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为了解决忠县长江大桥主梁施工工期紧的压力和便于施工的目的,通过对忠县长江大桥大型前支点牵索式挂篮高空整体提升方法进行研究,提出三种实施方案,而且分别对三种实施方案的工期、安全及经济进行定量分析及比较,最终选出最优方案,并制定对策表对此方案进行实施。经过现场实施验证表明,所选最优方案解决了主梁的施工工期目标和安全目标以及便于施工这一难题,并取得了一定的经济、社会效益,提高了施工技术水平,积累了施工经验,为今后承接此类工程提供有利的参考。
In order to solve the tight construction pressure of the main girder of Zhongxian Yangtze River Bridge and to facilitate the construction, three methods were put forward to study the overall lifting method of the overhead cradle, a large former fulcrum of Zhongxian Yangtze River Bridge, The duration, safety and economy of the implementation plan are quantitatively analyzed and compared, and the optimal plan is finally selected and the countermeasure table is formulated to implement the plan. After the field implementation verification shows that the selected optimal solution to solve the main girder construction schedule objectives and safety goals and ease of construction problems, and achieved a certain economic and social benefits, improve the level of construction technology, accumulated construction experience, In the future to undertake such projects provide a favorable reference.