柔性吊杆拱桥吊杆锚头病害特征及检测指标

Fault Features and Detection Index of Boom Anchor Head for Flexible Boom Arch Bridge

现针对柔性吊杆拱桥吊杆锚头的退化行为,系统地总结了柔性吊杆锚头的安全性和耐久性病害特征。指出钢丝墩头锈蚀、内外螺纹锈蚀、锚头开裂和变形是墩头锚、冷铸墩头锚的主要退化风险;钢绞线滑移或回缩、夹片破损或缺失是夹片锚的主要安全风险。同时,针对现行规范中关于柔性吊杆锚头检测指标方面的不足,在归纳梳理影响柔性吊杆锚头安全与耐久性能检测指标的基础上,建立了柔性吊杆锚头的检测指标体系。

Aiming at the degenerating action of boom anchor head for flexible boom arch bridge, the article systematically summarizes the safety of flexible boom anchor head and its durability fault feature. The article points out the steel wire pier head rustiness, internal and external thread rustiness, anchor head cracking and deformation are the main degenerating risks of pier head anchor and cold cast pier head anchor. The slippage or retraction of steel strand, and the damage or loss of damping piece are the main safety risks of dampingpiece anchor. Also aiming at the shortage of the flexible boom anchor head detection index in the current standards, and on the basis of summarizing the influence on the safety of flexible boom anchor head and the detection index of durability performance, the detection index system of flexible boom anchor head is established.