7 Shapes of Tunnels – Advantages & Disadvantages
Shapes of Tunnels Commonly used tunnel shapes(Shapes of Tunnels) are discussed below: 1. Polycentric Shaped of Tunnels This sort of tunnel shape has a number of centers and provides a sufficient flat base for traffic movement. Advantages: Disadvantages: 2. Circular Shaped Tunnels Circular tunnels are used to carry water under pressure. These are not appropriate…
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