The encyclopædia britannica; a dictionary of arts, sciences, literature and general information . (From Ensineering Nan, New York.) Fig. 4.—Perspective showing manner of enclosing spare betweentunnel caissons for the Metropolitain under the Seine at (From Ensimering News. New York.) Fig. 5.—Transverse Section. Coffer-dam superimposed over joints between caissons in tunnels for the MetropoHuirunder the Seine at Paris. of 132 ft., under the smaller arm of the Seine. The cost ofthe tunnel was 7000 francs per lineal metre. William Sooy Smith published in Chicago, in 1877, a de-scription of
The encyclopædia britannica; a dictionary of arts, sciences, literature and general information . (From Ensineering Nan, New York.) Fig. 4.—Perspective showing manner of enclosing spare betweentunnel caissons for the Metropolitain under the Seine at (From Ensimering News. New York.) Fig. 5.—Transverse Section. Coffer-dam superimposed over joints between caissons in tunnels for the MetropoHuirunder the Seine at Paris. of 132 ft., under the smaller arm of the Seine. The cost ofthe tunnel was 7000 francs per lineal metre. William Sooy Smith published in Chicago, in 1877, a de-scription of a scheme for building a tunnel under the Detroitriver by sinking caissons end to end, each caisson to be securedto the adjoining one by tongued and grooved guides, and anearly water-tight connexion between the two to be made bymeans of an annular inflated hose. Tiinmlling through Mountains.—Where a great thickness ofrock overlies a tunnel through a mountain, it may be necessaryto do the work wholly from the two ends without intermediateshafts. The problem largely resolves itself into devising themost expeditious way of excavating and removing the has led to great advances in speed and economy, asmay be seen from examples in the
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectencyclo, bookyear1910
