Inclined piles in traction
Inclined piles in traction
(OP)
Need help from experienced or knowledgeable pile guys.
Piles in my project have vertical compression loads of about 2000 kN (say 500 kips), and traction loads of 1000 kN.
Depth to rock, which is not very good rock, is about 50 feet, and the piles will probably be 12 inch round tubes filled with concrete.
If the piles are inclined, will this increase the tension capacity wrt vertical piles ? Like an inclined nail is harder to pull ...
Each winter I anchor down my temporary garage with inclined 1" dia. pipes driven about 3 feet in the ground, and when I try to remove them in spring, I need to pull exactly along the axis or there is no way they will come out.
Piles in my project have vertical compression loads of about 2000 kN (say 500 kips), and traction loads of 1000 kN.
Depth to rock, which is not very good rock, is about 50 feet, and the piles will probably be 12 inch round tubes filled with concrete.
If the piles are inclined, will this increase the tension capacity wrt vertical piles ? Like an inclined nail is harder to pull ...
Each winter I anchor down my temporary garage with inclined 1" dia. pipes driven about 3 feet in the ground, and when I try to remove them in spring, I need to pull exactly along the axis or there is no way they will come out.





RE: Inclined piles in traction
Quite likely the behaviour is favorable as you think, for the normal forces induced along the piles' surfaces should lead to bigger friction, and you are also adding passive push to overcome, the sum of which may lead -depending on the configuration- to a higher limit or allowable load.
In a prestressed works' book combinations of inverted V pair of piles are said to be used to support alternate directions of tension-compression. It also warns of that raker or batter (inclined) piles (prestressed variety at least) are being discontinued for use in seismic areas due to poor performance when receiving the brunt of the seismic load at their tip, being now preferred sets of vertical piles able to develop swaying hysteretic behaviour.
RE: Inclined piles in traction
RE: Inclined piles in traction
Michael.
Timing has a lot to do with the outcome of a rain dance.
RE: Inclined piles in traction
RE: Inclined piles in traction