Table 1 Descriptive statistics of parameters.
Parameter | Unit | Count | Mean | Std | Min | 25% | 50% | 75% | Max |
|---|---|---|---|---|---|---|---|---|---|
Hole sequence | - | 778 | 2.26 | 0.81 | 1.00 | 2.00 | 2.00 | 3.00 | 3.00 |
Hole depth | m | 778 | 25.29 | 15.32 | 2.41 | 10.41 | 25.41 | 38.90 | 55.41 |
Section length | m | 778 | 4.56 | 0.98 | 2.00 | 5.00 | 5.00 | 5.00 | 5.00 |
Hole diameter | mm | 778 | 58.16 | 6.21 | 56.00 | 56.00 | 56.00 | 56.00 | 76.00 |
Pre-grouting permeability | Lu | 778 | 3.05 | 10.57 | 0.00 | 0.10 | 0.58 | 2.92 | 106.58 |
Initial water-cement ratio | - | 778 | 4.96 | 0.31 | 1.00 | 5.00 | 5.00 | 5.00 | 5.00 |
Grouting pressure | MPa | 778 | 4.02 | 0.94 | 1.50 | 3.50 | 4.50 | 4.97 | 5.09 |
Grouting volume | L | 778 | 275.69 | 687.11 | 0.00 | 60.12 | 137.80 | 536.00 | 5155.60 |
