基于可滑移底模工艺的异形底面先张法桥面板预制技术分析  

Research on Key Technologies for Prefabricating Special-Shaped Bottom Pre-Tensioned Bridge Deck Panels Based on the Slippery Bottom Formwork Process

作　　者：蒋莽 吕建伟 阳海燕 JIANG Mang;LV Jian-wei;YANG Hai-yan(Hangzhou Transportation Administrative Law Enforcement Team,Hangzhou 310014;Hangzhou Highway and Port Management Service Center,Hangzhou 310014;Zhejiang Communications Construction Group Co.Ltd,Hangzhou 311100,China)

机构地区：[1]杭州市交通运输行政执法队,浙江杭州310014 [2]杭州市公路与港航管理服务中心,浙江杭州310014 [3]浙江交工集团股份有限公司大桥分公司,浙江杭州311100

出　　处：《浙江交通职业技术学院学报》2024年第3期27-31,共5页Journal of Zhejiang Institute of Communications

摘　　要：钢板组合梁桥能够在跨河、跨结构物等有障碍物阻挡时,发挥巨大优势。本文提出了一种钢板组合梁先张法预制桥面板装配式施工关键技术,能实现异形底面变截面桥面板的预制工厂化、机械化、流水化作业:利用专用钢筋绑扎胎架、预应力筋定位齿板及整体吊具,解决了狭小空间下钢筋及预应力筋精确定位的难题;通过异形可滑移式先张法底膜和千斤顶可调节放张平台,实现了预应力放张时桥面板与底模位移同步。Steel plate composite girder bridges can exert significant advantages when there are obstacles such as rivers and structures blocking the way.This paper proposes a key technology for the assembly construction of precast bridge decks of steel plate composite girders using the pretensioning method,which can realize the prefabrication industrialization,mechanization and flow-line operation of special-shaped bottom variable cross-section bridge decks:By using a special steel bar binding jig frame,prestressed tendon positioning tooth plates and an integral crane,the problem of precise positioning of steel bars and prestressed tendons in a narrow space has been solved;Through the special-shaped slidable pretensioning method bottom formwork and the adjustable release platform of the jack,the synchronous displacement of the bridge deck and the bottom formwork during the prestressed release has been achieved.

关 键 词：钢板组合梁 可滑移底膜 异形底面 先张法桥面板 

分 类 号：U448.2[建筑科学—桥梁与隧道工程]