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Advances in Civil Engineering
/
2020
/
Article
/
Tab 1
/
Research Article
Optimization Analysis of Smart Steel-Plastic Geogrid Support for Tunnel
Table 1
Parameters of surrounding rocks and lining materials.
d
(m)
(kN m
−3
)
E
(GPa)
(°)
C
(MPa)
Surrounding rocks
50
22
1
0.34
37
0.2
Shotcrete
0.2
22
30
0.25