Tunnels or galleries, with or without linings; Methods or apparatus for making thereof (E02D29/045, E02D29/063 take precedence; linings per se E21D11/00); Layout of tunnels or galleries

Child Classifications

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• E21D 9/001
• E21D 9/003
• E21D 9/005
• E21D 9/006
• E21D 9/008
• E21D 9/01 Methods or apparatus for enlarging or restoring the cross-section of tunnels, e.g. by restoring the floor to its original level
• E21D 9/02 Driving inclined tunnels or galleries
• E21D 9/03
• E21D 9/04 Driving tunnels or galleries through loose materials; Apparatus therefor not otherwise provided for
• E21D 9/06 Making by using a driving shield
• E21D 9/10 Making by using boring or cutting machines (E21D9/08 takes precedence; mining picks E21C35/18)
• E21D 9/12 Devices for removing or hauling away excavated material or spoil; Working or loading platforms (underground transport E21F13/00)
• E21D 9/14 Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings