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Retaining Wall Drainage

Discussion in 'Water Features' started by EngineeringDude, Apr 7, 2019.

  1. EngineeringDude

    EngineeringDude LawnSite Member
    Messages: 3

    I am new to retaining walls, is a drainage system required for the wall? If so, how long does a wall hold up without one?

    Also, I read somewhere where you can put 3/4 stone instead of pipe or a drain.
     
  2. JMK26

    JMK26 LawnSite Fanatic
    Male, from Missouri
    Messages: 9,533

    If you have to ask then you're not really an engineering dude are you?
     
    m_ice, iand and TPendagast like this.
  3. TPendagast

    TPendagast LawnSite Fanatic
    Male
    Messages: 15,648

    Yes you need drainage
    No it’s not a good idea to build most styles of wall without one
    The pipe AND the stone is required to do it right
     
    zlandman, m_ice and hort101 like this.
  4. TPendagast

    TPendagast LawnSite Fanatic
    Male
    Messages: 15,648

    There’s not an lol button .... :(
     
  5. iand

    iand LawnSite Bronze Member
    Messages: 1,085

    I don't know about where you are but here anything over 3' requires plans,permits before you can legally build it
     
    hort101 likes this.
  6. TPendagast

    TPendagast LawnSite Fanatic
    Male
    Messages: 15,648

    It’s 4’ Here
     
    m_ice, hort101 and GrassManKzoo like this.
  7. OP
    OP
    EngineeringDude

    EngineeringDude LawnSite Member
    Messages: 3

    I have a degree but I have never really worked as an engineer (except in internships). I’ve been out of college for a few years l, so I’ve forgotten my stuff too.

    I do find that comment to be humorous though.
     
    hort101 likes this.
  8. Mac-s Lawn & Snow

    Mac-s Lawn & Snow LawnSite Member
    Messages: 136

    You should look for a tech sheet for the type of block you are using. This will have the engineering specs on how to properly build a wall for your situation. Follow these and your on your way to building a proper wall.
     
    m_ice likes this.
  9. zlandman

    zlandman LawnSite Senior Member
    from Ohio
    Messages: 278

    I work with engineers, many have little practical world experience. Put in at least 12 inches of either 57, 8, 9 stone or gravel. If using 57s wrap the pipe in fabric. In all cases separate the soil from stone with fabric including top. Include a perforated drain pipe at the base with good outlet. Anything over 5ft tall I wouldn't attempt at your experience level.
     

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