Tag Archives: Arch Bridge

How do you move a 300 ton concrete arch?


Image Source: Star Telegram.com

Very carefully, of course! (You knew that was coming!)

DBA has had the pleasure of consulting with Sundt Construction on their effort to replace the West 7th Street Bridge over the Trinity River in Fort Worth, Texas.  Our role has been to provide geotechnical consulting for the heavy lifts of the arches, as well as a VE design on a secant wall.

West 7th Street is a major artery into downtown Fort Worth.  From the City of Fort Worth:

The aging Seventh Street Bridge, a popular east-west thoroughfare that connects downtown to the Cultural District, is due to be reconstructed.

The original span was built in 1913 and was expanded in 1953 when the Trinity River was rerouted and the surrounding levees were built. Although the bridge has been determined safe to use, beams, girders and the deck of the 1913 section are deteriorating.

To reduce the impact of closing the bridge, Sundt has installed new drilled shaft foundations on either side of the existing bridge.  The twelve, 163-foot long, 300-ton concrete arches were fabricated off-site on the west side of the river.  Large trailer dollies with 120 wheels move the arches from the yard to the site.  Large cranes from Burkhalter (heavy lift and transport specialist) pick the arches from the dollies on the existing bridge and set them on the new foundations.  The bridge is closed or partially closed during each lift.  Once all of the arches are in place, the bridge will be closed to demolish the existing structure and build the new deck between the pairs of arches.  The compete closure is supposed to last only 150 days.

Here is a time lapse video of the first arch being set:

The first arches were set over the weekend of May 11-12.  Here are some links to video and articles:

300-ton arches for new bridge moving toward Trinity (Fort Worth Star Telegram, May 7, 2013)

TxDOT West 7th Street Bridge You Tube Channel – includes time lapse of first arch.

KDFW Fox4 News


Bonus: For all of those that love “big boys with big toys” , make sure and check out the Burkhalter web site

Hastings Bridge Takes Shape with Newly Installed Main Span

photo by Chad Richardson of the Hastings Star Gazette

A major construction feat was recently completed at the Highway 61 bridge project in Hastings, Minnesota when the 545-foot, 6.5 million-pound main bridge span was hoisted into place, 50 feet above the Mississippi river.  The main span, the longest free-standing tied-arch in North America, was constructed on the shore of the Mississippi River, about a mile upstream of the river crossing.  Placed on massive dollies, the span was rolled onto a set of six barges and floated downstream.  Once positioned under the piers, hydraulic jacks on top of the piers slowly lifted the span into place.  Around midnight on Sunday, September 23rd, 2012, the lift was complete.  By noon of the following day the span was secured in place and the existing bridge was reopened to traffic. A time lapse video of the entire process can be viewed below or on YouTube.

Links to news stories published about the main span lift:

Mn/DOT News Release

Minneapolis Star Tribune, “New Hastings bridge reaches into the future”

Hastings Star Gazette, “A massive lift, massive relief – Bridge crews worked long hours, drank 50 gallons of coffee and ate 10 gallons of chili”

Links to project information:

MnDOT Project Page

DBA Project Page

Previous Hastings Blog Posts