CONSTRUCTION METHOD OF CABLE-STAYED BRIDGE ABOVE SEA NAVIGABLE STRAIT Russian patent published in 2017 - IPC E01D21/00 

FIELD: construction.

SUBSTANCE: when testing in construction of span bridge almost complete safety of each full cycle of supply of beams for mounting is provided, as well as safety of personnel occupied in these operations. Essence: special method of towing of floating system (3) and applied equipment is used – tow type (5, 6), length of towing ropes (7, 8), special cleats (9, 10), floating ice mooring buoys (16), saith-hook (27), leading units (49). Casement signs (43, 44),made for specific operations. Maneuvering in operating zone of mounting and positioning for mounting lifting unit (37) are secured using instead of GPS, casement marks, installed in operating zone of bridge construction on both sides. Invention can be used for transportation of metal stiffening girders of bridge flight using floating system (3), its attachment by dead anchors (12) with help of floating ice mooring buoys (16) and saith-release gear (27) and subsequent positioning in operating zone of construction under mounting lifting unit, mounted on end of bridge cantilever at height of 70 m to lift beams at elongation of bridge cantilevers at both sides of spillage to their coupling. Time for one cycle of beam removing is decreased from 5–6 hours to two hours, which promotes clear and smooth running of bridge construction schedule and significant saving of funds.

EFFECT: technical result is reliable and safe all operations in process of implementation associated with loading of metal beams of bridge flight, such as transportation of floating system, its fixation on dead anchors with further positioning of floating system for mounting lifting unit in difficult weather conditions, including wind, storm excitement, change of currents with semidiurnal nature and operating under significant angle to axis of bridge, as well as impact of ice, broken by passing vessels and brought out by current.

11 cl, 14 dwg