I-84 over Dingle Ridge Road
Replacement of I-84 Bridges over the Dingle Ridge Road
Services: Pile Foundations, Temporary Supports, Temporary Jacking Plans, Erection Plans, Select Demolition Plans, Crane Platform Support
Location: Putnam County, New York
Owner: State of New York
Contract Number: D262100
Contractor: Yonkers Contracting Company, Inc.
The I-84 over Dingle Ridge Road Bridge Replacement was an Accelerated Bridge Construction Project that stopped traffic on Interstate 84 for two days while the structure was replaced. The time-saving design had the replacement bridge built next to the existing bridge, demolish the existing bridge, then laterally slide the new bridge in place of the demolished one.
Siefert underwent a broad scope of work formed around the contractor’s preferred means and methods. Examples of Siefert Associate’s scope of work in this project are as follows:
Design of H-pile foundations for temporary bents which supported the proposed bridge superstructure during construction and sliding into final position
Modifications to permanent structure during slide track erection including additional concrete and steel reinforcements, grouted anchor analysis, anchor bolt material changes, weld analysis, and setting of the header beam
Lift plans that utilized multiple cranes simultaneously
Existing bridge deck demolition plans
Design of crane mat and crane mat support for multiple crawler cranes
Analysis of damaged concrete cap beam
Slide track design
Siefert dedicated a team of veteran engineers to send on-time drawings to the client, achieving the overall goal of completing the whole bridge demolition and erection in one weekend while minimizing the disruptions to traffic and commuters.