Soft and hard combined traction method for long-cable installation of cable-stayed bridge

Abstract

The invention relates to a long-span cable-stayed bridge, in particular to a soft and hard combined traction method for long-cable installation of a cable-stayed bridge. The long-span cable-stayed bridge is characterized by at least comprising stayed cables, a cable-stayed anchor head, a thin tensioned pull rod, a rough tensioned pull rod, a soft drawing head, an auxiliary anchoring base plate, a soft traction self-locking tool anchor, a supporting lug, a soft traction steel strand, a lifting jack, a stayed-cable anchoring base plate and a stayed-cable anchoring nut. The bottom end of the thin tensioned pull rod passes through the auxiliary anchoring base plate and the soft traction self-locking tool anchor through the soft traction steel strand to be fixed with the bottom of the lifting jack; the lifting jack is started and draws the soft traction steel strand to perform reciprocating traction; the lifting jack is drained back and the rough tensioned pull rod replaces the soft traction steel strand for hard traction again; and when the cable-stayed anchor head enters a preserved anchoring port of the tower body, the tool nut is screwed and the stayed cable is anchored on the tower body to finish long-cable installation. The invention solves the difficult problems of large traction force, long traction distance and the like of long-cable installation.

Description

technical field

[0001] The invention relates to a long-span cable-stayed bridge, in particular to a long-span cable-stayed bridge superstructure construction process. When the long cable is installed, soft and hard traction are combined to realize the anchorage device at both ends of the cable-stayed cable. Cable installation soft and hard combined traction method. Background technique

[0002] In recent years, long-span cable-stayed bridges have been used more and more, and the continuous breakthroughs in spans have brought about constant updates in the length and weight of cable-stayed bridges. The general winch pulls the stay cable into the anchor box for anchorage, that is, the girder end of the stay cable is anchored first, and the technology of using the winch to pull the other end into the anchor box on the bridge tower for anchoring can no longer meet the requirements of long stay cable installation on traction force, Towing length requirements. Contents of the in...

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