套筒灌浆饱满性的超声检测

Ultrasonic testing of sleeve grouting fullness

为了快速判断套筒灌浆是否饱满,基于超声波的传播原理和反射特性,结合灌浆不饱满的出浆口特征,分析了灌浆饱满性的超声检测方法。设计制作了3组试件,考虑在灌浆不饱满、出浆孔道倾斜及破损面倾斜等工况下进行试验,结果表明,该方法可快速有效地确定内部是否饱满,通过盲区以外的首波信号可确定不饱满处灌浆料破损面的位置,与实际位置的误差平均值不大于5%。工程验证结果表明,出浆口超声检测法具有检测效率高、成本低廉的优点,可与其他饱满度的定量检测方法配合使用。

In order to quickly determine whether the sleeve grouting is full or not,an ultrasonic method is developed to detect the grouting fullness,based on the propagation principle and reflection property of ultrasounds in combination with the characteristics of the grout outlet which is not full.Three groups of test pieces were designed and manufactured.The experimental study was carried out under the conditions of insufficient grouting,inclined outlet duct and inclined damaged surface.The results show that this method can quickly and effectively judge whether the sleeve is full or not,and can determine the location of damaged surface of grouting material inside the insufficient sleeve,with an average error to the actual one of no more than 5%,if the echo arrives behind the blind area.The results of engineering verification show that the ultrasonic method along the grouting outlet has the advantages of high testing efficiency and low cost,and it can be used with other quantitative testing methods of plumpness.