Study on the Mechanical Response of a Dense Pipeline Adjacent to the Shallow Tunnel
Table 4
Simulated working conditions.
Working condition
Design conditions
Notes
1
Clear distance between dense pipeline and dug tunnel
0.05D
Pipeline spacing refers to the actual project, D is the tunnel span, the intersection angle is 90°, the surrounding rock is type 1, and the construction method is CRD
2
0.1D
3
0.15D
4
0.2D
5
Intersection angle of dense pipeline and excavated tunnel
0°
Pipeline spacing refers to the actual project, the net distance is the actual value, the surrounding rock is type 1, and the construction method is CRD
6
30°
7
60°
8
90°
9
Surrounding rock parameter
Type 1
Pipeline spacing refers to the actual project, the net distance is the actual value, the intersection angle is 90°, and the construction method is CRD
10
Type 2
11
Type 3
12
Construction method
Full face excavation method
Pipeline spacing refers to the actual project, the net distance is the actual value, the intersection angle is 90°, and the surrounding rock is type 1
