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Large load capacity screw piles may have various components such as flat half helices, Bisalloy cutting tips and helices, cap plates or rebar interfaces for connection to various concrete or steel structures. Most industries use screw piling experts due to the cost efficiencies and, increasingly, the reduced environmental impact.
The screw-shaped shaft of an excavated Olivier Pile An Olivier pile is a drilled displacement pile:. [ 1 ] This is an underground deep foundation pile made of concrete or reinforced concrete with a screw-shaped shaft ( helical shaft ) which is performed without soil removal.
The first type of screw conveyor was the Archimedes' screw, used since ancient times to pump irrigation water. [ 1 ] They usually consist of a trough or tube containing either a spiral blade coiled around a shaft, driven at one end and held at the other, or a " shaftless spiral ", driven at one end and free at the other.
Typically in the form of a horizontal wire or rod, or a helical anchor, a tieback is commonly used along with other retaining systems (e.g. soldier piles, sheet piles, secant and tangent walls) to provide additional stability to cantilevered retaining walls. [1]
A screw-propelled vehicle A screw-propelled vehicle is a land or amphibious vehicle designed to cope with difficult terrain, such as snow, ice, mud, and swamp. Such vehicles are distinguished by being moved by the rotation of one or more auger-like cylinders fitted with a helical flange that engages with the medium through or over which the vehicle is moving. They have been called Archimedes ...
A screw conveyor uses a rotating helical screw blade to move bulk materials. Because of its self-locking property (see below) the screw is widely used in threaded fasteners to hold objects or materials together: the wood screw, sheet metal screw, stud, and bolt and nut.
Continuous flight augering (CFA), also known as auger cast piling, is a technique used in construction to create a concrete deep foundation. Description [ edit ]
A double-helical bevel gear made by Citroën in 1927 for the Miřejovice water power plant The cylindrical gear tooth profile corresponds to an involute (i.e. a triangle wave projected on the circumference of a circle), whereas the bevel gear tooth profile is an octoid [ definition needed ] (i.e. a triangle wave projected on the normal path of ...