When buried piping is subjected to mine subsidence, the soil around the pipe drops vertically down and also moves axially and laterally in the horizontal plane.

Forcing the pipeline to match the horizontal soil displacements does not account for the slipping / flow of soil that would occur around the pipe. Do you use the soil spring restraint between the pipe and a cnoded displacement as the only "flow" effect or some other method?

I am interested to know how others model these horizontal soil movements in Caesar.