METHOD AND COATING FOR WATERPROOFING OF BRIDGES AND SIMILAR STRUCTURES INTENDED FOR RAIL TRAFFIC

摘要

Method for waterproofing bridges and similar structures intended for railway traffic, including an arched or deck structure, on which there is a ballast (M) consisting of gravel or crushed stone (2) on which one or more tracks extend (6). The method involves: the detection of the surface and shape of the bridge area (1); the reconstruction, using the data of the survey carried out, of a model area having characteristics of shape and size similar to that of said area of the bridge (1); the spray application, to cover the aforementioned model area, of one or more layers of polyurea added with suitable reagents and additives designed to solidify it, incorporating in it a fabric with a support and reinforcement function; the polymerization and solidification of the polyurea and the reinforcing material in a single mat (10) of the desired thickness; removing the tracks (6) and a layer (S) of gravel or crushed stone (2), for a predetermined depth; the drafting of the mat (10); the repositioning of the layer (S) of the gravel or crushed stone (2) on the polyurea mat (10), to rebuild the ballast (M); reinstalling the tracks (6).