Based on the ultrasonic principle,the working principle of ground penetrating radar(GPR)and high density surface wave(HDW)are analyzed.Combined with the field test,the NDT is carried out before and after treatment of subgrade settlement disease.It is found that GPR and HDW have good detection effect on subgrade settlement disease.The application scope of two NDT methods is proposed.Ground penetrating radar is suitable for field detection of important traffic sections with grouting depth less than 5.00 m.High density surface wave is suitable for the detection of large area with grouting depth of more than 5.00 m,and the detection area needs to be investigated for the distribution of structures.
关键词
无损检测/超声波/探地雷达/高密度面波/沉降病害
Key words
NDT/ultrasonic/ground penetrating radar/high density surface wave/settlement disease
维普
万方数据