Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling (E 21 D 15/00 to E 21 D 23/00 take precedence; specially for shafts E 21 D 5/00; lining pressure water galleries, linings therefor E 02 B 9/06) [2]
with concrete cast in situ; Shuttering or other equipment adapted therefor
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12
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Temporary supports for use during building; Accessories
11
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14
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Lining predominantly with metal [2]
11
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15
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Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members (insulation E 21 D 11/38) [2]
11
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18
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Arch members
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20
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Special cross-sections, e.g. corrugated
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22
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Clamps or other yieldable means for interconnecting adjacent arch members either rigidly, or allowing arch member parts to slide when subjected to excessive pressure
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24
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Knuckle joints or links between arch members
11
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26
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Shoes for connecting arch members to longitudinal struts
11
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28
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Longitudinal struts
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30
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Bases for lower arch members (for props E 21 D 15/54)
11
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34
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Joints between vertical props and horizontal top bars (end caps forming part of the props E 21 D 15/54)
11
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36
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Linings or supports specially shaped for tunnels or galleries of irregular cross-section [2,3]
11
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38
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Waterproofing (in general E 02 D 31/00); Heat insulating; Soundproofing; Electric insulating (for building constructions in general E 04 B 1/62) [2]
11
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40
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Devices or apparatus specially adapted for handling or placing units of linings for tunnels or galleries [2]
13
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00
Large underground chambers; Methods or apparatus for making them (lining E 21 D 11/00) [6]
with wooden prop parts joined by double conical connectors
15
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06
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with parts joined by a lock, with or without slight axial adjustability
15
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08
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with toggle joint connection
15
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10
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with dog-clutch or pin-and-hole connection
15
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12
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with locking devices located near head or foot
15
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14
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Telescopic props (general means for fixing telescopic parts together
F 16 B)
15
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15
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Means counteracting entry of dirt; Built-in cleaning devices
15
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16
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with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
15
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18
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with one part resting on a supporting medium, e.g. rubber, sand, bitumen, lead, located in the other part, with or without expulsion or displacement of the medium upon excessive pressure
15
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20
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with pawl, pin, cross-piece, or the like engaging with ratchet teeth, notches, holes, or the like spaced apart at intervals
15
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22
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with member, pin, cross-piece, or the like ruptured, sheared through, or permanently deformed upon excessive pressure
15
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24
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with axial screw-and-nut, rack-and-worm, or like mechanism
15
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26
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with screw, worm, or the like not self-locking but normally prevented from rotation by friction members which slip upon excessive pressure
15
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28
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with parts held relatively to each other by friction or gripping, e.g. using wedges
15
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30
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by means expanded or contracted by pressure applied through the medium of a fluid or quasi-fluid, e.g. rubber
15
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32
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by a deformable collar
15
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34
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by axially-moving balls, rollers, or the like
15
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36
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by a tiltable collar surrounding one or both parts
15
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38
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with longitudinally-divided upper or lower prop parts, e.g. interfitting laminations
15
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40
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Collar or other support gripped to one or both parts by toggle-action, cam, or other member pivoted or similarly mounted
15
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42
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with special parts to influence the friction
15
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43
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Details of wedges (friction linings or pads E 21 D 15/42)
15
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44
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Hydraulic, pneumatic, or hydraulic-pneumatic props
15
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45
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having closed fluid system, e.g. with built-in pumps or accumulators
