ABSTRACT
Investigations have been also realized to control the grouting effect into the masonry walls, using two seismic techniques. The objective herein was to propose a simple survey methodology which gives information for the mechanical characterization of the materials inside the structure.This approach includes some sonic 2D travel time tomographies that present the advantage to describe a section of the structure, and may illustrate the nature and the geometry of its interior (stone blocks, fillings, . . . ). A first campaign using this technique has been undertaken in non injected and semiinjected areas, as well as in injected ones. A second campaign is still in progress comprising the repetition of the tomographies after the completion of the injections. Furthermore, these few tomographies permit the understanding and calibration of the behaviour of exhaustive Vp transmission measurements that can be practiced over the major part of the structure.
