An non-destructive detecting method based on the shear wave propagation characteristics and its application on grouting quality of an immersed tube tunnel foundation base

作者：Zhang, Tengyu; Che, Ailan^*; Hui, Xiangyu; Feng, Shaokong

来源：Journal of Vibration and Shock, 2017, 36(20): 30-36.

DOI：10.13465/j.cnki.jvs.2017.20.006

• Correlation analysis
• Internal structure
• Low velocity layers
• Physical parameters
• Propagation characteristics
• Relative compactness
• Response energy
• Sand filling

Using a variety of detection means to reveal the internal structure of underground medium has always been an important issue in geotechnical engineering. A non-destructive detecting method based on the propagation characteristics of shear wave in three-dimensional layered media was presented. To verify the method, it was applied into a numerical three-dimensional stratified model and a series of dynamic responses were obtained when the physical parameters of interlayer were changed. With a series of waveform treatments including filter process, waveform energy normalization and waveforms mitigation based on correlation analysis, the relationship between shear wave response characteristics and relative compactness of interlayer was established. And its feasibility and accuracy for recovering the unknown parameters of low-velocity layer were certified. Based on the results of numerical cases, this method was used for the grouting quality detection in full-scaled model tests of an immersed tube tunnel. The relative compactness of interlayer under the tunnel floor was obtained using visual processing. As a result, the grouting quality was effectively evaluated.

• 出版日期2017
• 单位上海交通大学