Question

Classification of tunnels according to purpose, conveyance, material, position or alignment, shape and size of tunnels under different conditions

Answer 1

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✔ There are three basic types of tunnel construction in common use.

⚛ Cut-and-cover tunnels are constructed in a shallow trench and then covered over.

⚛ Bored tunnels are constructed in situ, without removing the ground above.

⚛ Finally a tube can be sunk into a body of water, which is called an immersed tunnel.

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