TIL French drains aren't from France.
TIL French drains aren't from France.
I would post this in the old tech sub but this is in use all over the world today and in some cases with some minor changes to try to make them work better. It might be old tech but it is very useful tech.
Archive: https://archive.today/2ndJL
From the pose:
>In February of 2017, one of the largest spillways in the world, the one at Oroville Dam in northern California, was severely damaged during releases from heavy rain. You might remember this. I made a video about it, and then another one about the impressive feat of rebuilding the structure. In the forensic report following the incident, one of the contributing causes identified in the failure was the drainage system below the spillway. Rather than being installed below the concrete, each drain protruded into it, reducing the thickness of the concrete and making it more prone to cracking. But why do you need drains below a spillway in the first place? Put simply: water doesn’t just flow on the surface of earth. It also flows through the soil and rock below it. Water that gets underneath a structure creates pressure that can lift and move it. That’s especially true when the water is flowing. Dam Engineers deal with the challenge in two ways: make concrete structures like spillways massive (so gravity holds them in place) and use drains to relieve that pressure, giving the water a way out.
I would post this in the old tech sub but this is in use all over the world today and in some cases with some minor changes to try to make them work better. It might be old tech but it is very useful tech.
Archive: https://archive.today/2ndJL
From the pose:
>>In February of 2017, one of the largest spillways in the world, the one at Oroville Dam in northern California, was severely damaged during releases from heavy rain. You might remember this. I made a video about it, and then another one about the impressive feat of rebuilding the structure. In the forensic report following the incident, one of the contributing causes identified in the failure was the drainage system below the spillway. Rather than being installed below the concrete, each drain protruded into it, reducing the thickness of the concrete and making it more prone to cracking. But why do you need drains below a spillway in the first place? Put simply: water doesn’t just flow on the surface of earth. It also flows through the soil and rock below it. Water that gets underneath a structure creates pressure that can lift and move it. That’s especially true when the water is flowing. Dam Engineers deal with the challenge in two ways: make concrete structures like spillways massive (so gravity holds them in place) and use drains to relieve that pressure, giving the water a way out.
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