I am under Ph.d course now. Personally I have great interest in the behaviors of laterally loaded pile.
I have been trying to understand the soil response curves. COM624P and LPILE computer programs were useful for me. Nevertherless,I'm not free for conceptual understanding yet. Especially, the way of establishing p-y curve in multi-layered ground system is always doubt..how to apply soil strengthes and estimate the ultimate soil resistances. The procedure, of course,can be found in the book such as COM624P manual. However, calculations by hand say quite differ from those program calculations. In a certain case, LPILE and COM624P showed me different results.
Where I can get it exact solution ? If anyone tell me I really appreciate.
Certainly the best people to answer your questions on conflicting results from software are the designers of the software themselves. While I have no personal experiece on the other software mentioned, Ensoft Inc. (the company that created L-Pile and other engineering software) always gives support on how to use their software and would most likely be able to answer your questions. You can email Shin-Tower Wang at email@example.com for more information or call them directly. Their website is www.ensoft.com Good Luck!