Research Article
Mechanism Analysis of the Influence of Freeze-Thaw on the Damage and Debonding Evolution of Sandstone-Concrete Interface
Table 1
SE-SPI hierarchical sequence parameters.
| | Seq Name | Sf (MHz) | o1 (Hz) | P1 (μs) | P2 (μs) | PRG | SW (KHz) | NS | RFD (ms) | RG1 (db) | DRG1 | TW (ms) | TE (ms) | NECH | RFA1 (%) | NTI | DL1 (ms) | DL4 (ms) | DL5 (ms) | DL6 (ms) | DL9 (ms) | DR | TD | GM |
| | SE-SPI | 12 | 475258 | 16 | 33.04 | 3 | 200 | 16 | 0.08 | 18 | 3 | 500 | 0.2 | 3500 | 80 | 33 | 0.08688 | 0.4 | 0.8 | 0.2 | 0.1 | 1 | 200000 | 1 |
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