One of the challenges with construction is determining how your work can and will affect the existing conditions surrounding your job site. That’s why it’s increasingly important to not only perform proper due diligence procedures, but also react to the findings. That, unfortunately, doesn’t always happen and could potentially be what caused a massive sinkhole in Fukuoka, Japan, last week.
Around 5:15am local time, a 98 foot (30m) by 88 foot (27m) section of roadway was completely swallowed by a sinkhole. As crews were working on an underground subway line directly beneath the road, groundwater began to flow into the tunnel, according to the Asahi Shimbun. Shortly after, the road above began to collapse, exposing a flowing sewer line under the pavement. Luckily, no injuries were reported, but hundreds of residents and businesses were without power or gas, as the nearby utilities were compromised. Due to fear of the sinkhole growing, city officials ordered the hole to be filled in later that afternoon.
Perhaps even more astonishing, repairs have been made to all the utilities and the pavement in a week’s time, as the road was opened back up to the public on November 15th. After the hole was filled in, it only took crews 48 hours to repair the utilities and re-pave the roads, according to CNN. The 50 foot (15m) deep hole took roughly 8,100 cubic yards (6,200 cubic meters) of a sand and cement mixture, which the mayor of Fukuoka says is now 30 times stronger than before, reported the Guardian.
The video below was uploaded to Youtube by ODN:
While placing concrete on the 7th floor of a new hotel in Houston, TX, 16 construction workers were suddenly sent falling to the 6th floor below, sending 9 of them to the hospital, according to local news reports.
As a storm blew through the Dallas, Texas area on Sunday afternoon, a tower crane standing near an occupied apartment building collapsed causing at least one fatality and 6 injuries.
Completed in 1976, the CN Tower in Toronto, Canada held the record for the tallest freestanding structure in the world from 1975-2007, until it was supplanted by Dubai’s Burj Khalifa. At its highest point, the CN Tower, which is mainly used as a communications and observation tower, reaches 1,815.4 feet (533.33m). Last year, the tower underwent a $16 million renovation and Priestly Demolition shared a fascinating, in-depth video for how they took care of the demolition of the interior space and walls.
Cranes collapsing on-site are serious business, especially since many of them resulted in the loss of life. A recent crane collapse on a construction site in Alpharetta, GA was caught on camera after it caught fire, but luckily no one was injured.
There are a lot of different specialty construction contracting sectors within the industry and cruise ships are definitely one of them. There are plenty of unique challenges when dealing with a moving ship versus a static building. A recent accident highlighted the challenges when a crane collapsed on a cruise ship under renovations, injuring 8 people.
Demolitions by implosion can be fun to watch when they go right – or wrong – but nearby residents can be greatly affected by the high powered blasts and huge clouds of debris that follow. A few years ago, a botched demolition in England left dozens of nearby residents unable to return to their homes for several days. Last week, an obsolete Steel Basic Oxygen Plant in Weirton, West Virginia is leaving residents in a similar situation.
Over the years, Liebherr, the German Crane Manufacturer, has given us some absolutely amazing videos. For example, they put on a show for their best customers one year and lifted one crane with another crane, which was lifted by a third crane, which was then lifted by a fourth crane. Another video highlighted the 58 cranes that were on site at the same time at the world’s largest airport build in Istanbul. Well, the company is back at it again, this time on top of Europe’s new tallest building.