Direction of the arching of secant piles

[HanStrulo]

Hi Everyone.

I am trying to understand something that a colleague of mine said it happens to secant walls.

As you can see from the sketch, the secant wall has an earth pressure applied to it and my colleague said it will arch in the direction that is shown. I find it counter intuitive to imagine that since i am used to beams bending in the direction of the load.

could anyone help me understand how this works? any literature i could read to understand this?

Thanks

 

[GeoPaveTraffic]

While the beams will deflect, they are stiffer than the soil. Therefore the load will tend to arch to the stiffer piles as shown.

Mike Lambert

 

[HanStrulo]

do you have any examples of this to help me understand it?

 

[PEinc]

I have never seen secant pile walls with double primary (unreinforced) piles between the reinforced, secondary piles. The single, unreinforced, primary pile acts a "lagging" to span between the alternating secondary piles. I have seen and used only walls with alternating reinforced and unreinforced piles.

https://www.keller.co.uk/expertise/techniques/secant-pile-walls

http://www.PeirceEngineering.com