Excavators aren’t typically meant to be dropped down to a lower level, but certain circumstances require it sometimes. The machines are obviously extremely heavy, so a large crane and proper rigging is required for it to happen safely. As a construction firm in Hong Kong, China recently found out, though, it’s a little tougher than it seems.
While attempting to lower an excavator down an access shaft to the location of a highway tunnel currently under construction, the excavator begins to flip and then free falls all the way to the bottom of the shaft.
Based on one camera angle, it appears that the excavator falls for approximately 4 seconds, and, by using a calculation of the standard speed of gravitational acceleration ::pushes up glasses:: we can assume that the shaft was at least 250 feet deep.
Here’s a picture of the aftermath:
Excavator breaks loose from crane, plunges down giant shaft at Hong Kong highway construction site https://t.co/n1WTZZceT8 pic.twitter.com/ENYxmwlrs4
— AsiaOne (@asiaonecom) October 15, 2020
Thankfully, no one was injured in the incident, but someone has some ‘splaining to do.
According to Yahoo, the overall project includes a 4.7 kilometer long, dual three-lane highway and is expected to cost about $5.5 billion. Estimated completion is in 2025.
Enjoy two different angles of the incident, posted to YouTube by Alita Battle Angel, below:
source https://www.constructionjunkie.com/blog/2020/11/11/video-check-out-this-excavator-free-fall-down-a-huge-underground-access-shaft
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