Coatings Industry News

Main News Page


Genoa Bridge Opens 2 Years After Collapse

Wednesday, August 5, 2020

Comment | More

Italy’s Genoa San Giorgio Bridge officially opened to the public on Monday. The structure replaces the Morandi Bridge, which collapsed almost two years ago to the day, killing 43 people.

The total cost for the project came in around 290 million euros—about 200 million euros for the bridge replacement and another 90 million euros for the demolition of the Morandi.

Morandi Bridge Collapse

Late in the morning on Aug. 14, 2018, lightning struck the Morandi Bridge. At the time, 35-mile-per-hour winds were recorded with a thunderstorm moving through the area. A 200-meter (656-foot) section of the prestressed concrete span collapsed, killing 43 people and creating a gulf between two sections of the bridge.

The cable-stayed concrete bridge, also known as the Polcevera Viaduct, completed in 1968, was designed by Italian civil engineer Riccardo Morandi. According to the website Retrofutur, the bridge is characterized, as are other Morandi structures, by thin prestressed concrete girders and relatively few stays. Three A-shaped concrete pylons held four prestressed stays apiece. The website has chronicled numerous projects over the years to reinforce the structure, including steel sheaths over the concrete pylons.

SurkovDimitri / Getty Images

Italy’s Genoa San Giorgio Bridge officially opened to the public on Monday. The structure replaces the Morandi Bridge, which collapsed almost two years ago to the day, killing 43 people.

While experts believe that structural weakness and decaying steel rods contributed to the collapse, previous warnings about the condition of the bridge were issued years before disaster struck. For example, in 2012, the leader of Genoa's business federation noted that the bridge could collapse within 10 years. In 2011, a report from Autostrade per l'Italia, the operator of the A10 highway that ran over the bridge, warned of intense decay.

As for the legal case surrounding the disaster, 71 people were accused, ranging from managers to civil servants, involving more than 100 lawyers, 120 experts and 75 witnesses.

By November, officials announced that they had begun testing debris from the site to help determine what caused the collapse. At the same time, Genoa Mayor Marco Bucci announced that the demolition of what remains of the Morandi Bridge would begin Dec. 15, 2019, which would make way for a new overpass over the city.

In late June of last year, towers of the Morandi Bridge were demolished. According to the BBC, the two towers brought down amounted to around 4,500 tons of concrete and steel. Water tanks were also put around the tower bases to help prevent dust becoming an issue in the immediate area.

Ponte Morandi Design, Construction

In December 2018, officials announced that Italian architect Renzo Piano would be overseeing the structure’s replacement, using his own design which featured 43 posts, each one honoring a victim of the collapse.

According to reports, the design involved having a 3,600-foot-long main steel deck running across 20 spans, supported by 18 elliptical reinforced concrete piers placed at 164-foot increments. The exception was a set of piers that would be set 328 feet apart to account for the Polcevera River. Solar energy stored during the day is slated to power the bridge’s lights and lamps at night, which will cast light shaped like a ship’s sails.

Steel elements for the project were provided by Fincantieri, from its Genoa-Sestri Ponente shipyard, with work being distributed to other shipyards, as necessary. The steel deck was assembled in parts onsite.

Additionally, to ensure the tragedy never repeats, the bridge has also been equipped with its own monitoring system and a fleet of robots which will monitor the hull, should any alarming structural changes occur.

The structure has been designed to last at least 100 years.

By February, officials announced that work on the bridge’s replacement had surpassed the halfway mark, with 16 of the 18 40-meter-high (131 feet) columns—which are partially sunk 50 meters into the ground—constructed and seven out of 19 deck sections laid into place.

Although Italy experienced a lockdown in March due to COVID-19, reports indicate that strict safety measures were enforced so that the project could continue. According to CNN, during this time, only one employee tested positive in late March, and has since returned to work along with colleagues who had been in contact with him and had underwent a quarantine period.

maudanros / Getty Images

The total cost for the project came in around 290 million euros—about 200 million euros for the bridge replacement and another 90 million euros for the demolition of the Morandi.

The strict safety procedures including daily temperature monitoring, daily contact tracing, hand sanitizer distribution and social distancing, among others, were coordinated by RINA Consulting, which was brought onto the project has a project manager for the replacement.

Throughout the course of the project, RINA reported that it had underwent approximately 600 audits dealing with technical, quality, safety and environmental aspects of both the demolition and reconstruction plans; was subject to 2,000 inspections at production plants and onsite; and generated 3,000 technical documents.

In April, joint venture Pergenova, made up of construction and civil engineering business Salini Impregilo and shipbuilder Fincantieri, announced that the final span for the Morandi Bridge replacement project had been installed, marking the imminent completion of the new infrastructure.

Completion

The inauguration was announced in June, when Pietro Salini, CEO of Salini Impregilo, became the first person to drive across the new structure.

While the new bridge was built in just 15 months, the opening was reported as “bittersweet” for some residents, who have pointed to the government ignoring that the Morandi needed repairs.

“We are glad for the new bridge, built so fast, and the maintenance on the highways, but it all also leaves us a bitter feeling,” said Egle Possetti, spokeswoman for a group of the victims’ families. “Had they done it before, our relatives might have been alive.”

During the opening ceremony, Marco Bucci, Mayor of Genoa and commissioner for the project, said: “We did it, we did what we promised to do 18 months ago. This is a beautiful thing for Genoa. But our first thoughts must be with the victims and their families ... Our administration has supported the relatives along the way. This [tragedy] must never happen again.”

In the aftermath of the collapse and other transportation troubles, Italy’s Transportation Ministry ordered inspections of all the region’s overpasses and bridges—all of which were found to need some form of repair.

   

Tagged categories: Bridges; Bridges; EMEA (Europe, Middle East and Africa); EU; Government; Health and safety; Infrastructure; Maintenance + Renovation; Safety

Comment Join the Conversation:

Sign in to our community to add your comments.


Advertisements
 
SAFE Systems, Inc.

 
KTA-Tator, Inc. - Corporate Office

 
Strategic Materials Inc.

 
Tarps manufacturing, Inc.

 
DeFelsko Corporation

 
Sauereisen, Inc.

 
 
 

Technology Publishing Co., 1501 Reedsdale Street, Suite 2008, Pittsburgh, PA 15233

TEL 1-412-431-8300  • FAX  1-412-431-5428  •  EMAIL webmaster@paintsquare.com


The Technology Publishing Network

PaintSquare the Journal of Protective Coatings & Linings Paint BidTracker

 
EXPLORE:      JPCL   |   PaintSquare News   |   Interact   |   Buying Guides   |   Webinars   |   Resources   |   Classifieds
REGISTER AND SUBSCRIBE:      Free PaintSquare Registration   |   Subscribe to JPCL   |   Subscribe to PaintSquare News
MORE:      About PaintSquare.com   |   Privacy Policy   |   Terms & Conditions   |   Support   |   Site Map   |   Search   |   Contact Us