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:
Construction Junkie has shared a lot of demolition videos. Typically, people line up waiting for the moment when the building explodes with their eyes peeled and cameras ready, just waiting for the perfect video. This video, however, is much different.
Doing something in the name of revenge typically is never a good idea. Concrete truck operators getting involved with that revenge is probably an even worse idea. But, anger makes people do weird things, including video taping said revenge.
As harmless as it looks, dirt can be one of the biggest hazards on any construction site. It’s heavy and is bound to collapse without warning unless proper safety measures are taken into account. Landslides are essentially no different than trench collapses, without proper shoring or sloping, you could be putting worker’s lives in danger.
Nobody likes having something stolen from them, obviously, but some people are also more willing to go to extreme lengths to get their items back. Construction sites are hot targets for thieves, because there’s typically thousands of dollars worth of tools and material on site at any time. On one construction site in Dallas, an alleged thief thought he was going to snag a tool from the site and drive away safely, but several construction workers had a different thought in mind.
Other than at the zoo, there aren’t many options for Americans to come into contact with a rhino. It’s also becoming increasingly rarer to come into contact with them in their native countries. Black rhino populations, like other rhino species, have fallen drastically since 1970. Savetherhino.org estimates that in 1970, there were around 70,000 black rhinos in Africa, but now there are only around 5,000.
Remote sites have extreme challenges, like finding enough staff to work the jobs and being able to get materials to the site. Large mining operations have turned to self-driving dump trucks, like this 320 Ton mega machine, for a few years now. But, Lockheed Martin, a giant in the world of global security and aerospace, has a different solution for remote sites.
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.