Case study – Clogging of a geotextile/geopipe system in a landfill drainage application.

Agustus 11, 2021 by admin in Uncategorized

Fleming, I.R. & Barone, F.S. & Dewaele, Paul. (2010).

9th International Conference on Geosynthetics – Geosynthetics: Advanced Solutions for a Challenging World, ICG 2010. 1127-1130. In 2004, a drainage system was installed near the toe of a municipal landfill serving the city of Barrie, Ontario. The drainage system consists of 300 mm diameter perforated HDPE pipe and is intended to prevent leachate-contaminated groundwater from reaching a small stream via seepage through the surficial sand deposits which dominate the local area. The double-walled pipe is constructed with smooth inside walls and corrugated outside walls, wrapped with a lightweight heat-bonded nonwoven geotextile. The perforated pipe was installed 3 to 5 m below ground surface within fine aggregate (concrete sand) backfill placed in the trench excavated below the water table into the native sands. In 2007, visual evidence of leachate impact to the stream led to an investigation. This investigation included video inspection of the inside of the drain, measurement of hydraulic heads in the immediate vicinity, and an exhumation and sampling of the drainage system at three locations. Samples of the drainage pipe and the geotextile wrapping were tested for permeability and the nature of the mineral clogging was evaluated. Laboratory testing showed the permeability of the geotextile had decreased by 50X on average. The channels of the geopipe were largely full of clog material and many of the perforations were completely blocked. This paper presents the results of the investigation and compares the unclogged and clogged hydraulic conductivity of the geotextile and the sand backfill. The performance of the drainage ribs in the corrugated geopipe is evaluated and the factors influencing the selection of design components of the replacement system are discussed.

Article Source by https://www.researchgate.net/publication/287029328_Case_study_-_Clogging_of_a_geotextilegeopipe_system_in_a_landfill_drainage_application
Upload by Evi, PT Shuanglin Pipe Indonesia