Construction—North America—USA—Structural Repair Solutions
For those ducts that had incurred major
damage over the years in the form of splitting
and cracking, DSI designed and installed
a special split duct system for permanent
repair. All of the existing voids inside the post-
tensioning tendons were filled by DSI using a
vacuum or vacuum-assisted grouting method.
The largest challenge to overcome on the
project was the access to the work areas
inside of the precast segments. This was
primarily done from directly underneath the
bridge segments through integrated hatches
that were many times located directly above
heavy traffic areas of street level roadways
and parking lots. This demanded considerable
traffic control with lane closures and the need
to complete a significant amount of the work at
night.
Despite the large project footprint and other
challenges encountered, DSI completed all
repair measures within the contract timeframe of
just over two years. DSI’s crews worked safely
on these structures, logging over 75,000 man
hours to complete the work.
Owner
Texas Department of
Transportation (TXDOT), USA
General Contractor
SCR Construction Co., Inc., USA
DSI Unit
DYWIDAG-Systems International
USA Inc., Structural Repair, USA
DSI Scope
Design, production, supply, installation,
technical support, grouting
DYWIDAG Products
Anchor caps, duct system
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