Engineering and Construction

Geonets are three-dimensional netlike polymeric materials used for drainage (i.e., flow of water within the geosynthetic). Figure 17.5 shows a photograph of a geonet. Geonets are usually used in conjunction with a geotextile and/or geomembrane, hence geonets are technically a geocomposite.

Depending on the particular project requirements, different types of geosynthetics can be combined together to form a geocomposite. For example, a geocomposite consisting of a geotextile and a geomembrane provides for a barrier that has increased tensile strength and resistance to punching and tearing. Figure 17.6 shows a photograph of a geocomposite consisting of a textured geomembrane, geonet, and geotextile (filter fabric).

FIGURE 17.5 Photograph of a geonet.

FIGURE 17.6 Photograph of a geocomposite. The geocomposite consists of a geonet having a textured geomembrane on top, and a filter fabric (geotextile) on the bottom.