Topic outline

  • Gradation Design of Sand and Gravel Filters used in Embankments and Hydraulic Structures

    Credits: 3 PDH

    PDH Course Description:

    This course presents criteria for determining the grain-size distribution (or gradation) of sand and gravel filters needed to prevent internal erosion or piping of soil in embankments or foundations of hydraulic structures. These criteria are based on results of an extensive laboratory filter study carried out by the Soil Conservation Service at the Soil Mechanics Laboratory in Lincoln, Nebraska, from 1980 to 1985.

    Topics:

    • Basic purpose of filters and drains
    • Permeability and capacity
    • Determining filter gradation limits

    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 comprehensive knowledge of geotextile applications and design procedures.

    Publication Source: US Corp of Engineers (Unified Facilities Criteria)

    Donald Parnell, PE
    • Topic 1