BigH
Geotechnical
- Dec 1, 2002
- 6,012
As most of those in our group knows, I have been working on a earth filled hydro dam in northern Malaysia. It is about 75 to 80 m high (depending on if you go the lowest depression. The foundation work was arduous - we have on the upstream side vertically bedded (but parallel to the dam's axis) sedimentary rock and downstream we have volcanic rock. In between where the core is located is a mix of the two - I always get the dam term wrong (intercalation) The base was very undulating. One of the other features of the dam is the river came down and made a left turn (90 deg) and then a right turn (90 deg) so that the upstream is wider than the core or the downstream (except where the cores lengthens at the top 10 m or so).
We used volcanic residual soil for the clay core - although the residual clayey silt also met the core requirements - hence, acting on the upstream inner shell, we really end up with a double wide core . . . We had to excavate down some 25 m in the hills to reach anything that would be somewhat likened to a sandy gravel . . . Started the dam not knowing what we had for fill (to an Engineer's liking) but we knew we had a lot of hills of residual soil to use.
I have been blessed to have a French Canadian gal working with me who had many years working on Quebec Hydro dams . . . she was fantastic and after we got out of the hole - the base of the dam - she took over many of the details as I also look after a concrete dam some 10 klicks away through pretty rough terrain. Had a good team - a local Malaysian inspector (not an engineer) who would put most engineers in the field to shame . . . Proud of the team we had.
Had a good contractor - poor in the nuances of quality control, though, and we sure ended up doing much yelling and screaming and foot stomping - got so bad that I actually asked his lead project site engineer (who had gone to Ohio State for 3 years) . . . , "Are you sure you didn't really go to Michigan??" - (yes, growing up in Ohio, after Cornell (who, incidentally is 2-0 against Ohio State in football), I am an Ohio State fan! - sadly this year, so far, we are 0-4)
So, am posting a picture of the dam for you to see . . . please keep to your self and not share - unless it goes nameless! - don't want to get in trouble with the client . . . . - but, 'ell, anyone can fly a drone over the dam . . .
Hope you enjoy the picture,
We used volcanic residual soil for the clay core - although the residual clayey silt also met the core requirements - hence, acting on the upstream inner shell, we really end up with a double wide core . . . We had to excavate down some 25 m in the hills to reach anything that would be somewhat likened to a sandy gravel . . . Started the dam not knowing what we had for fill (to an Engineer's liking) but we knew we had a lot of hills of residual soil to use.
I have been blessed to have a French Canadian gal working with me who had many years working on Quebec Hydro dams . . . she was fantastic and after we got out of the hole - the base of the dam - she took over many of the details as I also look after a concrete dam some 10 klicks away through pretty rough terrain. Had a good team - a local Malaysian inspector (not an engineer) who would put most engineers in the field to shame . . . Proud of the team we had.
Had a good contractor - poor in the nuances of quality control, though, and we sure ended up doing much yelling and screaming and foot stomping - got so bad that I actually asked his lead project site engineer (who had gone to Ohio State for 3 years) . . . , "Are you sure you didn't really go to Michigan??" - (yes, growing up in Ohio, after Cornell (who, incidentally is 2-0 against Ohio State in football), I am an Ohio State fan! - sadly this year, so far, we are 0-4)
So, am posting a picture of the dam for you to see . . . please keep to your self and not share - unless it goes nameless! - don't want to get in trouble with the client . . . . - but, 'ell, anyone can fly a drone over the dam . . .
Hope you enjoy the picture,