How do corrugations form?

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Originally Posted by joel0407

Nope. They will still create corrugations with my theory. Just mean the whole vehicle jumps and not just the wheel.


The slower the travel the less the vehicle will jump off a bump.

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Road rollers don't make corrugations. They flatten them.

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Originally Posted by Dougal

Road rollers don't make corrugations. They flatten them.

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But they go do slow they don't jump the bumps.

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Originally Posted by Dougal

Road rollers don't make corrugations. They flatten them.

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BULL****.
Andrew

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Originally Posted by Dougal

Road rollers don't make corrugations. They flatten them.

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No they don't. Rollers compact uncompacted soil/fill by removing the voids between particles by either static compaction or vibratory compaction.

how come if you put corrugated iron on the road it goes flat?.....

now there might be something in that....

of course I am blamed for all the potholes in bitumen road in our area. See we found a lot of bits of bitumen that had been dug up, dumped, and collected these to fill the ruts in our driveway [10 inch deep ruts in places]. So, tounge in cheek, my friend Gary accused me of digging these out of all the roads leaving potholes :D:D:D

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Originally Posted by Brian Hjelm

No they don't. Rollers compact uncompacted soil/fill by removing the voids between particles by either static compaction or vibratory compaction.

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And.........

The voids between the currogations become removed by particles shifting during that rolling.;)

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Originally Posted by Dougal

And.........

The voids between the currogations become removed by particles shifting during that rolling.;)

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Not having any experience with rollers myself. I can't see that happening with the corrugations we get here in the NT. Some can be near 300mm apart and 150mm deep. That's a lot of material for the roller to be moving.

Also as said previously these compactions from the corrugations can run very deep from many heavy vehicles running over them for months upon months between grading. I doubt that a roller could compact the material as deep as the compaction from the corrugations.

Happy Days.

There is a section of the Stuart highway near pine creek that your vehicle will vibrate on ,I think this is caused by the old corrugations that were formed before the top surface was put on the road obviously the corrugations weren't completly graded out when the road was built.Some of the Barkly highway has this as well.

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Originally Posted by lewy

There is a section of the Stuart highway near pine creek that your vehicle will vibrate on ,I think this is caused by the old corrugations that were formed before the top surface was put on the road obviously the corrugations weren't completly graded out when the road was built.Some of the Barkly highway has this as well.

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Can remember those sections well lewy. I used to live east of Pine Creek at Moline and that section of road has always been like that. I've also been across the Barkly driving floats a few times - you definitely feel the vibrations in a Mack Ultraliner. ;)