Functions of geosynthetics separation

Separation a permeable barrier placed between subsoil and coarse stone to maintain the bearing capacity of the hardcore layer 

6 Separation function (a) Without geotextile and (b)With geotextile. 

The soil retention function of the geotextile separator can be seen as similar to the geotextile filter, in that for a suitable separator the AOS of the geotextile must be related to the particle size distribution and, as stated under the filtration function, this aspect will be considered in more detail later when describing the relationship between structure, properties, and functionalities of geotextiles. 

When the aggregate layer is subjected to loads, significant local stresses are created in the separator. The separator must therefore be of sufficient strength to withstand these stresses. The bursting strength, localised tensile strength properties, and puncture resistance are of specific importance to the separation function. 

Subsoil push up on geotextile resulting from force of Fa 

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