Research Article
Ground Settlement of High-Permeability Sand Layer Induced by Shield Tunneling: A Case Study under the Guidance of DBN
Table 4
Summary of influencing factors and corresponding settlement values.
| | Influence factors | Level of each factor () | | 1 | 2 | 3 | 4 |
| | Soil pressure | Pressure (bar) | 1.5 | 2.0 | 2.5 | 3.0 | | Settlement (mm) | 2.15 | 1.75 | 1.38 | 1.22 | | Jack thrust | Thrust (kN) | | | | | | Settlement (mm) | 7.81 | 11.54 | 13.01 | 14.12 | | Cutter head torque | Torque (kN·m) | | | | | | Settlement (mm) | -1.51 | -3.68 | -5.95 | -6.47 | | Tunneling speed | Speed (mm/min) | 25 | 30 | 35 | 45 | | Settlement (mm) | -1.80 | -3.01 | -3.93 | -4.65 | | Grouting volume | Volume (m3) | 3 | 4 | 5 | 6 | | Settlement (mm) | -5.34 | -5.11 | -4.35 | -2.57 | | Grouting pressure | Pressure (bar) | 2.0 | 2.5 | 3.0 | 3.5 | | Settlement (mm) | -2.18 | -2.07 | -1.95 | -1.79 | | Permeability coefficient | Coefficient (cm/s) | 1e-4 | 1e-3 | 0.01 | 0.1 | | Settlement (mm) | 3.68 | 6.23 | 11.24 | 16.37 | | Slurry density | Density (g/cm3) | 1.2 | 1.4 | 1.6 | 1.8 | | Settlement (mm) | 13.65 | 11.64 | 9.63 | 6.23 |
|
|
