Thanks for replying.
Could you confirm that the depth of the soft pile is irrelevant? If the soft pile is the same depth as the reinforced pile the soft pile is treated as lagging and the reinforced pile evaluated for spacing center to center of reinforced piles.
I have someone stating...
Use caution with the "2p" in the equation which is for rigid / non yielding walls.
For flexible walls (sheet and soldier pile) "1p" may be appropriate.
For semi-rigid, 1.5p.
I found a few threads somewhat related which I will post links for convenience.
http://www.eng-tips.com/viewthread.cfm?qid=360274
http://www.eng-tips.com/viewthread.cfm?qid=252351
For a secant pile wall:
1.) How is the wall typically analyzed?
2.) How is the unreinforced section checked...