Tunnels as civil engineering structures are an underground passageway, dug through the surrounding soil,earth,rock enclosed except for entrance and exit,a tunnel may be for foot or vehicular road traffic, for rail traffic, or for a canal. The central portions of a rapid transit network are usually in the tunnel. Some tunnels are aqueducts to supply water for consumption or for hydroelectric stations or are sewers. Utility tunnels are used for routing steam, chilled water, electrical power or telecommunication cables, as well as connecting buildings for convenient passage of people and equipment. UMC tunneling support system includes top support, face support, partial support, temporary support and long-term support,ensures the safety and stability of tunnel engineering.

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