06-08-2015, 06:17 AM
This helps illustrate dynamic force. Link to video at bottom.
Subject: FW: To my engineering and construction friends
Engineering Made Easy !
A short video of a Pakistani pile driving construction technique. Notice that the pile driving only becomes effective when the extra man jumps on. Very finely tuned! The chant is also catchy!
If you want to analyze the engineering here:
6 men x 180 lbs = 1080 lbs static force. Jumping up and downwill 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 square inches. 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 max.pressure/thump to 1600 psi for a 7 man team.
Quite good and will penetrate hard clay and sandy soil but not hard rock!
Pretty ingenious AND doesn't cost a whole lot!
Click on the link for video.
Perhaps if this technique was used, the veterans hospital construction project in Denver wouldn’t be a billion dollars over budget.
https://www.youtube-nocookie.com/embed/c...Kypg?rel=0
Subject: FW: To my engineering and construction friends
Engineering Made Easy !
A short video of a Pakistani pile driving construction technique. Notice that the pile driving only becomes effective when the extra man jumps on. Very finely tuned! The chant is also catchy!
If you want to analyze the engineering here:
6 men x 180 lbs = 1080 lbs static force. Jumping up and downwill 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 square inches. 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 max.pressure/thump to 1600 psi for a 7 man team.
Quite good and will penetrate hard clay and sandy soil but not hard rock!
Pretty ingenious AND doesn't cost a whole lot!
Click on the link for video.
Perhaps if this technique was used, the veterans hospital construction project in Denver wouldn’t be a billion dollars over budget.
https://www.youtube-nocookie.com/embed/c...Kypg?rel=0