三维空间索面主缆架设施工技术

发布时间：2018-06-14 08:25

本文选题：悬索桥 + 主缆架设　；参考：《世界桥梁》2017年03期

【摘要】：松原市天河大桥北汊主桥为主跨266m的双塔三跨自锚式悬索桥,主缆为三维空间索面。猫道施工采用已架设钢梁作为工作平台,在其上进行整体预制吊装预拉猫道承重索,安装U形横梁,铺设面层网,安装踏步方木、扶手索、侧网,并通过塔顶门架进行吊装施工。主缆架设采用PPWS法施工,利用牵引系统由南向北架设主缆。为了控制由于主索鞍平弯及竖弯引起的主缆鼓丝,索股入鞍采用由主索鞍中心向两侧出口的施工顺序,并控制四边形整形器的间距,保证鞍槽内的主缆平顺、不发生扭转现象,抑制主缆鼓丝的产生。主缆索股架设完成后,进行主缆的紧缆、索夹及吊索安装施工,达到设计的成桥主缆线形。
[Abstract]:The north branch main bridge of Tianhe Bridge in Songyuan City is a self-anchored suspension bridge with two towers and three spans with a main span of 266m. The main cable is a three-dimensional cable plane. The catwalk construction uses the steel beam which has been erected as the working platform to carry on the integral prefabricated hoisting of the catwalk load bearing cable, the installation of U-shaped crossbeam, the laying of the surface layer net, the installation of the stepping square wood, the handrail cable, the side net, And through the tower roof gantry hoisting construction. The main cable is constructed by PPWS method, and the main cable is erected by the traction system from south to north. In order to control the main cable drum caused by the flat bending and vertical bending of the main cable saddle, the cable strands entering the saddle adopt the construction sequence from the center of the main cable saddle to the outlet of the two sides, and control the spacing of the quadrilateral shaper to ensure that the main cable in the saddle trough is smooth without torsion. Inhibit the production of the main cable drum wire. After the erection of the main cable strands, the main cable tight cable, cable clamp and sling installation are carried out to achieve the design of the main cable line of the bridge.
【作者单位】：中建六局桥梁有限公司;
【分类号】：U445.4;U448.25

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