Bridge transported into place over Detroit’s I-94 freeway (Video)

A new 5-million-pound bridge that will be the first of its type in Michigan has been moved into area about the I-94 freeway in Detroit, many thanks to special machinery identified as self-propelled modular transporters.

The Michigan Office of Transportation shut the freeway July 22 for 7 days to shift what will turn into the new Next Avenue Bridge over I-94. The bridge skeleton was built more than two years in a parking lot at nearby Wayne State University. (To check out a time-lapse video if its transfer, see the finish of this tale.)

Four Mammoet self-propelled modular transporters were being utilized to transfer the 5-million-pound 2nd Avenue skeleton bridge into area over I-94 in Detroit.Michigan DOTThe bridge – which is 245 ft extended and 96 ft large – was carried on four Mammoet self-propelled modular transporters (SPMTs). The flat-mattress SPMTs are supported by various axles that are every independently managed to preserve the bridge skeleton level as it travels, to prevent problems. The 4 SPMTs are controlled by 1 operator with a electronic regulate panel. The operator walks along with the bridge as it is moved, and other workers also accompany it to act as lookouts.

Right after the bridge was moved from the parking good deal to the abutments for its new household in excess of I-94, an additional SPMT was utilised to raise the foremost conclusion of the span and shift it across the freeway to the reverse abutments. Then the bridge was jacked down into put.

Right after it is inspected, strengthened metal and concrete decking will be put in.

The 2nd Avenue Bridge rolling into spot.Michigan DOTThe network, tied-arch bridge’s design is a initial for the state. As an alternative of vertical cables, it consists of 30 metal cables in a diagonal, crisscrossed “network” configuration for every single of the two arches. The bridge was created that way for more guidance for the reason that it will not have a middle pier.

Other unheard of structure functions:

• Tied arch – the finishes of the arches are tied so they can not spread laterally beneath the weight of the deck and website traffic.
• Skewed – the bridge is not a rectangle but has two obtuse and two acute angles at its ends.
• Unbraced – there are no connections among the leading of the arches.

The bridge is predicted to previous 50 to 60 decades. The cables are replaceable.

The new 2nd Avenue Bridge is section of a extra than $3 billion project to rebuild 6.7 miles of the I-94 freeway in Detroit. The bridge will consist of just one lane in every direction, as properly as have 9-foot-vast sidewalks and 8-foot-huge bicycle lanes. The substitute bridge is envisioned to open in the slide after remaining changes to the cables happen. MDOT claims no cable changes will be built more than reside website traffic.

The bridge was designed by TetraTech, and the tied-arch span by HDR. Z Contractors is the contractor for the $26 million bridge venture.

Verify out a time-lapse video below of the bridge shift as tweeted by Michigan Lt. Gov. Garlin Gilchrist II: