What is the most suitable building foundation design to use for say,
a single storey 30m^2 building
on waterlogged, loamy soils
above aluvial sediment which is in places angular?

more info here if needed! 😀
cheers

Concrete raft foundation……..like that, your building will tilt/sink/whatever, all in one go…….as opposed to only half the building doing it 8)

walla, i work as an engineering geologist / geotechnical engineer and regularly design foundations for the type of project you are talking about…

by the sounds of things you have had some sort of investigation done, any trial pits or borehole records you could send me…

sounds like a light weight structure, probably a timber frame? have you got expected loadings for the external walls? is it being tied into an existing building?

lots of Q's so more info needed…

neilforrow(at)hotmail.com

hi neil.
i will gather my information and drop you a mail in a bit.
cheers

Do your own uni homework.

😈

Geotech engineer here too! Didnt think there were too many of us about!

raft

or f-deep piles.

lol…yes it is related to some uni work, im not looking for an answer just some insight/ideas.
To be fair we were told to contact anyone who we deem suitable, already spoken to bgs etc

Dickydutch, would you like some info too?

redthunder, i know what a deep pile is but what is an F deep pile?
cheers

F = Fooken'

new info: its actually going to be a whole faculty building so say 5000m^2 and 10 storeys high.

10 storeys?! Och son, you'll get away with 600mm wide single layer of mesh shallow strip founds. Honest… 😉

heh heh! I knew it. I've got a course work to hand in this month too. Plate girders etc for me. Best of luck with it.

Zedshead 😀 luckily for us a proportion of marks are for obtaining outside information and doing leg work contacting people, we were not taught about foundations specifically for this reason.

i'm compiling a short word document stating the brief and what i know at the minute, would anyone else be interested?

Kit? Redthunder? You will all of course be acknowledged in the report.

Yeah what the hell. Don't think I'll be much help, but interested in what info you've been given! Drop me an email.

Ok, Neil and Kit YGM.

Piles! though take into consideration negative pore pressures in the upper layers adding to the load on the piles. Been a while since I designed my last pile so may have got that bit wrong but I put piles in for most things :p

lol, the founds are gonna cost more than the building. Done that before and the design team meetings were always interesting 😉

😆 how much (very roughly or as %of total build) do you think they would cost Andy?

do you guys recommend any books/websites/guides etc that might be of use looking at please?

You may be better off buying a second hand oil rig.

Either that, or design the ground floor as a basement for when it becomes one!

try this
http://www.sbe.napier.ac.uk/projects/piledesign/guide/index.htm

Elements of Soil Mechanics (8th Edition) is a pretty good text book

40mpg…lol, i shall include that in my report

zedsdead, very interesting thank you, any more folks?

Ring stent! Then ring mr cropper!

Walla, thanks for the info, will get something back to you in a bit. I have got a few refs you can have too.

Neil

wrightyson…i dont get it? lol sorry! ring stent makes sense but not the rest what do you mean?

Neil, thank you

wrightyson – Member

Ring stent! Then ring mr cropper!

Stent = piling company

walla24 – Member

wrightyson…i dont get it? lol sorry! ring stent makes sense but not the rest what do you mean?

Neil, thank you

Mr cropper = one of these to cut the piles down to allow you to cast the capping beam onto the piles.

😯 wow. i understand now thank you.

walla – got your email, thanks! Er, there's not really much site specific info is there?!

Essentially, your foundations are going to depend on groundwater at the site and how they affect the soil strength as well as the stability of any foundation excavations. Haven't studied your desk study info in much detail but if the site is seasonably flooded then the site would need upfilling to prevent flooding, which will also influence foundations. Piling is not necessarily a given btw! Also foundation loads (and therefore foundation type) depend on how the building is designed…

Its pretty hard to say without much more info, specifically site investigation information.

Piling with ring beams or pre-cast foundations is clearly the safest bet. Costs will vary based on the loads they are designed for (e.g. building design) and the depths they must go to. However, you may get away with strip foundations on surcharged upfill or rolled and compacted engineered upfill. Good S.I. information is essential!

Good S.I. information is essential!

try telling some clients that 😉

try telling some clients that 😉

That's when you start specialising in arse-covering 😀

]Kit- thank you.

Yes the site is seasonally flooded , around twice a year for 2 week periods.

Indeed, more info would be great, i cant do any onsite work myself, where else could i look?

Im going to go look up all the terms you just used 😳 and check back in the morning.

Thank you all

OOPS! sent you all the wrong file, will find and resend the proper file to you all now!

THANK YOU ALL! for your help, so good to get advice and ideas from people who know their stuff.

and hey, if anyone is need of staff i'm graduating in a month 😉