River Dargle Flood Defence Scheme.
These images were taken during the last week of November, 2016.
We saw some activity here during the latter part of September.
On the stretch opposite the Riversdale apartment complex, we saw them working on a steep slope of the riverbank.
Some 4 years ago the steep part of the bank had been stripped away and a lot of work invested in ‘soil stitching’, intended to stabilise the integrity of such a steep, but ‘exposed’ bank. The soil on the hill behind had been prone to slippage, aggravated by shallow rooting trees etc.
It would seem that yet another strip will have to be similarly treated to ‘preserve’ it’s integrity.
Yea, it begs the question:
Why wasn’t this fully scoped when the first work was being implemented, and/or was it a factor is causing (what I call) erosion-spread?
Check out the images here, taken in August 2012:
The Maniscopic forklift is carrying a platform upon which the contractors have mounted a drilling rig – used to bore drills into the steeply sloped bank, which are then injected with a liquid cement solution and finished out with fastening rods.
The guys are now laying rolls of heavy-duty mesh in long verticals. The mesh is caught around the sunken rods, and secured with an anchor cap to keep in place.
Not sure whether these are bio, or non-bio degradable mesh rolls. But they do look more like synthetic rather than geofabric material.
Posted by O Suave Gigante on 2016-12-01 14:06:04
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