International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 310
oportion of large stones should show on bothfront and back and extend well into the wall, binding thewall compactly together, as shown in Fig. 396. RETAINING W^ALLS. 1480. A retaining -wall is one for sustaining thepressure of earth, sand, rock, or any other substancedeposited behind it after it is… … Fig. 397. of the angle of ordinary earth filling, viz., 1^ horizontal to1 vertical. Railway tracks entering towns, especially wherethey cross or crowd other lines, terminal grounds, etc.,invariably require retaining walls. The pressure exertedby the backing will vary greatly, depending upon the…
Railroad engineering
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