Compressed Air Work And Diving 1909
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KING EDWARD VII. BRIDGE.
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wide. The working chamber was 8 ft. high all over
at the sides, rising, except at the cutwaters, by a curve
in the roof to 9 ft. 6 in. high at the centre. Above the
ceiling were girders, 3 ft. 6 in. cleep in the micklle and
3 ft. centres. The triangular shapecl portion above the
CLitting edge, called the shoe, was stiffenecl every 3 ft.
by cliaphragms. This portion terminated about 7 in.
from the cuttin£ eclg'e in a similar manner to the
o o
Fig. 10.—King Edward VII. Bridge Caissons.
Redheugh cylinders, and the ledge so formed actecl as
a brake in soft ground, and also helped to keep the
caisson plumb. The same purpose was effectecl by two
o-irclers with a bottom flange 3 ft. wide, which clivided
the working chamber into three bays. I he first 26 ft.
6 in. of caisson was strongly bracecl and strutted by Steel
frames, and was so constructecl that it woulcl bear its
own weiirht and that of a certain amount of concrete