Fig. 1. Integrated PVDF transducer system
Fig. 2. Experiment Process
Fig. 3. Drainage maintenance system
Fig. 4. Contaminated sediments reduction tests (a) 1.5kHz sin signal mode (b) 1.5kHz sweep signal mode (c) 3kHz sin signal mode (d) 3kHz sweep signal mode (e) 4kHz sin signal mode (f) 4kHz sweep signal mode
Fig. 5. Measurement of tunnel acoustic pressure (a) Longitudinal drainage (b) Transverse drainage
Fig. 6. Acoustic pressure measurement test result of longitudinal drainage in laboratory
Fig. 7. Acoustic pressure measurement test result of transverse drainage in laboratory
Fig. 8. Acoustic pressure measurement test result of longitudinal drainage on site
Fig. 9. Acoustic pressure measurement test result of transverse drainage on site
Table 1. Components analysis of contaminated sediment components (Unit %) [9]
Table 2. Simulation contaminated sediment in laboratory
Table 3. Contaminated sediments reduction efficiency result
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