不对称独塔斜拉桥塔梁同步施工的可行性研究

发布时间：2018-06-18 02:22

本文选题：独塔斜拉桥 + 同步施工　；参考：《公路工程》2014年01期

【摘要】：斜拉桥建设中往往采用先建塔、后做梁的施工顺序,若采用塔梁同步施工方法,可以有效缩短工期同时减少工程预算,为了研究该方法在不对称独塔斜拉桥中使用的可行性,依托实际工程,利用有限元软件,计算得到采用塔梁同步法施工的结构内力、应力、线形等结果,并与采用先塔后梁施工方法的结果对比分析。结果表明,采用塔梁同步施工,对箱梁的内力、线形与支座反力影响很小,但会小幅增加主塔所受弯矩与截面应力和塔横梁的成桥应力与施工过程控制应力。总体上塔梁同步施工方法优于传统的先塔后梁施工方法,即以牺牲主塔5%左右的应力储备,大幅缩短施工工期,同时减少可观的工程预算。
[Abstract]:In the construction of cable-stayed bridge, the construction sequence of tower and beam is often adopted. If the construction method of tower beam is used, the construction period can be shortened and the project budget can be reduced. In order to study the feasibility of using this method in asymmetric single-tower cable-stayed bridge, Based on the actual engineering and using the finite element software, the results of internal force, stress, linear shape of the structure constructed by the tower and beam synchronous method are calculated, and compared with the results of the construction method of the first tower and the second beam. The results show that the simultaneous construction of tower beam has little influence on the internal force, linear and support reaction force of box girder, but it will increase slightly the moment and section stress of the main tower, the bridge stress of the tower beam and the control stress of the construction process. On the whole, the synchronous construction method of tower beam is better than the traditional construction method of first tower and rear beam, that is, sacrificing about 5% of the stress reserve of the main tower, greatly shortening the construction period and reducing the considerable project budget at the same time.
【作者单位】：武汉理工大学工程力学系;
【分类号】：U448.27

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