Research Article
Layered Grouting Technology Based on a Comprehensive Water-to-Cement Ratio for the Overlying Loess Stratum of Urban Shallow Tunnels
Table 7
Grouting parameters based on the comprehensive water-to-cement ratio.
| | Loess stratum | Diffusion radius (m) | Grouting height (m) | Maximum pressure (MPa) | Slurry water-to-cement ratio | Single hole grouting amount | Grouting method |
| | Grouting pad (2-3 m) | 1.5 | 1 | 1.5 | 0.8 | 3.74 | Low pressure slow infiltration | | Reinforcement layer (3–7 m) | 1.5 | 4 | 2.5 | 1.1 | 14.9 | Intermittent type |
|
|
