HDPE and other geomembranes are fantastic barriers for water retention and contamination containment. However, their Achilles' heel is puncture from sharp objects in the subgrade or overlying material. This is where geotextile fabric steps in as an indispensable protection layer.
In pond construction, after grading the earth, a layer of non woven geotextile is placed over the soil. This geotextile fabric for pond applications serves two roles: First, it provides a smooth, uniform surface that minimizes stress points on the liner. Second, and most importantly, it acts as a puncture resistant cushion, absorbing point loads from small rocks or roots. A needle punched geotextile is ideal here due to its thickness and cushioning properties.
In landfill engineering, the stakes are even higher. The basal liner system, which prevents leachate from contaminating groundwater, is a complex sandwich of clay and geomembranes. A geotextile for geomembrane protection is installed both below and above the primary liner. The lower layer protects it from the compacted clay and any angular drainage aggregate. The upper layer protects it from the drainage gravel and waste itself. The fabric must have high puncture resistance and also allow for gas and liquid transmissivity in certain designs.
Selecting the right fabric involves assessing the expected puncture threats (stone size, angularity) and the pressure from overburden. The geotextile fabric for landfill needs to maintain its protective function for decades under constant load. At our company, we produce specialized heavy duty non-woven fabrics engineered for this critical protection role, helping to ensure the long-term integrity and environmental safety of containment structures worldwide.
