Geosynthetics in roads and pavements


INSTALLATION OF GEOSYNTHETICS



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Bog'liq
handbook of geosynthetics

INSTALLATION OF GEOSYNTHETICS 

FOR ROADBASE DRAINAGE 

 

New Construction 

When constructing a new road with an open 

graded base course designed to also provide 

blanket drainage, a filtration geotextile is 

deployed prior to placement of the base course 

in the same manner as a separation geotextile 

Commonly, the base course terminates along the 

road edges into deepened edge drains.  These 

edge drains should also be wrapped with the 

geotextile as shown in the above photos. 




                                                       GEOSYNTHETICS IN SUBSURFACE DRAINAGE:                                                      27 

Subgrade Dewatering, Road Base Drainage, and Structure Drainage 

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

Retrofit  

Excavations for retrofit edge drains should be 

done in such a way so as to prevent large voids 

from occurring in the sides and bottom of the 

trench. The edge drain can be an aggregate 

trench drain with a collector pipe in the bottom.  

 

 

 



 

 

The trench is “lined” with the filtration geotextile prior to 



pipe and aggregate placement. 


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