Root penetration protection layer

The area of the dam sections along the Main-Donau Canal had developed extensive reed growth. The sections sealed with asphalt were penetrated by reed roots and permanently damaged. The concept envisaged removing the revetment, as well as removing the reed vegetation, the asphalt surface cleaning and laying the anti-root layer before installing the revetment stones again.

TILTEX 10 Plus 1,5 mm was laid as a root penetration protection layer, by means of a temporary laying traverse adapted to the angle of the embankment. It is a fully needlepunched, multilayer geotextile consisting of a sand-cement mixture bound between two layers of geotextiles.

In this case TILTEX was laid without joints or overlaps. The roll lengths were adapted to the application. This enabled the unique combination of a root penetration-proof and mechanically robust protection layer without the need for additional equipment and machinery, such as concrete mixer/concrete pump etc. at the construction site. The daily laying capacity was not limited by the problem of on-site concreting, but was determined by the speed of the laying machine or excavator. Compared to on-site concreting, the input of concrete is much lower.

In this application, the TILTEX 10 Plus 1,5 mm was not activated after installation in order to achieve optimum cladding of the revetment stones. Even non-activated state of the "concrete layer", is mechanically sufficiently robust to prevent damage to the plastic geomembrane when applying the revetment stones.

Fixing with pegs is possible as an option, but not absolutely necessary as long as the TILTEX 10 Plus 1,5 mm is laid horizontally.