Distribution Features of the Minimum Rock Cover Thickness of the Surrounding Rock Self-Stability of the Metro Tunnel in the Soil-Rock Dualistic Stratum
Table 5
Qingdao metro station tunnel in excavation.
S/N
Station name
Excavation technique
D (m) × h (m)
H (m)
1
Qingdao Railway Station
Open-cut + CRD
23.45 × 14.58
2.3 ∼ 8.5
2
Zhongshan Park
Arch cover method
19.20 × 16.20
10.0 ∼ 12.0
3
Zhanshan
Arch cover + CRD
20.52 × 18.18
13.0 ∼ 15.1
4
Jiangxi Rd
Arch cover + CRD
20.60 × 15.50
8.9 ∼ 10.5
5
Dunhua Rd
Bench method
10.38 × 9.50
14.6 ∼ 20.0
6
Qingjiang Rd
Arch cover + CRD
20.36 × 17.35
6.3 ∼ 8.3
7
Wannianquan Rd
Arch cover + CRD
20.66 × 18.16
5.1 ∼ 10.1
8
Junfeng Rd
Arch cover + CRD
20.79 × 18.37
7.4 ∼ 15.6
9
Yan’anlu Rd
Arch cover method
23.76 × 19.13
13.4 ∼ 16.4
10
Zhiquan Rd
Arch cover method
23.76 × 19.13
13.2 ∼ 17.0
11
Haichuan Rd
Step + CD
22.66 × 16.80
13.3 ∼ 19.0
12
Xujia Maidao
Step + CD
22.10 × 16.80
13.3 ∼ 18.0
13
Tong’an Rd
Arch cover method
19.80 × 16.50
8.96 ∼ 10.3
14
East Bus Station
Arch cover method
22.96 × 16.99
10.8 ∼ 11.75
15
Zaoshan Rd
Arch cover method
19.80 × 16.50
10.17 ∼ 16.22
16
Licun Park
Arch cover + CRD
24.40 × 16.80
10.0 ∼ 13.0
Note
CRD means cross diagram method, and CD means center diagram method
