior under highway loadings has been installed.