Is a drainage geocomposite (GCD) for vertical drainage of trenches or similar. It is made by thermobonding a 3-dimensional drainage mat of extruded polymer monofilaments between two filtering geotextiles that may also perform as separation or protecting layers. The 3d core of the mat has a biconical cuspated shape. The lower edge of the MacDrain® TD roll has an extended geotextile pocket into which a polymer collection pipe can be installed on-site, to rapidly form a trench drainage system.
This solution is often used alongside highways and railways to provide long-term reliable vertical drainage capacity.