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HDPE & Frost Heave

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  • Member since
    October 2006
  • From: Wisconsin
  • 153 posts
HDPE & Frost Heave
Posted by skippygp123 on Thursday, July 3, 2008 7:32 PM

I have checked the Family Garden Trains website and have read the article about using HDPE for supporting the track.  What I'm concerned about is frost heave.  I live in northwestern Wisconsin and the article said not to pound the vertical supports below the frost level.  I don't understand how that keeps the track from heaving due to the contraction of the soil.  Can anyone help me figure this out?

I plan to start building my garden railroad within the next 2 weeks and don't want to make a bunch of errors that I'm going to have to correct.

Thanks!

I do not suffer from insanity...I enjoy every minute of it!!!      Over 60 and still playing with toys!

  • Member since
    February 2004
  • From: North, San Diego Co., CA
  • 3,092 posts
Posted by ttrigg on Thursday, July 3, 2008 11:39 PM

Skippy:

Since I live in sunny SoCal, and have a frost line of about zero, I have no experience with your issue.  That said, I do agree with you that the article is in error.  Everything I've read has emphasized the point of getting below the frost line.  Lets see if someone in your climate zone will speak up.

Tom Trigg

  • Member since
    July 2006
  • From: Omaha Ne
  • 37 posts
Posted by Don H on Friday, July 4, 2008 6:27 AM
Just got done rebuilding my layout. Used the ladder method I ran my poles down 24". I drill a 3" hole 20" deep, drove the pipe in another 4", then back filled. 
  • Member since
    October 2006
  • From: silver spring, md
  • 1,232 posts
Posted by altterrain on Friday, July 4, 2008 11:28 AM

Just dig your holes a little deeper and use a back fill of gravel instead of soil. That should reduce the problems associated with frost heave. My soil rarely freezes more that a few inches but we do get many freeze/thaw cycles during the winter which can be worse.

A small power auger with a 2 inch bit (like I used in the link in other post) will dig those holes lickety split.

-Brian 

President of
  • Member since
    July 2006
  • From: Omaha Ne
  • 37 posts
Posted by Don H on Saturday, July 5, 2008 7:06 AM

Brian,

  Where did you find a 2" auger? The smallest I could find was 3". It wasn't really a auger it was to chain up a dog.   

 

  • Member since
    October 2006
  • From: silver spring, md
  • 1,232 posts
Posted by altterrain on Saturday, July 5, 2008 11:51 AM

It's a one man Badger auger than I use for work. I have 2 and 6 inch bits for it. I use the 2 inch for planting bulbs and hundreds of little groundcover plants -

http://www.amleo.com/index/item.cgi?cmd=view&Words=3048 

 

-Brian 

 

President of

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