Mammoet tackles Texas transport

By Hannah Sundermeyer06 August 2020

Aiding construction on the “Signature Bridge” project in Irving, Texas, USA, Mammoet set four precast box-girder bridge units into place.

The international heavy lift and transport specialist was working for the Texas Department of Transportation and its general contractor Webber, LLC. The new bridge will stretch 500 feet (150 metres) over State Highway 114 and will connect the former Texas Stadium site to a new mixed-use development, which will include a new Dallas Area Rapid Transit light rail station.

mammoet snipping 2

Each bridge unit weighed 720 US tons and was transported and set using self propelled modular transporter (SPMT), during specific, planned overnight traffic outages to ensure minimal disruption to the public

The original plan was to use jacking and skidding equipment so the bridge could be built on top of the existing one and skidded over to its new foundation. When reviewing the engineering, Mammoet devised a solution for the units to be built directly on the ground in an off-site location, after which each one would be picked up and self-loaded using SPMT. This method is known as accelerated bridge construction or ABC.

ABC avoided the need for work to be done at height, thereby eliminating many safety concerns, and allowing for quicker loading time than originally anticipated. It shortened the job by two overnight shifts.

To execute as planned, a trench was dug underneath each 120 foot (37 metre) section to allow installation of a beam under each end of the bridge unit. The sections were then lifted using a 700 ton (635 tonne) capacity gantry system and once elevated, Mammoet drove SPMT underneath to load each piece before delivering to the abutments.

The route from construction site to final setting presented challenges, including steep grades and tight spaces to negotiate. By co-ordinating with Webber and careful engineering, the team set all four bridge units in the allotted traffic outage. Since the start of the project in 2017, there were more than 170,000 hours with zero recordable incidents.

insert 1 mammoet

The Mammoet team set four precast box-girder bridge units into place in Irving, Texas, USA

MAGAZINE
NEWSLETTER
Delivered directly to your inbox, World Crane Week Newsletter features the pick of the breaking news stories, product launches, show reports and more from KHL's world-class editorial team.
Long Reads
Post-pandemic demand lengthens delivery times for construction equipment
Government stimulus measures following the global pandemic have led to a surge in demand for construction equipment
Technology paves the way for driving 3D development
What is 3D modelling and what is it used for? Discover more at SC&RA Workshop
PREVIEW: SC&RA Crane & Rigging Workshop
The 2021 Crane & Rigging Workshop will be held September 14-16 at the Hyatt Regency Chicago, USA
CONNECT WITH THE TEAM
Alex Dahm Editor, International Cranes and Specialized Transport Tel: +44(0) 1892 786 206 E-mail: alex.dahm@khl.com
Mike Posener Sales Manager Tel: +353 860 431 219 E-mail: mike.posener@khl.com
CONNECT WITH SOCIAL MEDIA