Research Article
Study on the Seismic Response and Aseismic Measure of Fault-Crossing Tunnels under Combined Action of Fault Dislocation and Seismic Motions
Table 3
Principal stress of tunnels with different aseismic measure.
| | Fault width | Case | Aseismic measure | Maximum principal stress (MPa) | Minimum principal stress (MPa) |
| | 10 m fault | Synthetic wave | None | 111.1 | 70.1 | | Flexible joint | 76.9 (−30.8%) | 65.5 (−6.6%) | | Grouting | 69.8 (−37.2%) | 48.8 (−30.4%) | | Flexible joint + grouting | 48.0 (−56.8%) | 42.6 (−39.2%) | | Wenchuan wave | None | 107.8 | 94.0 | | Flexible joint | 122.2 (+13.3%) | 103.2 (+9.8%) | | Grouting | 67.3 (−37.6%) | 67.3 (−28.4%) | | Flexible joint + grouting | 86.9 (−19.4%) | 73.1 (−22.2%) | | Kobe wave | None | 106.8 | 88.3 | | Flexible joint | 121.1 (+13.4%) | 102.4 (+15.9%) | | Grouting | 66.4 (−37.8%) | 66.4 (−24.8%) | | Flexible joint + grouting | 86.3 (−19.2%) | 72.2 (−18.2%) |
| | 100 m fault | Synthetic wave | None | 46.5 | 42.7 | | Flexible joint | 56.6 (+21.7%) | 54.6 (+27.9%) | | Grouting | 35.2 (−24.3%) | 25.8 (−39.6%) | | Flexible joint + grouting | 42.3 (−9.0%) | 31.9 (−25.3%) | | Wenchuan wave | None | 32.8 | 40.0 | | Flexible joint | 51.3 (+56.4%) | 55.4 (+38.5%) | | Grouting | 26.1 (−20.4%) | 28.4 (−29.0%) | | Flexible joint + grouting | 32.7 (−1%) | 49.9 (+24.7%) | | Kobe wave | None | 33.1 | 28.9 | | Flexible joint | 43.1 (+30.2%) | 35.6 (+23.2%) | | Grouting | 23.3 (−29.6%) | 25.2 (−12.8%) | | Flexible joint + grouting | 28.0 (−15.4%) | 20.9 (−27.7%) |
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