swazimatt
Civil/Environmental
- Aug 19, 2009
- 278
every time i go over a depressed road crossing repair (where the water company has excavated a trench to re lay a pipe)i wonder if it would not be better practice to bench the trench so that there is more friction on the sides. Basically you would make the excavation a bit wider for the top 150mm then step it in for the next 150mm and then maybe have the same width for the rest of the trench depth.
when you backfill your top two layers will be supported on the existing road layerworks at the edges, but i am not sure if they would have any tensile strength across the trench if there is settlement in the trench bckfill
I never see this happening and was just wondering if it would reduce the effects of settlement/poor workmanship?
when you backfill your top two layers will be supported on the existing road layerworks at the edges, but i am not sure if they would have any tensile strength across the trench if there is settlement in the trench bckfill
I never see this happening and was just wondering if it would reduce the effects of settlement/poor workmanship?