Nobody likes traffic, especially when lane closures and construction are involved. Construction zones are prone to increased accidents, which also put construction workers in extreme danger. The best way to reduce traffic, accidents, and worker injuries is to reduce the on-site schedule, but how do you go about doing that?
The Connecticut Department of Transportation (CDOT) needed to overhaul its highly trafficked Route 8 in Bridgeport, CT which included several bridges. The bridges, which were built in the 1970s, handled over 88,000 vehicles per day and had degraded to a point that the CDOT determined the bridges had reached the end of their useful life. The original estimated schedule for the bridge overhaul was 2 years, which officials determined would be way too long to displace that amount of traffic, so they looked for alternative methods. In the end, the CDOT opted for a Design-Build concept with Manafort Brothers, Inc. and Parsons Brinkerhoff which would ultimately reduce the total on-site work schedule to two 14-periods over the summer of 2016.
The $35 million project not only used Design-Build to shorten the schedule, but also employed the Accelerated Bridge Construction (ABC) technique. To further reduce the schedule, the ABC method utilized Prefabricated Bridge Units (PBUs), which were large sections of the bridge that were fabricated off site. Once substantial completion of the PBUs was reached, the on-sire work began. Each 14 day period wound up closing one direction at a time, which shifted traffic to the opposite side. The new bridges are close to being complete now, with a finish date set for September 2016 and the DOT is hoping that maintenance of the new bridge will be significantly reduced compared to the old bridge. According to the website set up for the Route 8 construction, the bridge design incorporated “modern weathering steel beams that require no paint or maintenance over their anticipated 75 year lifespan.”
While it’s not quite as fast as this this multi-lane overpass that was removed and replaced in 43 hours in China or this 230 foot long tunnel installed under a highway in the Netherlands in just 3 days, it’s definitely a step in the right direction for improving contractor efficiency and public safety.
You can watch a timelapse video of the demolition of the old bridges and the construction of the new, uploaded to Youtube by CME Associates, below:
Early this year, a landslide caused catastrophic failure to the Pfeiffer Canyon Bridge along California’s famous Highway 1. California Transit officials closed the bridge on February 21st and announced it would be demolished and replaced. Time is of the essence as US News reports that over 400 residents are stranded on one side of the bridge and helicopters have had to bring in food for them. The residents are still able to use the footpaths in the area to cross the canyon.
If you’re into heights, then China may be the place you need to be. The country recently unveiled the world’s highest and longest glass bridge and, as scary as many tourists may find that, it was way more dangerous while it was under construction. New footage of another construction site in the Laowang Monutains is giving that bridge a run for it’s money.
There’s no doubt that bridge demolitions by implosion are extremely fun to watch, but the fireworks show and big splash into the water below can sometimes overshadow other demolition projects that don’t allow implosion. Priestly Demolition Inc. (PDI) recently won two 2016 World Demolition Awards for one of those projects where implosion was not an option and they have also produced an incredibly detailed video of how they did it.
Since Construction Junkie was conceived in 2015, we’ve seen a lot of construction equipment flip for some really stupid reasons. Like this crane, this other crane, and this third crane dropping a bulldozer. Those are just some of the ones caught on video and they should be enough to convince you not to go out of your way to do dangerous things with a crane.
Rowlett, Texas was hit hard by a tornado in 2015 and the city is still dealing with the effects of it. In the horrible storm, 13 people were killed and over 400 buildings were damaged or destroyed, according to CBS DFW. In a story we covered last year, one Rowlett woman also had her house mistakenly knocked down by a demolition company when addresses got mixed up after the tornado.
In an incredible fight for his life, excavator operator Daniel Miller, of Australia, spent 2 long hours trapped by his excavator with only his nose and forehead above water. Amazingly, the man survived and his wife says it was due to his sheer mental strength and will to survive.
Cranes are a staple of many construction sites throughout the world, but they’re susceptible to damage caused by sudden bursts of high wind. Winds were blamed for the collapse of the New York City crane collapse that killed one man and injured 3 others in 2016 and again for the devastating crane collapse in Mecca, which killed over 100.
Much like the stories above, a crane collapsed last week in Dubai, UAE, after sudden heavy winds burst through town.
You might be operating some big machines on your construction site, but, chances are, none of them can come close to the Bagger 288 bucket wheel excavator. There’s probably an excavator on your job site right now, but imagine the work you could get done if you have a machine with 18 buckets, each with a capacity of 6 tons. That’s the capacity of the massive 30 story tall ThyssenKrupp Bagger 288 bucket wheel excavator.
We saw some pretty awesome demolition videos in 2016, like this super slow motion bridge demolition and this video of 116 excavators working side by side to demolish an overpass overnight, but this new video is already on top of the leaderboard for best demolitions of 2017.
Steel rebar, the world’s favorite reinforcement material for concrete, greatly increases tensile strength in concrete. Due to concrete’s rigidness and tendency to shrink and expand, reinforcement is necessary in many cases to reduce cracking and slow structural failure. This material is elementary to most of throughout the construction industry, but what you may not be familiar with is how much stress steel rebar must be under before it completely snaps in half.