DEHUMIDIFICATION PROTECTING SYSTEM FOR MAIN CABLES ON SUSPENSION BRIDGES

摘要

A main cable with oval-shaped cross-section comprises two cables-elements (1.1), which are compacted by one compacting machine and fastened individually by bands (1.2), position holders (1.3), wrapping wires (1.4) wrapped by one wrapping machine and coatings (1.5). Between (1.1.), (1.4) and (1.5) appears a vent-way simultaneously a working surface (1.6) for dry air injection and moisture exhaustion all the way to the (1.1). Main features of the dehumidification protecting system are: I) Percentage of cable surface available for direct dehumidification touching is almost 50%, its dehumidification efficient is very high. 2) Positioning of the oval main cable can be variable: horizontal liking axis of the cable-elements with vertical or inclined hangers, vertical or inclined linking axis and hangers. 3) Simple arrangement of dehumidification plants: two on the pylon top, two in the anchor blocks and one in the stiffening girder near the central nodes. 4) Available also for improvement of protection and/or strengthening of main cable on existing suspension bridges. Structures of vent-way at all kinds of the clamps, central nodes and saddles as well as the special compacting machine are created in the invention.