. The Encyclopaedia Britannica; ... A dictionary of arts, sciences and general literature. hly prepared. This metliod is nowabandoned. It was peculiarly liable to danger from thrscour of the stream. .^.The name caisson is also sometimes ;i26 B 11 1 D G E S LsuBsrEucTOE.:: applied to a meie frame with wooden walk which s floatedto the site of the pier, and there sunk so as to form anenclosure, inside which concrete can bo shot and can setundisturbed by the wash of the water. Concrete in a shell is a name which might be applied toall the methods of founding a pier which depend on thevery valuabl
. The Encyclopaedia Britannica; ... A dictionary of arts, sciences and general literature. hly prepared. This metliod is nowabandoned. It was peculiarly liable to danger from thrscour of the stream. .^.The name caisson is also sometimes ;i26 B 11 1 D G E S LsuBsrEucTOE.:: applied to a meie frame with wooden walk which s floatedto the site of the pier, and there sunk so as to form anenclosure, inside which concrete can bo shot and can setundisturbed by the wash of the water. Concrete in a shell is a name which might be applied toall the methods of founding a pier which depend on thevery valuable property whcb strong hydraulic concretepossesses of setting into a iold mass under water. Therequired space is enclosed by a wooden or iron shell; thesoil inside the shell is removed by dredging, or some formof mechanical excavator, until the formation is reachedwhich is to support the pier; the concrete is then shotinto the enclosed sjiaco from a height of about 10 feet, andrammed down in layers about 1 foot thick; it soon con-solidates into a. permanent artificial stone. The shell,. Fig. 94 unless of small size or very strong form, requires to bebraced to meet the outward pressure of the concrete. The
Size: 2037px × 1227px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectencyclo, bookyear1902
