Topic outline

  • Design and Construction of Filter Diaphragms

    Credits: 4 PDH

    PDH Course Description:

    Embankment failures and accidents occur more often in the vicinity of conduits in the embankments than at other locations. Conduits that extend through and under embankment structures are a discontinuity in the structure. Several common problems which are caused by conduits are discussed in this course.

    Two design measures have commonly been used to address the concern about flow through the earth fill surrounding conduits. They are (1) anti-seep collars and (2) filter diaphragms.

    Topics:

    • Background of filter diaphragms
    • Anti-seep collars
    • Hydraulic fracture
    • Filter diaphragm
    • Design of filter diaphragm
    • Dimensions of filter diaphragms
    • Filter and drain gradation
    • Specifications and density quality control for filter sands
    • Method placement specification
    • Performance specification
    • Quality control
    • Method specifications
    • Performance specifications
    • Installation of filter diaphragms
    • Methods of construction

    To take this course:

    1.) Enroll in Course: Click below to enroll:
    (must be logged into your user account)


    2.) Study: Once enrolled, click below to begin the course:

    Download the Study Guide

    3.) Test: Once you've thoroughly read the course materials, please click below to take the final examination.

    Take the final exam

    4.) Certificate: A passing grade of 70% or higher on the exam, is required to receive the certificate of completion for this PDH course.
         NOTE: After the exam is completed, you will need to return to this page, in order to print (download) the certificate of completion.

    Print the Certificate of Completion

    Intended Audience: This course is intended for Geotechnical, Civil, Environmental, Water Resources, and other engineers whose job description requires a general knowledge of design procedures for filter diaphragms.
    Publication Source: USDA NRCS

    Donald Parnell, PE

    • Topic 1