The fields of application for employment may be: road tunnels, rail tunnels, mine shafts, underground constructions, service tunnels, etc..
Its main functions are:
In the UNE 104424 (placing. systems waterproofing tunnels and galleries with prefabricated thermoplastic sheets PVC-P) gives the minimum values that must be met for this geotextile application, distinguishing open tunnels and tunnels dug into segments and tunnels. Here we see a comparison between the standard geotextiles and Geotesan geotextiles .
Defining the minimum mechanical and hydraulic properties of the geotextile, depending on the type of tunnel.
|Metal framed||Standard||Aggregate 0-4 mm||Aggregate 0-8 mm||0-16mm aggregate|
|R. Tensile KN / m||UNE EN ISO 10319||15||18,5||18||18,5||21||23|
|Elongation at break%||UNE EN ISO 10319||80/40||60/65||80/40||60/65||80/40||60/70|
|CBR resistance (N)||UNE EN ISO 12236||2500||3500||3000||3500||4000||4000|
|K in the plane m / s to 200 kpa||UNE EN ISO 12958||10-7||7x10-6||10-7||7x10-6||10-7||8x10-6|
Therefore, depending on the type of tunnel, the minimum Geotesan geotextile valid in each type of application is as follows:
On the other hand, the geotextile must meet the characteristics specified in EN 13 256 (requirements for use in the construction of tunnels and underground structures). These features are:
|Application Fields||Main Features||Protection Functions|
|Tensile||EN ISO 10319||H|
|Elongation at maximum load||EN ISO 10319||H|
|Dynamic perforation resistance (cone)||ENs 918||H|