Manual for railroad engineers and engineering students : containing the rules and tables needed for the location, construction, and equipment of railroads as built in the United States (1883)
Vose, George L. (George Leonard), 1831-1910 · Boston : Lee and Shepard · leaf 119
pressed in so as to be hardlymore than 6. The headings were 4x6 feet, and were run for- 94 MANUAL. FOR RAILROAD ENGINEERS. ward at the top, and not the bottom, of the excavation. Theoriginal section is shown in Fig. 34. But the swelling of the clayso forced in the masonry that 6780 cubic yards of… … Fig. 34- thickness of 36 inches. This was cut out and replaced, first byten, and again by twelve rings of brickwork, or 4 feet 6 inchesof thickness ; and even some of the last had to be replaced. Theshafts had at first alining of brick 9 inches thick ; but this was sopressed in, and the diameter so…
Railroad engineering
Internet Archive · Northeastern University Library · Public Domain Mark 1.0. Free to use for anything.
