Research Article
An Improved Predictive Model for Determining the Permeability Coefficient of Artificial Clayey Soil Based on Double T2 Cut-Offs
Table 2
Parameters of the NMR tests.
| | Parameter | Value | Unit |
| | Magnetic induction intensity | 0.55 | T | | Frequency | 13 | MHz | | Coil diameter | 60 | mm | | Ambient temperature | 30 | °C | | 90° pulse width | 20 | μs | | 180° pulse width | 30.48 | μs | | Sampling points | 208018 | — | | Sampling frequency | 200 | kHz | | Frequency delay | 8 | μs | | Latency time of repeated sampling | 8000 | ms | | Analog gain | 20 | — | | Digital gain | 3 | — | | Accumulated sampling number | 4 | — | | Echo time | 260 | μs | | Echo number | 4000 | — |
|
|
