桥梁预应力孔道压浆密实度的无损检测方法

Nondestructive Testing Methods on Grouting Density of Pre-stressed Bridge Pore

桥梁预应力孔道压浆不饱满引起的钢绞线锈蚀,将缩短桥梁的使用寿命。采用初检和复检相结合,通过弹性波穿透法、超声波对测法和扫描式冲击回波法等无损检测手段,评定预应力孔道压浆质量,定位缺陷并采取相关补救措施。从检测结果分析来看,依靠无损检测,初检和复检相结合的检测方法是便捷、准确、可行的。

The non fullness of the grouting of prestressed bridge pore allows rapid loss of the prestresses, shortening life of the bridge. Initial inspection and re-examination using the method of combining through-elastic wave penetrate method, ultrasonic test and scanning shock echo method to test the grouting density of prestressed duct, assess duct grouting quality and locate defects, and further take related remedial measures. All these measures lead to control the grouting quality and ensure the pre-stressing effect. The test results and analysis proved that the relying on the combination of nondestructive testing technology and initial inspection and rechecking method is convenient, accurate and feasible.