【作者】 范金军；

【导师】 张哲；

【作者基本信息】 大连理工大学 ， 桥梁与隧道工程， 2003， 硕士

【摘要】 丹东月亮岛大桥为目前国内跨度最大的钢管混凝土提篮式系杆拱桥，施工工序复杂，施工技术难度较高。该桥施工中的稳定问题十分关键，而且，这种拱桥的拱轴线在施工过程中的调整非常有限，成桥后结构的线形和应力也不能再作调整。为了保证桥梁的安全施工，使成桥后结构内力和线形满足设计要求，施工控制就显得非常重要。 丹东月亮岛大桥的施工控制做了如下工作： 1．经过分析、计算和比较，确定了总体施工方案及主要施工程序。根据现有的施工条件，确定了拱肋的合龙方案，既经济可靠又缩短了工期。确定了先同时对称泵送两根下弦管混凝土，再对称泵送两根上弦管混凝土的泵送方案。确定了合理的横梁安装顺序和桥面混凝土浇筑顺序。这些施工方案对于该桥安全和高质量施工发挥了重要作用。 2．施工中稳定、应力和变形控制的实施。利用有限元软件ANSYS，对各种工况进行稳定性分析，确保每个施工阶段结构的稳定性满足要求。应力和变形控制中，以理论值为指导，采取各种监测手段，使结构的内力和线形控制在合理范围之内。 3．该桥为钢管混凝土系杆拱桥，拱脚产生的水平推力均由相应的系杆抵抗。在某个特定状态下，合理确定系杆张拉力的大小和张拉时间成为施工控制的关键，在该桥控制过程中起着非常重要的作用。更多还原

【Abstract】 Dandong Moon Ireland Bridge is a concrete-filled steel tubular arch bridge with the greatest span in China. The construction sequence of that bridge is very complex and the construction skill required is in much high level. During the process of construction, the stability of the bridge is the key of all the problems. Moreover, adjust of the arch axes of this kind of bridge is quite limited and no adjust for the structural figure and stress is available after construction. Therefore, the construction control is very important to guarantee construction safe and make internal force and figure meet design requirements.Dandong Moon Ireland Bridge’s construction control includes the following work:1. Make sure the total construction project and primary sequence by analysis, calculation and comparison. According to construction conditions, an economical and reliable closure project is formulated. The time limit for the project is greatly shortened. Make sure the pumping project that concrete should be symmetrically pumped into the two lower chord members before into the two upper chord members. Make sure the sequence of traverse beam is installed and deck concrete is cast. These construction projects play important roles in safe construction.2. Stability, stress and deformation control during construction are put in practice. To guarantee stability to meet requirements, stability is analyzed in detail. According to theoretic value, some measurements for stress and deformation are adopted to control internal force and figure in a reasonable range.3. The bridge is a concrete-filled steel tubular arch bridge with tied bar. The thrust of arch springing line during each phase is resist by corresponding tied bars. In a certain state, it is critical and important to make the correct value and reasonable time of pull of tied bars.更多还原