Abstract: 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.