Soldier H Pile Rock Socket Analysis for Review

[cap4000]

Assuming the bedrock to be massive, unjointed with the strength of 4000 psi concrete check out page 3 of this link for its load distribution.

http://www.ncree.org.tw/iwsccc/PDF/08 - Shahrooz.pdf.

Its assumes moment equilibrum with a linear elastic stress and strain distribution per the ACI Code. The AASHTO model for Soldier Pile in rock looks nothing like it. Most of the rock socket load would be taken up right below the top and just above the bottom of the H Pile embedment. Note that 2.5 times the HP flange width is the max width for load distribution. Seems real rational to me for a solid rock condition. Any feedback would be appreciated.

 

[PEinc]

I'm not sure why ACI would need to be involved in a soldier beam design. The basis of the embedment design is that the soldier beam is bearing on concrete which is totally in compression against the dirt or rock. The soldier beam is resisting any bending in the embedded length. Perhaps ACI is making this more complicated than necessary?

 

[cap4000]

PEinc,I am just trying to say the force distribution in the rock socket per AASTHO's diagram show a uniform load on one side and a F force right at the toe is probably wrong but safe anyway. The moment reactions which are very high are separated by 0.75+/- and are not totally uniform per AASHTO. Strictly a comparsion of how fixed ends stabilize
a large shear force and a moment. I am assuming the rock as concrete as ACI has nothing to do with soldier pile design.

 

[cap4000]

PEinc,I am just trying to say the force distribution in the rock socket per AASTHO's diagram show a uniform load on one side and a F force right at the toe is probably wrong but safe anyway. The moment reactions which are very high are separated by 0.75+/- and are not totally uniform per AASHTO. Strictly a comparsion of how fixed ends stabilize a large shear force and a moment. I am assuming the rock as concrete as ACI has nothing to do with soldier pile design.

 

[PEinc]

Sorry, but you lost me. What F force at the toe? What is a moment reaction? What is the 0.75 separation?

 

[cap4000]

PEinc

In my first post there is a pdf link. Check page 3 and see the elastic loading condition that was verified thru strain gauges. The AASHTO model is for discrete wall elements embedded in rock. That AASHTO model has been a subject of many negative posts on this site. You can check out thread #153283. The 0.75Le is the separation of forces on each end of the H Pile embeddment in this hypothetical case.