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This winter was a disaster for my layout, I have concrete down 3" thick with rebar you get from highways(got it free, love the price) that 1" green rebar, drove rebar down 3-4 ft in the ground and tied the other rebar to it, then poured concrete. We did have a bad year with moisture/freezing temps/rain then freezing, had major heave, cracked the concrete in 5 different places, my bridge abutments took the most damage, and I drove 2 pieces of rebar in the ground to make sure they stayed firm. My project last fall when I drove 1.5 in PVC in the ground 24-30 in in the ground then put Trex around on the PVC(ladder method) came out fine, no heave at all, level as can be. My question is why? Is it because the PVC is hollow? Then the dirt can heave in the middle of PVC? Curious to hear you guys opionons. Then when I rebuild my layout, am thinking how do I do my abutments then? With PVC and concrete? I have to cut out sections of the concrete because its cracked so bad and does not align anymore. So I have to replace it, like the PVC way because it was easy and so far lasted a whole lot better than my concrete did. But I am not sure how to do the abutments of my 2 bridges, and more to come.
Look forward to some of your thoughts.
Tom h
Look forward to some of your thoughts.
Tom h