Category: Events - Important (on right) PennDOT SR 30 over Bessemer Avenue Bridge Replacement in One Weekend

August 25, 2016 1:00 pm

by Louis J. Ruzzi, P.E., PennDOT District 11-0 Bridge Engineer, Pittsburgh area; John Myler, PennDOT Assistant Construction Engineer, District 11-0; and Bala Sivakumar, P.E., Vice President, Director-Special Bridge Projects, HNTB

Webinar Documents

Description: The Pennsylvania DOT replaced the SR 30 over Bessemer Avenue Bridge in a 57-hour closure over a weekend in May 2016. The ABC elements in this project are precast concrete abutment caps, modular decked beams, and precast concrete approach slabs. Each modular decked beam consists of two steel I-girders with composite deck. Traffic barriers were cast with the decks in two of the six modular decked beams that form the single-span superstructure. The six modular decked beams were connected with ultra-high performance concrete (UHPC) deck joints. The contractor was able to complete the work despite heavy rains during half of the weekend. This presentation includes design and construction details as well as lessons learned.

August 2016_1_Demolition of old bridge

Demolition of old bridge

August 2016_Photo 2_Prep of existing abutments

Prep of existing abutments

August 2016_Photo 3_Erection of precast cap on existing abutment

Erection of precast cap on existing abutment

August 2016_Photo 4_Erection of modular decked beam element

Erection of modular decked beam element

August 2016_Photo 5_Placing UHPC in deck closure joint

Placing UHPC in deck closure joint

August 2016_Photo 6_New bridge in 57 hours

New bridge in 57 hours