Brightline shaves almost a year from Florida rail project using precast tunnel system

Dive Temporary:

  • The $2.seven billion, one hundred seventy-mile Brightline high-velocity rail extension from West Palm Beach, Florida, to Orlando International Airport (OIA) will see the building of a practice tunnel in two months rather of just about just one calendar year many thanks to an progressive box-jack process prompt by normal contractor Granite Building. This is the first time the box-jack process will be used for a practice project outside of the Northeast United States.
  • The developer of the box-jacking process, Italian business Petrucco, is working with unique hydraulic jacks to press two precast concrete containers — one 146 feet prolonged and the other 126 feet prolonged and equally with forty two-foot-prolonged sidewalls — under a roadway east of the airport whilst an excavator digs out a path from within the box and from the opposite facet. Each and every box weighs extra than 3,000 tons, and the set up will take a forty-individual crew working twelve-hour shifts all around the clock. 
  • Rail officials also plan on working with the box-jack process next calendar year to develop a second practice tunnel underpass together the South Florida-to-OIA route in Cocoa, Florida, staying away from shutting down targeted visitors for just about a calendar year in that locale as nicely. 

Dive Insight:

Typically used in Europe for rail building, the box-jacking technique was first used in the U.S. before this calendar year on the Extensive Island Railroad growth project in New York City. In this project, related precast concrete containers have been installed beneath roadways removing the want for at-quality railroad crossings. 

Richard Brown, project supervisor for Granite, which solid the containers on web-site, told Building Dive that standard tunneling was not an possibility on the Florida project for the reason that of the current grades of the roadway and the proposed track grades. In addition, regular building methods would have produced an close to 10-thirty day period detour for motorists, Brown mentioned, as opposed to the two-week detour that is now planned.

Over and above the Brightline project, Brown mentioned Granite will seem at box-jacking on potential jobs.

Granite’s $557 million part of the project is the 37-mile, Zone 3 section that runs from Cocoa to OIA, according to Brightline spokesperson Katie Mitzner. Other contractors on the work consist of:

  • Hubbard Building and Wharton-Smith Inc., which will perform web-site preparing and making on about 70 acres south of OIA, are the contracting staff for Zone one.
  • The Middlesex Corporation will manage web-site and infrastructure perform in Zone 2, which stretches 3 miles through the airport. 
  • HSR Contractors, a joint undertaking amongst Herzog, Stacy & Witbeck and RailWorks, will up grade close to one hundred thirty miles of current track in Zone four. This enhancement from Course IV to Course V track will let trains to travel up to a hundred and ten miles per hour.

Final thirty day period, Mitzner instructed Building Dive that extra than 750 personnel are now manning the growth and that the business expects to incorporate extra in the months forward. 

Operate on the expansion’s bridges and one hundred fifty five at-quality crossings is also underway. At the airport, contractors have laid rail and have broken floor on a 109,000-square-foot automobile maintenance facility.