Changes

===Backfill Granular and Pipes (JC)===               

===Backfill Granular and Pipes (JC)===               

'''Geotextile'''

'''Geotextile'''<br>

 

Geotextiles are filter fabrics that can be installed to separate dissimilar soils and prevent the migration of materials. As such, proper installation of geotextiles is important for ensuring the proper division of materials.

Geotextiles are filter fabrics that can be installed to separate dissimilar soils and prevent the migration of materials. As such, proper installation of geotextiles is important for ensuring the proper division of materials.

Construction Steps:

Construction Steps:

*Excess material should be folded on top of the infiltration medium/choker course once installed

*Excess material should be folded on top of the infiltration medium/choker course once installed

*Provide cuts for trees where appropriate

*Provide cuts for trees where appropriate

Key Inspection Points:

Key Inspection Points:

*Inspect the geotextile to make sure it is clean and free of damage

*Geotextile is clean and free of damage

*Ensure that the geotextile delivered to the site matches the design specifications and is approved by the engineer prior to installation

*Geotextile delivered to the site matches the design specifications and is approved by the engineer prior to installation

*Check that sufficient overlap is provided between lengths of fabric

*Sufficient overlap is provided between lengths of fabric

*Confirm that geotextiles have been applied as per the manufacturer’s guidelines

*Geotextiles have been applied as per the manufacturer’s guidelines

*Confirm that structural considerations for geotextiles that are applied adjacent to infrastructure

*Structural considerations for geotextiles have been made when applied adjacent to infrastructure and the geotextile can handle expected structural loads

 

Mistakes to Avoid:

Mistakes to Avoid:

*Wrinkles in the fabric – follow the manufacturer’s procedure for installation to ensure geotextiles lie smooth on sub-grade

*Wrinkles in the fabric – follow the manufacturer’s procedure for installation to ensure geotextiles lie smooth on sub-grade

*Unnecessary application of geotextile – mixing of media is negligible where structural loads are not expected, so geotextile does not need to be applied. Also geotextiles should not be used where root growth is encouraged to penetrate different layers of media

*Unnecessary application of geotextile – mixing of media is negligible where structural loads are not expected, so geotextile does not need to be applied. Also geotextiles should not be used where root growth is encouraged to penetrate different layers of media  

 

For more information on geotextiles, see the page on geotextiles.

For more information on geotextiles, see the page on geotextiles.

'''Impermeable liner'''<br>

'''Impermeable liner'''<br>