Posted on 05/15/2015 9:04:25 AM PDT by shove_it
Here's a construction technique that would be handy to know. Read the calculations below then click on the link at the bottom of the article to see this technique in action.
Here's something to cheer up any engineer. Just to put you in the picture and keep you up-to-date with the latest developments. Below is a link to a short video of a Pakistani pile driving construction technique. Notice that the pile driving becomes effective when the extra man jumps on. Very finely tuned! The chant is also catchy.
Now, let's analyze the Engineering here: 6 men x 180 lbs. = 1080 lbs. static force Jumping up and down will create a 3 times dynamic effect = 3240 lbs./jump = 1.6-ton thumps if the pile is tapered to 2 in. x 2 in., cross section at the tip = 4 sq. in. So, dynamic pressure/thump at pile tip = 3240/4 = 800 psi. "Add a man" feature will increase to 950 psi, so buy the option! Increase the chant and dynamic force goes up to 5 times to bring maximum pressure/thump to 1600 psi for a 7-man team. Quite good, and it will penetrate hard clay and sandy soil but not hard rock! The foreman is the guy on the tambourine.
https://www.youtube-nocookie.com/embed/cFb0nLCKypg?rel=0
Pakistanis doing the work that even Mexican refuse to do!
They still use bamboo as staging and carry concrete in buckets on top of their heads, too, don’t they?
Cheaper than a machine.
Those aren’t 6, 180 pound men.
It’s called getting the job done. Reminded me of the railroad repair crew (all black men) aligning track the old fashioned way, by hand - almost a musical rhythm to it.
Now I know what a "Pakistani piledriver" is.
Driving piles is a great deal easier in a Pakistani septic field than in most other places.
That’s Thailand. Probably around Bangkok. Buildings sink in the mud.
OSHA would love it..
Good example of the micro economic principle that labor and capital are interchangeable. In places like Pakistan where labor is cheap and the capital to buy a pile driver is very expensive you make do with labor. Besides a dancing workforce is a happy workforce. I wonder if a fat guy could demand higher pay for pile driver work?
Indeed, those men are called Gandy Dancers.
And a great deal more disgusting, I would imagine.
Pakistan? Seems more like Thailand or Indonesia.
AWESOME. A testament to human ingenuity.
On a personal note I did a small project in India (Chandigarh not far from the Pakistani border) I needed to lift a heavy item off a truck and move it about 300 yards to the installation area. I talk to the foreman and he says “just wait here a minute and I will take care of it.”
A small army of Indian laborers with bamboo poles and pipes appear out of no where, pick up the pallet, and walk it down where it needs to go. I think he paid total of $20 for about 40 men.
How did we make it so far?
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