  We present a formalism for high energy soft processes, mediated by Pomerons,
which embodies pion-loop insertions in the Pomeron trajectory, rescattering
effects via a two-channel eikonal and high-mass diffractive dissociation. It
describes all the main features of the data throughout the ISR to Tevatron
energy interval. We give predictions for soft diffractive phenomena at the LHC
energy, and we calculate the different survival probabilities of rapidity gaps
which occur in various diffractive processes.
