Preloading system for massive concrete construction including bridges uses external cable passing through sleeve bolted to plate on surface of concrete with rod running through bore to anchor on other side

摘要

The cable (7) passes through a bush (8) made of polyethylene held in a metal tube (6). The cable is under tension and bends through a small angle as it passes through the tube. Steel lugs (5) on the tube have apertures accommodating a pivot bolt (4) engaging lugs attached to a baseplate (9) on the front surface of the concrete construction (10). Screws with dowels (3) engage in blind bores in the concrete to hold the baseplate in plate. A bore (11) through the concrete accommodates a rod (2) attached to an anchor (1) on the rear side of the concrete.