An Investigation of Effects and Safety of Pipelines due to Twin Tunneling
Table 4
Summary of the calculation parameters of the four centrifuge model tests.
Test identity
Smax (mm)
i (m)
α
κpmax/
Ku (MPa)
Kd (MPa)
[EPIP/(((n/2α)0.5i)4)][Smax/(n/2α)0.5i]0.25
Spmax/
Test 1 (single tunnel)
35.0
7.94
0.667
0.253
8.22
80.21
0.135
0.669
Test 1 (twin tunnels)
52.9
9.02
0.524
0.265
8.08
73.84
0.081
0.832
Test 2 (single tunnel)
50.3
6.01
0.690
0.131
8.22
80.21
0.500
0.695
Test 2 (twin tunnels)
89.4
8.26
0.675
0.161
8.22
80.21
0.148
0.674
Test 3 (twin tunnels)
67.3
7.65
0.519
0.242
8.22
80.21
0.087
0.773
Test 4 (twin tunnels)
70.3
7.43
0.426
0.176
8.22
80.21
0.183
0.691
Note. Test 1 (single tunnel) means that the first tunneling has been finished in the first centrifuge model test; Test 1 (twin tunnels) means that the twin tunneling has been completed in the first centrifuge model test. This interpretive mode also applies to the other test identities.
