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  1. LLigetfa

    Culvert with shallow cover frost jacked

    I had planned to use 4 inches of concrete with rebar under the stone. The stone averages 1 - 1/2 inches thick. The path starts out 7 feet wide at the house and narrows to 5 feet at the culvert. I planned to put keyed crack control joints every 12 feet. Right now there is 12 inches from the...
  2. LLigetfa

    Culvert with shallow cover frost jacked

    Yes, I understand how there are side forces as well. That explains why the largest nuts in a tin of mixed nuts come to the top. That is also why I want to encase the round culvert in concrete that is wider at the bottom. My thoughts were to make it 2 feet wide at the base with 6 inches of...
  3. LLigetfa

    Culvert with shallow cover frost jacked

    Yes, I had considered a scupper but SWMBO would never approve it. She also refuses to discuss the smaller culvert/heat tape option. You did not express an opinion on using foam insulation under concrete. Would 4 inches of foam under 6 inches of concrete below the 10 inch culvert be a close...
  4. LLigetfa

    Culvert with shallow cover frost jacked

    Actually, I should have said D shaped laying on the flat side. If that could work, perhaps putting rigid foam board under the concrete to keep the cold inside the culvert from going deeper than under the walkway might keep everything rising and falling at the same rate. What is the R value of...
  5. LLigetfa

    Culvert with shallow cover frost jacked

    This is my first post to this forum. I design computer networks for a living, not roadways. When I built my home, I had the contractor strip off the foot or so of black clay topsoil down to grey clay and replace with gravel. Unfortunately the gravel was of a poor grade with clay fines in it...

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