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Old concrete sleepers can be used for things like retaining walls, else they might be crushed to recycle gravel and the steel reinforcing. [ 9 ] Special sleepers may be necessary on extremely sharp curves, such as the new triangle at Newmarket, New Zealand on the 1,067 mm ( 3 ft 6 in ) gauge of radius 95 m (312 ft).
In recent years, wooden railroad ties have also become popular for gardening and landscaping, both in creating retaining walls and raised-bed gardens, and sometimes for building steps as well. Traditionally, the ties sold for this purpose are decommissioned ties taken from rail lines when replaced with new ties, and their lifespan is often ...
The original plan required the construction of 33 tunnels, at a cost of 5.3 million rubles, a retaining wall for 3.7 million rubles, and viaducts for 1.6 million rubles. With regard to the possible negative impact caused by the lake water, the minimum necessary height of the track route over the water of Baikal was calculated to be 2.5 sazhens ...
Railroad development kept pace with the expanding frontier in the United States after the American Civil War, creating a burgeoning need for new railroad ties. Every mile of track required about 2,500-3,500 crossties. Trains became heavier and faster and the railroads found it was less expensive to add more ties per mile than to buy heavier ...
The tieback-deadman structure resists forces that would otherwise cause the wall to lean, as for example, when a seawall is pushed seaward by water trapped on the landward side after a heavy rain. Tiebacks are drilled into soil using a small diameter shaft, and usually installed at an angle of 15 to 45 degrees.
The federal government has pledged nearly $1.1 billion to help the N.C. Department of Transportation begin building a modern passenger rail line between Raleigh and Richmond, Virginia.. In reality ...