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Building On Swamp, How Do I Go, Raft Or Pile? - Properties (3) - Nairaland

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Fencing A Plot In A Swamp. How We Did It. / Construction of a Duplex With Raft Foundation. / Steel Formwork For Drainage And Raft Foundation (2) (3) (4)

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Re: Building On Swamp, How Do I Go, Raft Or Pile? by Reference(m): 6:16pm On Feb 19, 2016
dunkem21:
Pile .. Though it will cost you a fortune ..

Why do you think so.
Re: Building On Swamp, How Do I Go, Raft Or Pile? by Reference(m): 6:20pm On Feb 19, 2016
Teddeebear:
combine raft, pad and pile if you have money …

These are hybrid foundations combining the qualities of both types.
Re: Building On Swamp, How Do I Go, Raft Or Pile? by Reference(m): 6:24pm On Feb 19, 2016
asamaigho:


both foundations are ok,but d cost of pile foundation is higher raft foundation,because even in a pile foundation u stil have top it wit a raft foundation.
a raft foundation for a building of such magnitude could get to 1.5m thick,dats massive concrete as reinforcement.dat may cost u well above 10m naira.
for pile
a steel hollow pipe,say 24" pipe cost about 600k or there abt,hmmmm,multiply by d total number of columns ,lets assume 35,hmm dats alot of money.den u have to connect all piles with well reinforced beams,den cast the floor with a raft foundation of about 600mm thickness.

the bottom line is both foundations are ok,the cost is what u should b comcerned about.

finally foundation is very important in a building.so please get a civil engr dat is specialised in geotech for proper soil investigation and test.
2 get a civil engr dat is specialised in structural eng.


please dont go for roadside. brick layer oo hmm.
Re: Building On Swamp, How Do I Go, Raft Or Pile? by Reference(m): 6:27pm On Feb 19, 2016
asamaigho:


both foundations are ok,but d cost of pile foundation is higher raft foundation,because even in a pile foundation u stil have top it wit a raft foundation.
a raft foundation for a building of such magnitude could get to 1.5m thick,dats massive concrete as reinforcement.dat may cost u well above 10m naira.
for pile
a steel hollow pipe,say 24" pipe cost about 600k or there abt,hmmmm,multiply by d total number of columns ,lets assume 35,hmm dats alot of money.den u have to connect all piles with well reinforced beams,den cast the floor with a raft foundation of about 600mm thickness.

the bottom line is both foundations are ok,the cost is what u should b comcerned about.

finally foundation is very important in a building.so please get a civil engr dat is specialised in geotech for proper soil investigation and test.
2 get a civil engr dat is specialised in structural eng.


please dont go for roadside. brick layer oo hmm.

24 inch casing? Those are displacement/driven piles? Haba. There are far cheaper pile systems for buildings.
Re: Building On Swamp, How Do I Go, Raft Or Pile? by feeloscar(m): 6:31pm On Feb 19, 2016
femliany:
Do you need a soil text again in swampy area?no is the answer.Just get a sound structural engineer to design the number of iron rod and the type to use for you and to save cost,you can go for Raft..for granite and sharp sand,u can get in touch with me
Who told you he doesn't need soil tests? Structural Engineers do not design "number of iron rod and the type", they design structural members of which reinforcement is a part.
Re: Building On Swamp, How Do I Go, Raft Or Pile? by Reference(m): 6:52pm On Feb 19, 2016
LagosObama:
You've made the first mistake by filling the site before commencing your foundation because you will
either have to allow the filled up sand to settle (which could take years!!) or dig deeper to more solid ground. Please follow
advice on this thread to employ a competent structural engr who can advise you further before you make more
mistakes!

No. He has not made a mistake in filling. It does not hinder geotechnicals and it can be a good working surface for men, materials and machines.
Re: Building On Swamp, How Do I Go, Raft Or Pile? by Reference(m): 7:07pm On Feb 19, 2016
ridious:
Both raft and pile are two good options but as for me, i would imploy you to go for raft, its owk if you can endure the cost... Pile foundations are mostly used for bigger project.. I can give 99.99% trust on it... Make sure its a german floor with dpc (damp proof course) BEST OF LUCK

Not true. That piles are used for large projects. The instalation of your electric pole is a form of piling and it is done by hand. Reboot your imagination.
Re: Building On Swamp, How Do I Go, Raft Or Pile? by Wiliomax: 7:08pm On Feb 19, 2016
pile z safer....
Re: Building On Swamp, How Do I Go, Raft Or Pile? by Reference(m): 7:16pm On Feb 19, 2016
Wiliomax:
pile z safer....

if done properly....and this is what I fear with most Nigerians. When the going is tough like the poster is experiencing, corners are often cut.

IF YOU CANNOT GET IT RIGHT. STEER CLEAR OF PILES.
Re: Building On Swamp, How Do I Go, Raft Or Pile? by UnimkeAk(m): 7:21pm On Feb 19, 2016
bigi4u:

Pls my dear engeneers in the house, i salute you all.

I have read some of your advices on building on waterlogged areas and i appreciate your comments, but mine is a little different and i'll need your candid advises.

Please i bought a plot of land of 60 * 120 in iyana iba area, Lagos. its a waterlogged land (for sake of cost). with a layman experience i used a long narrow stick to see if i can determine how deep to the (Bedrock) solid ground beneath, it took between about 3ft (close to shore dept) to 6ft (centre dept) to pass the softtop(debris, decaying grasses, no mud, the soil is sandy, looks like sharpsand) to get to strong ground. i've filled it to some extent with filling sand, meanwhile some building are being erected in there but some didn't get their foundation well done, which is part of what i'm trying to avoid.
Now, i'm ready to build, (atleast the FOUNDATION for now), pls like how much will it cost to lay a good durable but cost effective foundation of 2 storey building of single 4 bedroom flat, (1 flat at ground flour, 1 flat at 1st flour) (BQ sort of.) and which type of foundation will be best option, considering its various depts and the costs (cos I don't have much, just trying to escape from high lagos rents and planning for retirement.). What will it require?

Also can the foundations be done in bits, (ie, casting now and german floor much later if raft or also in piles) or must everything be done at once? Please your help is highly needed for me to know what next to do.
Many thanks from bigi.

simple carry out a site & soil analysis ; collect the architectural design from the architect and then hand over the site analysis report and architectural designs to a competent structural engineer to produce a working structural design 4 u.(of course take the engineer to the site)
.
.
so u can relax & sleep well
Re: Building On Swamp, How Do I Go, Raft Or Pile? by MyMentor: 8:03pm On Feb 19, 2016
Why do u consider pile wen u have started d filling?
I would have suggested pad (nt pile) bt since u hv started d filling, raft is d only option.
Congrate, bro!
Re: Building On Swamp, How Do I Go, Raft Or Pile? by mirakz(m): 9:21pm On Feb 19, 2016
Let's borrow the actitude of medical doctors. There is no way /where u could call a medical doctor, either friend or relative, explaining the situation of ur ill-health and expects to get a medical diagnolises. They will either tell u to come to the hospital or visit a hospital. Brother, to be candid, there is no better help u can get here than inviting a qualified engineer to ur site for a proper building/site survey and analysis.thank you.
Re: Building On Swamp, How Do I Go, Raft Or Pile? by asamaigho(m): 9:30pm On Feb 19, 2016
Reference:


24 inch casing? Those are displacement/driven piles? Haba. There are far cheaper pile systems for buildings.

ehhh, d type of soil discussed by d op was a bit scary,tho my estimation was a bit on d highside,it just to alert d op on d nature of the task ahead.
anyway there is no particular size size of pile casing to be as long as its not less dan 150mm diameter,d bigger d diameter the smaller their numbers.
i have done a design where i used a 900mm diameter precast concrete pile of abt 2500 mm length,with extra 600mm length of rbar extending floorbeam connection.

all i have said sofar is nothing more dan a rough estimation,not an empirical data.
Re: Building On Swamp, How Do I Go, Raft Or Pile? by rapu4real: 10:11pm On Feb 19, 2016
Be patient and do a soil test. That will help you save the numerous amount of money that you would spend in correcting the structure due to failure. When I say soil test, I mean a genuine soil test. Best of luck.
Re: Building On Swamp, How Do I Go, Raft Or Pile? by frank113: 1:05am On Feb 20, 2016
Use raft and don't forget to chain the foundation throughout
Re: Building On Swamp, How Do I Go, Raft Or Pile? by frank113: 1:17am On Feb 20, 2016
Use raft foundation and make sure you chain the foundation columns like normally done in the decking of a building so as to ensure uniform settlement in the sub-structure. If you need help contact this number 08060308506 and an architect
Re: Building On Swamp, How Do I Go, Raft Or Pile? by seuner: 9:46am On Feb 20, 2016
Raft foundation is good, due to the type of building you planned to build. it is also safe (provided u consult a good structural engineer) and economical compare to pile foundation. The size of the building (I.e. the length and breadth), the loadings and d structural arrangements would determine the cost of your foundation. I can't give u d accurate price, but I can do you a favour by giving u a cost breakdown of a recent foundation of a 2 storey (2 units of 4 bedroom duplex at osapa. contact me at wapadeps@gmail.com or 07062508601
Re: Building On Swamp, How Do I Go, Raft Or Pile? by ridious(m): 2:51pm On Feb 24, 2016
Reference:


Not true. That piles are used for large projects. The instalation of your electric pole is a form of piling and it is done by hand. Reboot your imagination.
you havn't educated me enough about the topic instead you recycled my opinion nd sent it back... HOW CAN I REBOOT THEN?
Re: Building On Swamp, How Do I Go, Raft Or Pile? by realomonile: 12:21am On Feb 29, 2016
A plot of land located at Akesan Lagos state Along Lasu iyana iba going for 1.5m negotiable

Direct seller...

Serious buyer should call/whatsapp 08085310359, 09054800167

Email:realomonile@gmail.com

Re: Building On Swamp, How Do I Go, Raft Or Pile? by abdulwastecx(m): 9:24am On Jun 25, 2016
femliany:
Do you need a soil text again in swampy area?no is the answer.Just get a sound structural engineer to design the number of iron rod and the type to use for you and to save cost,you can go for Raft..for granite and sharp sand,u can get in touch with me

Your comment is funny.. . How will the structural engineer design the raft or foundation without a detailed soil test?

Number of iron rod and type of aggregates to use are the result of structural analysis and design which can only be carried out after detail engineering properties of the soil have been established.

Waterlogged areas in most cases are area with expansive clay where water level rises from season to seasoned. during raining season water rises because water cannot penetration dealer and soil expand a d during dry season the soil contract because moisture is lost and water level fall.

The best solution is to following the following process.
1. Get a good Geotechnical film to do a detail soil test and tell them to suggest the type of foundation that will be structurally sound and economical, also tell them sign a written agreement that if their is a structural failure due to the type of foundation they proposed they will held accountable.

2. Take the results to a foundation engineer to design this most economical and structurally sound solutions from Geotechnical film.

3. Execute the construction given the consultancy to the structural film that did the structural design.... and you are good to go

2 Likes

Re: Building On Swamp, How Do I Go, Raft Or Pile? by dominic17: 9:00pm On Oct 31, 2021
Hello Op, how did your project go? Kindly update the house so that others can learn from your experience.
Re: Building On Swamp, How Do I Go, Raft Or Pile? by omololu251(m): 3:32pm On Nov 09, 2021
If you have any property in a swampy, consider doing soil test to determine the suitable foundation to be adopted.
Thanks


dominic17:
Hello Op, how did your project? Kindly update the house so that others can learn from your experience.

1 Like

Re: Building On Swamp, How Do I Go, Raft Or Pile? by Tayras: 12:04am On Jan 13
dominic17:
Hello Op, how did your project go? Kindly update the house so that others can learn from your experience.



How did it go? I would love to know too
Re: Building On Swamp, How Do I Go, Raft Or Pile? by omololu251(m): 10:13am On Jan 13
Consider doing soil test and after you will know the kind of foundation to go for.

In swamped area it's either raft or pile foundation.

You can contact on WhatsApp if you need any help.

08052831695



How did it go? I would love to know too[/quote]
Re: Building On Swamp, How Do I Go, Raft Or Pile? by omololu251(m): 11:30am On Jan 13
...
Tayras:




How did it go? I would love to know too

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