No-catwalk cableway erecting method for main cable strands of suspension bridge

Abstract

The invention discloses a no-catwalk cableway erecting method for main cable strands of a suspension bridge and relates to the technical field of mounting and construction of main cables of the suspension bridge. The no-catwalk cableway erecting method includes steps of erecting a bearing traction cable hung with a plurality of cable holders and connected with a traction device; mounting a linear stable cable and a linear counter-drawing device on segments of the bearing traction cable and keeping a linear form of the bearing traction cable above a preset position above a hollow cable linear form of the main cable; stretching the main cable strands in a cable stretching area by a cable stretching plate, and fixing the ends of the stretched main cable strands in a holder at the lower end of the pre-mounted first cable holder; driving the main cable strands along the longitudinal motion of the bridge by the bearing traction cable under the action of the traction device, stretching the main cable strands continuously and stopping until all the main cable strands are completely stretched and longitudinally move the main cable strands to the pre-mounted position; mounting the tower top sections of the main cable strands into saddles, and dragging the main cable strands at the beam ends into anchorage by the cable head traction device.

Description

technical field [0001] The invention relates to the technical field of installation and construction of main cables of suspension bridges, in particular to a cableway erection method for main cable strands of suspension bridges without catwalks. Background technique [0002] At present, the method of erecting the cable strands of self-anchored suspension bridges is to first install catwalks, set up longitudinal slides on the catwalks, install load-bearing cables and traction systems, and then pull the strands along the longitudinal direction of the bridge from one bank to the other. In the process of longitudinal traction on the catwalk, the cable strands are supported at multiple points by the rollers on the catwalk, and must pass through the saddle repeatedly. [0003] This construction method will encounter the following problems during construction: the cable strands are prone to twist when they are released from the cable tray; All of them were completed by high-altitu...

AI Technical Summary

Problems solved by technology

[0003] This construction method will encounter the following problems during construction: the cable strands are prone to twist when they are released from the cable tray; All of them were completed by high-altitude operations on the catwalk, and the conditions for cable extension were poor; the force on the strands was complicated during the traction process. The slideway takes a long time to install and the work efficiency is low; during the traction process of the cable strands, the strands are easy to twist, the working space on the catwalk is small, and the safety risk is large; the catwalk must be installed before the cable strands are installed, and the catwalk must be removed after the main cable is installed , time consuming and costly

Images