Erection of gantry type small-cycle traction system on large-span suspension bridge main cable
A traction system and suspension bridge technology, applied in bridge construction, erection/assembly of bridges, bridges, etc., can solve the problems affecting the erection speed and quality of the main cable, the "pair-pull" of the main and auxiliary winches, etc.
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[0031] The overall construction and erection plan: the erection of the main cable adopts the PPWS construction method, that is, the cable reel (24) is installed on the cable-laying support behind the A anchorage, the anchor head is drawn out from the cable reel, and the anchor head is fixed on the dragging head through the anchor head frame. The puller (7) is connected with the traction cable (10), and the 25t traction hoist (15) arranged on the downstream side of the B anchorage (14) drives the circular traction cable (10) to move forward, and the strands are pulled from A Anchor anchorage (11) drags along catwalk towards B anchorage anchorage (14), pulls a bundle at a time, and cable strand falls on the supporting guide wheel arranged along catwalk. During the traction process, the torsion, bending and loose deformation of the cable strands should be corrected in time. After the cable strands are dragged in place, the anchor heads at both ends are temporarily fixed on the an...
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