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Rock bolts anchor slab against uplift
Rock bolts used in mine and tunnel work to anchor overhead rock, are used to tie basement slab against up-lift of Pennsylvania project at Harrisburg; anchors permit use of 12-in. thick floor slab; alternative would have been extra 4-to 6-ft of concrete in slab to counteract uplift force of water table 8-ft above basement floor; as last step of procedure, hydraulic jack tensioned bars to about 44, 000-lb and nuts were given final tightening; threaded ends were cut off and insert areas were filled in with concrete.
Rock bolts anchor slab against uplift
Rock bolts used in mine and tunnel work to anchor overhead rock, are used to tie basement slab against up-lift of Pennsylvania project at Harrisburg; anchors permit use of 12-in. thick floor slab; alternative would have been extra 4-to 6-ft of concrete in slab to counteract uplift force of water table 8-ft above basement floor; as last step of procedure, hydraulic jack tensioned bars to about 44, 000-lb and nuts were given final tightening; threaded ends were cut off and insert areas were filled in with concrete.
Rock bolts anchor slab against uplift
Eng News-Rec
Engineering News-Record ; 176
1966
Article (Journal)
English
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