Construction

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

A brand new 5-million-pound bridge that would be the first of its type in Michigan has been moved into place over the I-94 freeway in Detroit, because of particular equipment often known as self-propelled modular transporters.

The Michigan Division of Transportation closed the freeway July 22 for seven days to maneuver what is going to develop into the brand new Second Avenue Bridge over I-94. The bridge skeleton was constructed over two years in a parking zone at close by Wayne State College. (To look at a time-lapse video if its transfer, see the top of this story.)

Second Avenue bridge move I-94 Detroit four red Mammoet self-propelled modular transporters lined up parallel4 Mammoet self-propelled modular transporters have been used to maneuver the 5-million-pound Second Avenue skeleton bridge into place over I-94 in Detroit.Michigan DOTThe bridge – which is 245 toes lengthy and 96 toes vast – was carried on 4 Mammoet self-propelled modular transporters (SPMTs). The flat-bed SPMTs are supported by a number of axles which are every independently managed to maintain the bridge skeleton stage because it travels, to stop harm. The 4 SPMTs are managed by one operator with a digital management panel. The operator walks together with the bridge as it’s moved, and different staff additionally accompany it to behave as lookouts.

After the bridge was moved from the parking zone to the abutments for its new residence over I-94, one other SPMT was used to carry the main finish of the span and transfer it throughout the freeway to the alternative abutments. Then the bridge was jacked down into place.

After it’s inspected, bolstered metal and concrete decking will probably be put in.

Second Avenue Bridge over I-94 Detroit being moved into place by self-propelled modular transportersThe Second Avenue Bridge rolling into place.Michigan DOTThe community, tied-arch bridge’s design is a primary for the state. As a substitute of vertical cables, it consists of 30 metal cables in a diagonal, crisscrossed “community” configuration for every of the 2 arches. The bridge was designed that approach for added assist as a result of it won’t have a middle pier.

Different unusual design options:

  • Tied arch – the ends of the arches are tied so that they can’t unfold laterally underneath the burden of the deck and site visitors.
  • Skewed – the bridge will not be a rectangle however has two obtuse and two acute angles at its ends.
  • Unbraced – there aren’t any connections between the highest of the arches.

The bridge is predicted to final 50 to 60 years. The cables are replaceable.

The brand new Second Avenue Bridge is a part of a greater than $3 billion venture to rebuild 6.7 miles of the I-94 freeway in Detroit. The bridge will consist of 1 lane in every course, in addition to have 9-foot-wide sidewalks and 8-foot-wide bike lanes. The substitute bridge is predicted to open within the fall after closing changes to the cables happen. MDOT says no cable changes will probably be remodeled stay site visitors.

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

Take a look at a time-lapse video beneath of the bridge transfer as tweeted by Michigan Lt. Gov. Garlin Gilchrist II:

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