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JQ900B架桥机大坡度架梁工艺探讨

2017-11-30樊榴丽屈拓拓

中华建设科技 2017年10期

樊榴丽+屈拓拓

【摘要】西宝铁路客运专线因咸阳西立交特大桥的地理环境约束,施工设计从跨咸阳西上行联络线开始进入-20‰坡度。实际施工中机械设备(架桥机)是属于老式900T设备,由一、二、三号柱组成的双主梁门式起重机,一号柱支立在即将架设箱梁前端,二号柱和三号柱均支立在已架箱梁梁面。设计要求架桥机机臂(由一、二、三号柱支立于上端位置,它的水平即能说明一、二、三号柱是否水平)水平度不超出设计范围的7‰,要求一号柱垂直度在±15mm以内,这就严重制约了架梁、增加了架梁的不安全因素。铁路建设越来越倾向于理性、合理、环保以及可持续的能源发展。国家 “十二五”规划中不断将高铁、客专向各类地质、地形延伸,这也同时要求在高铁、客专建设过程中架桥机能满足不同地形的架设箱梁任务。

【关键词】架桥机;机臂水平;垂直度;安全因素

【Abstract】Xibao Railway Passenger Dedicated Line is bounded by the geographical environment of Xianyang West Interchange Bridge, and the construction design enters the -20 ‰ slope from the westward line of Xianyang West Line. The actual construction of machinery and equipment (bridge machine) is the old 900T equipment, by the first, second and third column composed of double main girder gantry crane, one column stand in the erection of box girder front, Pillars are supported in the frame beam beam surface. The design requirements of the bridge machine arm (from one, two, three pillars stand in the upper position, its level that can explain the first, second and third column is the level) level does not exceed the design range of 7 ‰, Column verticality within ± 15mm, which severely restricted the beam, an increase of the beam of unsafe factors. Railway construction is becoming more and more rational, rational, environmentally friendly and sustainable energy development. National "Twelfth Five-Year Plan" will continue to high-speed rail, passenger dedicated to all types of geology, terrain extension, which also requires high-speed rail, passenger construction process bridge function to meet the different terrain erection box girder task.

【Key words】Bridge machine;Arm level;Vertical degree;Safety factor

1. 高铁现状

(1)随着我国客运专线铁路建设高潮的不断深入,铁路建设越来越倾向于理性、合理、环保以及可持续的能源发展。国家 “十二五”规划中不断将高铁、客专向各类地质、地形延伸——隧道、曲线、高山等等,这也同时要求在高铁、客专建设过程中架桥机能满足不同地形的箱梁架设任务。为了避免资源浪费,在选择过程中,需要同时结合架桥机安全性能、使用性能、技术参数以及环保性能。

(2)新运公司现拥有的架桥机和国内其他兄弟单位使用的架桥机种类繁多,每种设备都有自身的优缺点,怎样根据不同地形条件选择不同的架桥机呢?……

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