Geosynthetics in roads and pavements

 

The Geosynthetic Solution 

Since geomembranes and GCLs can be easily 

deployed in horizontal, vertical or even 

overhead configurations, they are especially 

useful for waterproofing tunnel linings as well 

as foundation and basement walls and other wall 

structures such as bridge abutments.  

  

Taking advantage of their “sheet-like” nature, 

geomembranes and GCLs can be used to isolate 

or encapsulate water-sensitive roadway soils 

and subgrades in order to maintain the soils at 

their desired water content.  They are also 

quickly and easily deployed as protective covers 

over material stockpiles to prevent 

 

wetting and erosion. 

Geosynthetics, specifically geomembranes and 

GCLs, can offer a more economical, less 

installation-intensive alternative to clay barriers. 

In areas where naturally occurring clays and 

silts are scarce, GCLs can provide the 

impermeability required to protect structures.  In 

addition, it is not always possible to place and 

compact natural clay in non-planar forms as in a 

tunnel lining or wall.  GCLs also  take up less 

space and are somewhat resistant to freeze/thaw 

and wet/dry cycles. 

 

Geomembranes can be effectively incorporated 

into the construction of earthen and earth/rock 

dams which require an impervious core.  These 

structures are traditionally constructed with silts 

and clays.  In addition, concrete dams must be 

protected from seepage into the structure. 

 

Geomembranes are often used to cover the 

upstream sides of these dams.   

 

 

Effective waterproofing includes drainage. 

 

 

Tunnels require sophisticated waterproofing and drainage 

systems – made easier with geosynthetics

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                                                 GEOSYNTHETICS IN SEEPAGE CONTROL SYSTEMS:                                                   51      

Structure Waterproofing, Water Supply Preservation, Environmental Protection 

 

For more information please contact the Geosynthetic Materials Association at www.gmanow.com.