Filter Diaphragm Exhibits
A filter diaphragm is a designed zone of filter material constructed around a conduit. This zone can act both as a drain to carry off water and as a filter to intercept soil particles being transported by the water. A filter diaphragm is an important component of design for both new construction and the renovation of older embankment dams.
Content From Conduits through Embankment Dams (FEMA)
-
Typical Configuration for filter diaphragm used in the design of an embankment dam.
-
Typical configuration for filter diaphragm used in design of an embankment dam. The filter diaphragm should extend into the foundation soils, where an excavation is made for the conduit.
-
Typical configuration for a filter diaphragm used in the design of an embankment dam. The figure shows the location of the filter diaphragm as far downstream as possible, leaving adequate cover over it.
-
Construction of a filter diaphragm within an embankment dam.
-
Filter diaphragm trench excavated and backfilled with sand
Note: The content on this page was originally created as part of DamOutletWorks.org (DOWL, 2018). It has subsequently been updated and reformatted as part of the Dam Safety Toolbox.
Revision ID: 3173
Revision Date: 09/15/2022