Landfill LeachateCollection Pipe Design

Solid Waste Association of North AmericaPalmetto ChapterSpring ConferenceMay 18-20, 2016 Ali Khatami, Ph.D., P.E.SCS Engineers

Discussions

• Clogging at Leachate Collection Pipes• Traditional Design of Leachate Collection

Pipes• Innovative Design of Leachate Collection

Pipes• Construction Details

Clogging Issue

• Large quantities of leachate passing through a small area of geotextile potentially causes clogging

• Clogging reduces flow of leachate through geotextile

• Clogging of geotextile at leachate collection pipe potentially impedes free flow of leachate into the pipe

Traditional Design of LeachateCollection Pipes

What is solution ??

Eliminate geotextile

Innovative Design of LeachateCollection Pipes

Geomembrane at Base and throughLCS Trench

Geocomposite Drainage LayerTerminated at LCS Trench

Geotextile Cushion in LCS Trench

Geonet Cushion in LCS Trench

Geocomposite Tied to Geonet

Gravel above Geonet for Pipe Support

Pipe Placed above Gravel

Pipe in LCS Trench

Gravel Placement in Progress

Pipe and Gravel In-place

Geotextile Pulled Over Gravel

Geotextile Sewn to Geocomposite

Geotextile Installation

Geotextile In-place and Sewn

Sand Scooped Over Geotextile

Lower Portion of Completed Cell

Middle Portion of Completed Cell

Upper Portion of Completed Cell

Thank You for Your Time