| Location:
Pearl Harbor, Hawaii
This bridge
allows vehicular access to Ford Island from the Hawaiian mainland at Pearl
Harbor. The bridge utilizes a moveable floating pontoon section in order
to accommodate the passage of large naval vessels through the harbor. The
pontoon section of the bridge was precast in three sections in Tacoma,
Washington and delivered to Pearl Harbor by barge.
During construction
of the post-tensioned pontoon sections, a localized failure occurred in
the concrete deck of one of the sections due to a trajectory change in
the post-tensioning tendon ducts.
Because of
our specialized expertise in the nondestructive testing and evaluation
of concrete structures, WDP was retained as a subconsultant to assist with
the evaluation and repair of damage that occurred to the post-tensioned
pontoon sections of the bridge. There was a concern that the nature of
the stressing operations causing the localized failure that occurred during
construction may have caused additional unseen damage elsewhere in the
structure. WDP chose to conduct impact-echo testing over areas of the concrete
deck where the |
|
Client:
Engineer
suspect tendon
duct trajectory was employed. The impact-echo testing could detect the
presence, if any, of delaminations in the concrete slab in the vicinity
of the post-tensioned anchors.
WDP's testing
and evaluation located significant areas within the concrete decks that
were delaminated. The report clearly documented the extent of the delaminations
present so the delaminations could be repaired. The delaminations were
eventually repaired by the use of epoxy injection.
Services
WDP used on this project included:
|
