榫头型空心板梁的结构分析和工程应用

On Structure Analysis & Project Application of Tenon-shaped Hollow Beam

预应力混凝土空心板梁在城市及公路桥梁建设中应用极为广泛。由于桥梁设计新规范的推出,要求空心板梁梁底面与支座顶面平整密贴、传力均匀。针对这一情况,分析了空心板梁受力情况及施工难度,提出了榫头型空心板梁的方案。通过结构分析和在上海A15南进场路段工程应用,实践证明,榫头型空心板梁具有推广利用的前景。

Prestressed concrete hollow beam has been applied widely in city and highway bridge construction. With the requirements from the latest bridge design standard,the bottom of hollow beam should be jointed with the bearing top tightly and smoothly and should pass the force evenly. Aiming the situation,the paper introduces the stressing condition and construction difficulty of hollow beam,then,the plan of tenon-shaped one is put forward. Through the structure analysis and the application of Shanghai A15 South Approach Section Project,tenon-shaped hollow beam is proved to have a developing future.