Recent content by ab21

Ok thanks all

I did a skim read of that document, it seems to suggest slump of 400mm? Thats too high!

Ok, I was worried high slump could jeoparize the concrete or cause segregation? So you guys are saying using tremie method is ok even if we dont get to groundwater and the high slump could be achieved with other admixtures? Thanks

Hi, I was wondering if anyone has experience in concreting by tremie method. Weve been advised to use this in a location for piled foundations, if groundwater is encountered. Weve decided to use tremie regardless. Would there going to be any issues with using tremie if ground water is not...

Thanks all, you have been very helpful

The pole doesnt have any antennas or other equipment on it and I dont think the client cares about deflection since its not in their design requirements but I know 1.75m is a big number for deflection. The pole is a dead end structure so it will have sustained tension but the moment value I gave...

I use 5% of pole height although I dont think the client cares much about deflection. Thanks

Is deflection an issue for design of transmission structures? I've seen some clients limit deflection under everyday case but I thought transmission design was mainly based on ultimate limit state? and vertical loads for poles are not huge so shouldnt get too much P-delta effect. I take it...

Thank you all for your input, you have been very helpful.

steveh49 Bending moment is 3m below ground level (thats what Ive assumed). Its ultimate moment. I've applied 0.7 reduction factor on soil strength when using Brinch Hansen. Come to think of it, when designing based plate pole, are we assuming that base plate connection to the pile is moment...

Thank you all

Sorry for my stupid question but I havent designed piles before (I have designed pile caps but pile design was given to the contractor). I know maximum moment will be 2000kNm, I've used Brinch Hansen method and I know embedment depth needs to be 8m. The question is how can I design it...

Thank you all. If I were to design a pile foundation, structurally can I design it like a beam (because the soil will restrain it against buckling) or does it have to be designed like a column?

dauwerda and HotRod10 Thanks for your contributions, not doing 10% of height + 0.6m, based on Brinch Hansen method the embeddment depth should be about 8m. I think I will do a cost estimate for using piers as well. This pole only has 5 degree angle on it so works more like a tangent than a...

I will read the document sent. Thanks all for your contributions. The questions I have in my mind at the moment is what is the difference between using a drilled pier and direct embedding the pole? Unless you increase the diameter of the pile the required depth would be the same, and then you...