Table 4 Comparison of the surrounding rock convergence between the two construction methods (all values in mm).
From: Study on stress variation of advance fiberglass anchor bolts during tunnel excavation process
Vault | Upper left side | Upper right side | Middle left side | Middle right side | Lower left side | Lower right side | |
|---|---|---|---|---|---|---|---|
DK80 + 432 | 666.2 | 394.1 | 290.8 | 364.1 | 307 | 126 | 116 |
DK80 + 440 | 947.9 | 452.3 | 268.8 | 195.1 | 206.6 | 24.2 | 31.9 |
Average deformation | 807.05 | 423.2 | 279.8 | 279.6 | 256.8 | 75.1 | 73.95 |
DK80 + 470 | 423.2 | 245.8 | 264.4 | 219.4 | 239 | 129.8 | 93.3 |
DK80 + 475 | 427.8 | 192.9 | 238.7 | 172.6 | 178.8 | 105.3 | 122.3 |
DK80 + 480 | 468 | 255.4 | 266.7 | 170.2 | 207 | 45.5 | 63.5 |
Average deformation | 439.7 | 231.4 | 256.6 | 187.4 | 208.3 | 93.5 | 93.0 |
Deformation reduction percentage | 45.52% | 45.33% | 8.29% | 32.98% | 18.90% | -24.55% | -25.81% |
