Gantry with auto-adjusting prestressing

摘要

A gantry for use in the construction process of bridges, viaducts and other structures is disclosed. The gantry is equipped with a system that automatically adjusts the pre-stressing of the gantry's structure (1) in accordance with external actions being applied on it when loadings occur. The adjustment of the pre-stressing is achieved through the use of a controller (6) that receives signals from at least one sensor (2) that monitors the structure, and activates at least one actuator which alters the tension of the structure's pre-stressing cable or cables (5). A large amount of pre-stressing is able to be applied without undesirable deformations arising in the main structure (1) when exterior loads are not applied.