Ahmed, I haven't ever seen tied expansion joints (I think you means lateral expansion joints with tie rods for pressure thrust containment) with gap on tie rods: It could be a very special expansion joint (?)
Perhaps the tie rods are only installed for transportation issues and they have to be removed before use? In this case it could be not a tied expansion joint, but a simple axial expansion joint, and the values indicated for axial and lateral displacements could represent admissible values.