|Trevi S.p.A. Patent applications|
|Patent application number||Title||Published|
|20130195560||TOOLS AND METHODS FOR CONSTRUCTING LARGE DIAMETER UNDERGROUND PILES - Methods are provided for the creation of large diameter piles in all types of soils (cohesive, cohesionless or rocky), particularly for the construction of bulkheads made of juxtaposed or secant piles, while maintaining the deviation from the vertical well below the limit ≦2% required by European standard EN 1536. The invention reduces verticality errors, advantageously exploiting the accuracy provided by the directional drilling technology. Tools for implementing such methods are also provided.||08-01-2013|
|20130020129||METHODS FOR DIRECTING VERTICAL DRILLING - Methods allowing precise directional drilling are provided. Such methods include use of directional drilling equipment which include a drill string with a hollow bottom rod connected to a boring tool by means of an obtuse-angle connection piece or “bent sub”. In order to restore the verticality of the drilling a vertical borehole section (F) is formed and then a probe equipped with an inclinometer is lowered inside the bottom rod. The string may be rotated into four angular positions and the inclination values of the probe in each angular position are detected at the depth reached. The string is rotated so as to bring it into an angular position corresponding to the maximum inclination value detected. The string is moved so as to move the boring tool further downwards and the inclination of the probe is detected again in order to check that verticality has been reached.||01-24-2013|
|20120328368||METHODS FOR WATERPROOFING DEPOSITING SITES - An object of the present invention is to provide methods for laying a waterproofing layer which may be used for forming the bottom and the walls of depositing sites so as to comply, both in literal and in substantial terms, with the legal requirements. The aim is also to provide durable waterproof barriers which have a high mechanical strength, without discontinuity.||12-27-2012|
|20120012400||HEAD FOR INJECTING CONSOLIDATING PRESSURISED FLUID MIXTURES INTO THE GROUND - A head includes an outer cylindrical body with at least one upper inlet for fluids, at least one outlet side nozzle and at least one helical duct having a helical central line. The duct connects the upper inlet to the nozzle and imparts the fluid flowing through it a helical motion about the longitudinal axis of the outer body towards the nozzle. The helical duct is progressively tapered towards the nozzle and includes a terminal length of the duct which is radiused to the nozzle in a tapered manner, both when viewed in cross-sectional planes parallel to the longitudinal axis and tangent to the helical central line, as well as when viewed in cross-sectional planes perpendicular to the longitudinal axis.||01-19-2012|
Patent applications by Trevi S.p.A.