₦airaland Forum

diordaves:
I don't know much about Mowe but it seems Mowe is a difficult terrain. Why is that? Do you know? At least with the geological survey you've done has taken the lottery hit and miss out of the equation.

With the survey, water contractors are sincere and honest with you: no I can't do it because of overburden. Way better than fly by night pretenders who will collect money only to turn round for site and then disappear with the advance payment.

Though sedimentary drilling is the most technical, mowe-ofada axis is not that stubborn. Once you don't jeopardise with the right team, right tools, right Casing thickness then the job is a success.

The image attached is one of the rig we used in ofada, you can see its totally different from the Indian rigs. The Indian rigs are majorly created for basement drillings (they love breaking igneous/metamorphic rocks) and once the overburden is much, they won't be able to do the job.

folmus:
How did you arrive at this conclusion? You didn't enlighten us. Mowe-Ofada

Mowe-ofada is a pure sedimentary terrain. The sedimentary rock units are clay, shale and sandstone in which the sandstone is the aquifer. The minor aquifer is mostly at 40m (this can only be tapped by the manual drillers, the major aquifer is at 80m ( you need a motorised rig to tap the aquifer here)



The report was mentioning overburden thickness and this pertains only to basement/ transition zones. The overburden is the load of sedimentary rock (sand, clay etc) units overlying a basement rock.

folmus:
Folks!!

I need a recommendation on borehole drilling.

The results of the geophysical survey recommend 80m with an overburden of 50m.

I have contacted few companies in Ibadan including the one used by @diordaves but they cannot do it because of the overburden.


Location is Mowe.

Don't worry I will do my.......................

If your site is at mowe, then you should check your Geophysical Survey report. Most likely your report is misleading.

michlins:
I just looked at this from another angle. Rubber tanks can actually hold it. Say we do four(4) one thousand gallons. Just like below

Am thinking on something good and economical, because steel tank of 20,000 litres will be so so expensive.

michlins:
to make an estimate, I need to know the height which you will want the tank stand to be.

For it to be simple, what's the height of the tallest building in the estate

Can't really say, the tallest is a story building with a basement. That should be more than 20ft

michlins:
for a 20,000 liters, it's best to do steel tank. That's the only way the water pressure will remain constant same until the last drop of water.

Oh, please try to make a rough estimate

michlins:
two(2) 1000 gallons at the top and one (1) 500 gallons at the middle. Making a total of two thousand five (2,500) gallons. It's customizable to fit your specific water needs.

The materials are:

6 by 3 H beam channel(stands and load beams)

4 by 2 H channel (for the poline)

6 by 3 plates for the guzzets

2" angle iron for the diagonals

12 by 12 by 10mm for the base plates

Can you design something for a commercial estate of 20 flats. We are looking at about 15,000 to 20,000 litres of water. Also let's compare steel tanks to using rubber tanks. Thanks

michlins:
so yes, after building your expensive house, you don't ruin it. You make it beautiful all round including the tank stand

What's the volume of the tanks here?

What's the process of making this?

But he suppose be a billionaire na, why so wretched

But he suppose be a billionaire na, why so wretched

KolaShangOne:
Like my Abeokuta site..

Seriously.

dapotemi:
Can you please share contact? I was yokd yhey are better than all this local.. We have alot of them in ABUJA but i never see anyone in lagos and i need to do a borehole very very soon

Indians rigs have limitations, they might nt work well in a weak terrain. Depending on their configurations anyway

Dennis3D:
I did shallow borehole in Lekki for less that amount sef. So different terrain for different reasons for the varying cost.

Always refer to geological survey, if you doubt the competency of your borehole driller.

In the case of Enugu. The geological survey has it at 200 - 210meters that we will see water.

And guess what, we saw water at exactly 200m.

The whole details is on the thread.

Is the shallow at Lekki free of salt?

Beautiful lies

n3xt:
A 21 floor building on Gerrard road should have nothing less than 40 - 50m deep pile.

I’ll start from the company that did the pile. Did they actually achieve the recommended depth?

Those who know knows.

After then you can move to the PIT guys, did they actually carried out the test?

KolaShangOne:
See what happened after just one rainfall...

And I got it 10,000 per carton in Ibadan instead of about 8,000 in Lagos..

Money lost.

I think it's supposed to be polished after installation.

Adedward:
Just delivered from here NL members here contact us for ur own casement windows with 5mm grey glass and embedded with burglaries contain 12mm on it,

Good job. You can try to increase your rod standard from 8mm because It se ems today's 8mm is yesterday's 6mm

topsy23:
Good evening house, I have been offline since Friday but that thank God am back.

I was robbed on Otedola bridge heading to secretariat on Oct 1st by some Bad boys around 7,30pm.

They collected everything including my ATM. But thank I quickly called my account officer to block my account.

It was a terrible situation anyway

Sorry bro, thank God for safety.

bolu1986:
Ibadan people well done o… they came to site and made away with 19 bags of pop cement.. funny enough they sold it to the place we bought from… lol

Let them cool off in the cell for a while

Am glad we were able to retrieve the items back

Wow, interesting

Hello

Hello

Hello

n3xt:
Got an offline msg that I should shed more light on subsoil investigation and the importance.

______

We’ve actually done this many times here but I’d share something from the Test we carried out in 2011.

_______

No matter the size of your house, it is highly advisable to investigate the compaction characteristics of the soil you want to build on as this will tell you if the soil is a satisfactory foundation material.

Soil test is not just a means of enriching engineers/builders/town planners but a scientific way of confirming the suitability of soil for a proposed development.

_________

A soil might be satisfactory for one type of construction but might require special treatment for other building. The test will confirm the suitability of soils for foundation based on strength, cohesion and consolidation characteristics of the soil.

Most people would ve completed building, neglecting the bearing capacity of the soil before carrying out geo-technics. They do this for cover ups, maybe for approval purposes or its on demand.

Some engineers don't even open up fully to the geologist/ geotechnical engineers on the scope of the building, a bid to reduce cost for the investigation and this will definitely reduce the scope of work to be carried out.

These are major issues in Lagos which every builders need to look into in other to reduce settlement or collapse.

How much is pencil camry engine?

Advanced Integrated Geophysical Investigation

dapotemi:
Which part of Nig is this? What do u mean by overburden?

That's southwestern Nigeria, Osun State. The overburden is the layer overlying the basement (granitic) rock

micgray100:
Motorize Bore hole diggers in the house... see jobs ooooo... give use price per meter of feets..

Geotech survey is very important too...

in Abuja... there are some Indian bore hole guys... they just ask you where you want the bore hole in your compound..
there price is fixed with casement... it ranges between 6k to 7k per meter.. they don't want to know if rock is inside or not.. they just dig...

Hoping to meet such guys in the south west

We have Indian rigs here in the sW. Most are adapted for basement(granitic) drillings and the works are completed within few hours.

The rotary rigs are specialised for sedimentary drillings, there timeline for a job is around 1-3days or more depending on the scope and formation. They usually charge on a lump sum... Around 500k to millions. Manual drilling which is cheaper can work in its place in most case.