999.
This paper describes the composition, construction and uses of the rather special range of geotextile composites which have generally become known as ‘fin drains’. It tries to provide a generic definition of the term ‘fin drain’ which encompasses all current commercial products, and foreseeable types. In particular, it excludes composites which are intended for, or which function as, either pressure-driven water transporters, or capillary driven systems. Pressure-driven drains include, in particular, those drains commonly known as ‘wicks’ which are used for the relief of excess pore pressure in soft ground construction work. Similarly, a number of geotextiles have the facility of passing water within their plane by virtue of internal capillary attraction generated at the interfaces of the composite fine fibres. Such products transmit only small volumes of water, and their intended functions and design principles are entirely different from those of ground fin drains in the sense included in this paper.
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