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人字扒杆吊装法是双钓鱼法架设箱梁的一种,双钓鱼架设法以斜拉桥应力方式,力的使用合理,设备轻便,安装费用较低,准备工作时间短,只要操作得当,严格遵守规章制度,可收到事半功倍的效果。人字扒杆吊装法需要的机械简单,反应灵活,进场费用低廉,方法不受架设墩台高度和桥孔下地基、河流水文状态等条件的限制,不需要导梁、龙门吊等重型设备即可架设40m以下各种跨径、结构的桥梁梁板,扒杆的安装及移动比较简单,梁板在吊着的状态时,可适当横移,总的架设速度较快。该文结合靖远黄河大桥引桥吊装的施工,从技术场地等准备、人员组织、安全控制等方面介绍采用人字扒杆吊装法吊装35m箱梁。
Herringbone griddle hoisting method is a double fishing method to set up a box girder, double fishing shelves to try to cable-stayed bridge stress mode, the use of force reasonable, lightweight equipment, lower installation costs, preparation time is short, as long as the proper operation, Strict compliance with the rules and regulations, can receive a multiplier effect. Herringbone pole hoisting method requires simple mechanical, flexible reaction, low admission costs, the method is not erected abutment height and under the bridge hole foundation, river hydrological conditions and other conditions, do not need guide beam, gantry crane and other heavy equipment can be Erection of 40m below the various span, the structure of the bridge beam plate, pole rod installation and movement is relatively simple, beam hanging in the state, can be properly traversed, the overall erection speed. In this paper, the construction of the bridge approach of Jingyuan Yellow River Bridge is introduced, and the 35m box girder is hoisted by the miter strut hoisting method in terms of technical preparation, personnel organization and safety control.