大悬臂倒T盖梁设计方案及经济性分析

Design and Economic Analysis of Big Cantilever T Cover Beam

在城市的桥梁工程建设中,为合理降低桥梁建设高度,又保证桥下车辆、行人的通行条件和空间,并减少设计施工难度,节约工程投资,需选择合适的梁型。此文以宜宾市某桥梁工程为例,阐述采用大悬臂倒T预应力混凝土盖梁的结构设计技术及受力分析。并通过建立仿真模型,计算分析在施工阶段和使用阶段倒T盖梁的正应力分布。通过验算设计指标符合规范要求。在此基础上,又与普通盖梁进行了经济性比较,结果显示,采用倒T盖梁比较经济。

During the construction of urban bridges, to reasonably reduce the height of bridge construction, ensure that the vehicles and pedestrians prevailing conditions and space under the bridge, reduce the design and construction difficulty, and save construction investment, it need to choose the appropriate type beam. Taking a bridge engineering in Yibin city as an example in this article, the paper talks the big cantilever T prestressed concrete technology of capping beam structure design and stress analysis. Through the establishment of simulation model, the inverted T normal stress distribution is calculated and analyzed in con- struction stage and using stage. The design index comply with the requirements of specification. On this basis, the economical comparison is performed with ordinary cover beams, and the results show that inverted T capping beam is more economical.