基于复合主拱圈加固拱桥技术中锚固系统最佳参数组合探讨

Discussion on Optimal Parameters Combination of Arching System Based on Composite Main Arch Circle Method

利用复合主拱圈加固技术加固拱桥成败的关键是新增混凝土结构层和原主拱圈结构层能否共同作用,作为新老结构层共同作用的保障机制—锚杆锚固系统,其最大锚固力则是研究重点。选取影响锚杆锚固力的5个主要因素(钢筋直径、锚固长度、钻孔孔径、钢筋强度等级及锚固剂)进行锚杆的拉拔试验,提出了适合该加固技术的锚固系统最佳参数组合。对桥梁加固及其他类似工程具有一定的借鉴意义。

Whether the new concrete structure layer and the old structure of main arch circle structure to act as a whole is the key of reinforcement technology to reinforce the arch bridge. The anchor system,as the common guarantee mechanism for the old and new structure layers,its maximum anchoring force is studied. Factors such as bolt diameter,anchoring depth,hole diameter,intensity grade of steel and binding material are considered during the pull-out test of anchors,then the optimal parameter combination of arch...