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中缅管道悬索跨越工程多建在山谷、河流上,两岸施工条件复杂,通常不具备对称安装条件。针对该问题提出非对称方法进行悬索跨越桥身安装。利用仿真计算分析非对称施工时跨越结构的受力状况,结合施工缆索等措施,优化吊装工序及预偏措施,完成桥身安装。通过中缅管道悬索跨越工程的实践,实现了从跨越一岸向另一岸进行桥身的安装,桥身安装过程中结构受力合理,成桥线形符合设计要求。通过此技术的实施,证明非对称安装技术能够满足特殊地形下桥身安装施工需要,顺利解决了对称法桥身施工对施工场地要求较高的问题,能够取得良好的经济效益与社会效益。
China-Myanmar Pipeline Suspension Project is mostly built in valleys and rivers, and the construction conditions on both sides of the Strait are complex, and usually do not have symmetrical installation conditions. In order to solve this problem, an unsymmetrical method is proposed to mount the suspension bridge across the bridge. The simulation calculation is used to analyze the stress situation of the cross-structure during asymmetrical construction, and the measures such as the construction cable are used to optimize the hoisting process and pre-bias measures to complete the bridge body installation. Through the practice of the bridge overhang project in China and Burma, the installation of the bridge body from one bank to the other bank has been realized. The structure of the bridge body is reasonable and the alignment of the bridge meets the design requirements. Through the implementation of this technology, it proves that the asymmetric installation technology can meet the needs of the bridge construction under special terrains, and successfully solves the problems that the bridge construction with symmetry requires high construction site and can achieve good economic and social benefits.