Lateral Slide and UHPC Integral Abutment Connections on Iowa’s 2019 Camp Creek Bridge Replacement

May 21, 2020 1:00 pm

James S. Nelson, P.E., Director, Bridges & Structures Bureau, Iowa DOT; Brent M. Phares, Ph.D., P.E., Director, Bridge Engineering Center, Iowa State University; and Matt Erickson, Engineer Associate, Iowa DOT

Webinar Documents:
Lateral Slide and UHPC Integral Abutment Connections on Iowa’s 2019 Camp Creek Bridge Replacement - pdf of presentation

Q&A Session – pdf
Reference for Question 6: Iowa DOT Special Provisions for Prefabricated Bridge Superstructure Move
Reference for Question 9: Iowa DOT Special Provisions for Ultra High Performance Concrete
Reference for Question 22: FHWA Technote: Design and Construction of Field-Cast UHPC Connections

News - May 21, 2020 - pdf of presentation

Description: In 2019 the Iowa Department of Transportation replaced the Iowa Highway 1 Bridge over Camp Creek using the lateral slide technology and a new Ultra-High-Performance Concrete (UHPC) integral abutment connection. The bridge was completed ahead of schedule within an allowed 14-day critical closure. The UHPC integral abutment connection detail used in this bridge replacement was developed and tested in an ABC-UTC research project [ABC-UTC-2013-C3-ISU02] with Iowa DOT research project match, and was conducted at Iowa State University. The new connection design is emulative, mimicking the Iowa DOT’s standard integral abutment details. It was specifically developed for bridges that are replaced using lateral slide technology, making integral abutments constructible for lateral slides. The presentation begins with an overview of ABC activities in Iowa. The ABC overview is followed by a description of the UHPC integral abutment connection detail developed in the research. Design and construction details and lessons learned for the bridge replacement, with focus on the lateral slide and integral abutments, are then discussed.

 Presentation Photos/Graphics:

1) Integral abutment detail with UHPC connection

2) Laboratory UHPC integral abutment connection specimen (before placement of UHPC)

3) Front face of field UHPC integral abutment connection (before placement of UHPC)

4) Back face of field UHPC integral abutment connection (after placement of UHPC and removal of forms)

5) Bridge staging area next to existing bridge

6) Completed bridge