An Investigation of Effects and Safety of Pipelines due to Twin Tunneling

<div>Illustration of pipeline safety criteria due to tunneling: (a) <i>ε</i><sub>pallowable</sub> = 800 <i>με</i>; (b) <i>ε</i><sub>pallowable</sub> = 400 <i>με</i>.</div>

Advances in Civil Engineering

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Figure 11

Figure 11: An Investigation of Effects and Safety of Pipelines due to Twin Tunneling 