Research Article
Numerical Analysis on the Behavior of Existing Tunnels Subjected to the Undercrossed Shield Tunneling at a Small Proximity
Table 2
Parameters of the linings.
| Type | Segment width | External diameter | Internal diameter | Elastic modulus | l (m) | D (m) | d (m) | E (m) |
| Existing tunnel | 3 | 6 | 5.4 | 34.5 × 103 | New metro line | 1.2 | 6.4 | 5.8 | 34.5 × 103 |
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