某大桥中横梁后续补张拉处置技术方案研究

The Additional Tensioning Disposal Method Feasibility Researth of the Middle Transverse Beamon Long-yong Expressway

预应力结构施工建设中,有时会出现预应力钢绞线切断失去继续张拉条件后,发现锚下有效预应力不足的情况,采取何种方案进行补张拉值得研究。结合工程实例,通过建立计算模型对完整锚板和含连接面锚板进行受力性能分析,通过对比分析得出:所采取的后续补张拉处置方法是可行的,并给出中横梁区域的补强设计,可为其他工程同类问题提供借鉴。

Combining with the engineering example,though the establishment of calculation model of complete and contained junction surface of anchor plate to analysis behavior,through contrastive analysis draw conclusions： the method is feasible,provide the reinforcement design of middle transverse beam area,which would be a practical and useful reference for engineers in similar projects.