METHOD FOR CREATION OF BRIDGE SPAN STRUCTURE Russian patent published in 1999 - IPC

FIELD: bridge building industry. SUBSTANCE: according to method, ends of bridge span structure are fastened on supports together with turning shafts with ropes and tensioning devices. Shafts are made with spiral recess or with spiral multiple-thread groove. Shafts are fastened on supports parallel to each other and perpendicularly with respect to bridge route. After that, shafts are connected by means of endless rope with tensioning device. Rope is wound on shafts and is located in spiral recesses of shafts or shafts are connected by ropes, ropes are wound on shafts and are located in spiral multiple-thread grooves in shafts. In this case, used is corresponding number of ropes together with their tensioning devices. Tensioning device is made in the form of spring-biased roller. Application of aforesaid method for creating bridge span structure allows for unification of bridge span design, reduction of labour required for manufacture and erection of bridge, enhancing quality of erection operations at construction suite. EFFECT: higher efficiency. 1 cl