RE:RE:RE:RE:RE:RE:RE:Diavik A21 dyke relevance to R780suddzie,
The porous, unconsolidated sand and gravel is at least 50 meters thick and water charged. The hydrostatic head would be higher at PLS, but not relevant because the high density slurry holds back the sands and gravels from sloughing into the section under construction, and then displaced with either concrete or clay from the bottom up, so the slurry can be re used in the next section of retaining wall. Also not factored in is the cost of notching bedrock for at least 1.5 meters along the slurry wall to minimize leakage. Then there is the cost of getting through the odd large boulders. All in all, I believe dyke costs will come in about $400-$500 million more and take a year longer build.
sudzie191 wrote: Yes yes yes the glacial till is thicker, but can you calculate the hydrostatic head of 35 meters of water directly against a dyke? Do you even know how to do that? lol
THats somewhat much more formidable than the hydrostatic pressure against the wall of a grout curtain supported by vibrocompacted dyke.
Would you like the phone number of BGC Engineering so you can talk to them, instead of imaginining nonsense?
And do you understand that all of that construction equipment being used for A21 is rather expensive, and will be finished up there on A21 just in time and certainly before the R780 dyke needs it. So do you understand that will be a big saving on capital cost for R780.
As I said some of us are technically and managerially competent enough to check out things like that, so we don't have to believe your nonsense. HighROI wrote: Sudzie quote us the bedrock depth again so we can have another good laugh.