. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . ilf Fig. 135. — Ballast Experiments — Schubert. Six inches of sand and 6 inches of stone. over the entire width of the experimental box (27^ inches to 29| inches wade)is noticeable. The distribution of the force is consequently double that ofthe previous experiment. Still more favorable appears this distribution when the height of the stoneballast is increased. In doing this, it is judicious to retain a thin layer of sandso as to prevent the larger pieces of brok
. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . ilf Fig. 135. — Ballast Experiments — Schubert. Six inches of sand and 6 inches of stone. over the entire width of the experimental box (27^ inches to 29| inches wade)is noticeable. The distribution of the force is consequently double that ofthe previous experiment. Still more favorable appears this distribution when the height of the stoneballast is increased. In doing this, it is judicious to retain a thin layer of sandso as to prevent the larger pieces of broken stone from entering into the clay. 182 STEEL RAILS As will appear from the section shown in Fig. 136, a depression in the clay hasnot taken place, and only a few of the broken stones have gone through thesand to the clay. In emptying the box only a very unimportant depressionwas Fig. 136. — Ballast Experiments — Schubert. Stone with thin layer of sand. Finally, the behavior of a foundation layer was investigated, and afterthe fourth tamping the section shown in Fig. 137 was taken. The stones ofthe foundation layer have penetrated the clay rather deep, and not only thosein the center, but also stones on the sides, from which we can conclude that
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Keywords: ., bookcentury1900, bookdecade1910, bookidsteelrailsth, bookyear1913
