Dear Pablo,
Ok I understand that, being my loop buried it is no able to absorb expansion because the bends are not going to move being surrounded by soil.
However, What Can I do in order to reduce the displacements at firt above support? (client does not want anchor block or 5ND bends).

I think that I cannot obtain displacements at first above support less than those already calculated(100mm). then, I will pass this displacements to the piping and they will do their design calculation. (battery limit between me and piping is first above support and my model start at this point).