. Railway maintenance engineering, with notes on construction . udicious to retain a thin layer of sand so as to prevent the largerpieces of broken stone from entering into the clay. As will appear from the section shown in Fig. 106C, a depres-sion in the clay was shown not to have taken place, and only afew of the broken stones had gone through the sand to the emptying the box only a very unimportant depression wasnoticeable. Finally, the behavior of the foundation layer was investi-gated, and after the fourth tamping the section shown in was taken. The stones of the foundati
. Railway maintenance engineering, with notes on construction . udicious to retain a thin layer of sand so as to prevent the largerpieces of broken stone from entering into the clay. As will appear from the section shown in Fig. 106C, a depres-sion in the clay was shown not to have taken place, and only afew of the broken stones had gone through the sand to the emptying the box only a very unimportant depression wasnoticeable. Finally, the behavior of the foundation layer was investi-gated, and after the fourth tamping the section shown in was taken. The stones of the foundation layer had pene-trated the clay rather deeply, and not only those in the center, butalso stones on the sides, from which we can conclude that theforce transmitted through the tie had distributed itself nearly overthe entire width of the box. Hence, the most favorable distribution of forces is accomplishedby the use of ballast of broken stone, with or without a founda-tion layer. The latter is, however, not suitable in a yielding sub- 182 RAILWAY MAINTENANCE. H-l g H o m
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1915
