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2. Concrete sleeper - Wikipedia

   en.wikipedia.org/wiki/Concrete_sleeper

   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).

3. Precast concrete - Wikipedia

   en.wikipedia.org/wiki/Precast_concrete

   The overall thickness of sandwich wall panels in commercial applications is typically 8 inches, but their designs are often customized to the application. In a typical 8-inch wall panel the concrete wythes are each 2-3/8 inches thick), sandwiching 3-1/4 inches of high R-value insulating foam. The interior and exterior wythes of concrete are ...

4. Sleeper wall - Wikipedia

   en.wikipedia.org/wiki/Sleeper_wall

   Essentially it is a wall in the way that it is constructed but a sleeper in the way that it functions. Stretcher bond or header-stretcher bond can be used in these walls. sleeper wall can also refer to a retaining wall made from railroad ties. It is used to prevent erosion. It can be made from bricks or concrete blocks. The wall is often used ...

5. Railroad tie - Wikipedia

   en.wikipedia.org/wiki/Railroad_tie

   A railroad tie, crosstie (American English), railway tie (Canadian English) or railway sleeper (Australian and British English) is a rectangular support for the rails in railroad tracks. Generally laid perpendicular to the rails, ties transfer loads to the track ballast and subgrade , hold the rails upright and keep them spaced to the correct ...

6. Dry stone - Wikipedia

   en.wikipedia.org/wiki/Dry_stone

   The weight of the stones resists the pressure from the retained soil, including any surcharges, and the friction between the stones causes most of them to act as if they were a monolithic gravity wall of the same weight. Dry stone retaining walls were once built in great numbers for agricultural terracing and also to carry paths, roads and ...

7. Embankment (earthworks) - Wikipedia

   en.wikipedia.org/wiki/Embankment_(earthworks)

   An embankment is a raised wall, bank or mound made of earth or stones, that are used to hold back water or carry a roadway. A road , railway line , or canal is normally raised onto an embankment made of compacted soil (typically clay or rock-based) to avoid a change in level required by the terrain , the alternatives being either to have an ...