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A platform for research: civil engineering, architecture and urbanism
Anchor bolts prevent rock falls in tunnels on reading
Special bolts designed for anchoring rock surfaces applied in two tunnels, one 1932 ft and other 3409 ft in length; bolts are made in various sizes from 5/8 to 1 in. in diam, and are 2 ft to 7 ft long; expansion shell type is preferred for roof work because it requires less exactness in depth to which holes are drilled; data on technique and equipment used.
Anchor bolts prevent rock falls in tunnels on reading
Special bolts designed for anchoring rock surfaces applied in two tunnels, one 1932 ft and other 3409 ft in length; bolts are made in various sizes from 5/8 to 1 in. in diam, and are 2 ft to 7 ft long; expansion shell type is preferred for roof work because it requires less exactness in depth to which holes are drilled; data on technique and equipment used.
Anchor bolts prevent rock falls in tunnels on reading
Ry Track Structures
1958
3 pages
Article (Journal)
English
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Rock bolts anchor slab against uplift
Engineering Index Backfile | 1966
| Engineering Index Backfile | 1919
| NTIS | 1978