Soldier Pile in Rock - Shear Resistance Check!

[CBACC]

I have a project with permanent soldier H-beam wall with lagging. It is embedded into the bedrock below excavation via an oversized cored hole, filled with lean concrete (2.5 ksi). I have modelled this in L-Pile and have checked the bending resistance and the shear resistance. Bending is fine but the Shear diagram shows a massive increase into the rock portion which is 10x the active forces. The maximum moment occurs just before the rock. WHY DOES THE HIGH SHEAR OCCUR IN THE ROCK? Is this really what the shear diagram looks like? My H-Pile section fails when checked for shear resistance tolerance. I have been told that the reason for the massive increase in shear is due to the dissipation of the moment. I have been spinning my wheels on this concept for 2 days now. I figure this condition is just like a cantilever steel beam analysis with one end fixed.

 

[PEinc]

L-Pile does not analyze the soldier beams like a steel beam embedded in totally rigid material. L-Pile assumes that the shear and moment increase and then dissipate into the embedment material as a function of the stiffness of the embedment material. AISC's Table 3-23, Diagrams 18 and 19 assume that the embedment material is so stiff that the moment and shear are maximum and terminated at the face on the embedment material.

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