![]() These layers take the form of geotextiles, geogrids, and rock. In cases where the armor layer will be subjected to vehicular loading in addition to the hydraulic conditions, additional layers may be necessary to better distribute the wheel loads, allow for improved drainage, and contain/ separate the drainage layer from the other layers. More complex erosive conditions demand differing protection measures. For example, this type of system is applied in a landfill down-drain chute.įigure 1: Typical cross sections for articulated concrete block (left) and tapered articulated concrete block (right) This is used for situations where the erosive threat is flowing water and little, if any, other surface loading is expected. The simplest hard armor system involves a geotextile layer directly on top of the subgrade, held in place by an articulating concrete block layer. Two typical armor system sections are shown in Figure 1. Choosing the right subgrade protection is just as important as selecting the right armor layer. Proper analysis of the site conditions, assessing the expected hydraulic and hydrologic conditions, determining the desired design life of the system, and outlining the intended level of protection are all crucial to a successful installation. In some specialized circumstances, as many as five layers above the subgrade may be necessary. ![]() ![]() For this reason, all such systems involve more than one layer. The application of a hard armor system such as articulating concrete blocks as an erosion control mechanism demands diverse performance characteristics, only some of which are accomplished by the armoring itself. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |