Concrete slurry store.

An Gof

Member
Location
Cornwall
has anyone made a slurry store sunk in the ground with concrete panels?
Would normally just earth line a lagoon, but not so much space this time, so looking at concrete.

Ta

There's an underground covered and drive in store very close to Truro ;)

But the farmer had considerable experience of ground works and access to all the plant he wanted ;);)

I'm sure you can work out where :p
 

MickMoor

Member
Location
Bonsall, UK
Working on one for dirty water and Silage effluent at the moment. Panels do not have sufficient cover of the reinforcing to guarantee 20year life without maintenance, which is an EA requirement for underground tanks. Prepare VERY throughly. Trust me, the profit has disappeared on this job already. Progress on my facebook page, see below.
 

Boysground

Member
Mixed Farmer
Location
Wiltshire
I have one. it's L shaped panels and a poured concrete floor. Used a pump to get the concrete laid. ea were happy when it went in 5 years ago. had a full ea inspection on Friday and still happy.

It's 2.4m deep but some of the panels are 3.2m to get the levels right

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MickMoor

Member
Location
Bonsall, UK
I have one. it's L shaped panels and a poured concrete floor. Used a pump to get the concrete laid. ea were happy when it went in 5 years ago. had a full ea inspection on Friday and still happy.

It's 2.4m deep but some of the panels are 3.2m to get the levels right

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Yes, as you will see, we are using L shaped panels.
 

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MickMoor

Member
Location
Bonsall, UK
How are you sealing them @MickMoor ?

I'll use Sikaflex mastic. We always carry a some, and it does have a shelf life, so this will help us rotate stocks.The concrete floor will be vibrated and mechanically tamped, sowill work its way under the feet of the panels. I originally intended using 6" panels vertically, but just before ordering found I couldn't make them stand up against the thrust from the backfilling, so had to switch at my expense. I want to do one of those crying face things but don't know how.
 
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MickMoor

Member
Location
Bonsall, UK
The problem with having panels horizontally is that the steels have to support the thrust from all the backfilling. Designing a foundation is not straightforward, and with a liquid, you cannot rely on the weight of the contents to help like in a silage clamp.
 

Building Boy

New Member
Location
Devon
We build lots of slurry stores with concrete panels, this one isn't far from you, 3.6m deep 50m long by 25 m wide
 

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Morph

Member
Location
Devon
A mate put up a sectional round concrete store it is buried 3-4m deep on 2/3rds of its diameter. The manufacturers were fine with the situation.
 

MickMoor

Member
Location
Bonsall, UK
I don't fancy going to all that work and having it fail, which is why I had to revise my design. Still cheaper than a tank that failed. I quote mystructural engineer: "We need to confirm that the construction detail shown is adequate for an external loading of 3.0m soil depth (this will apply to the road end of the tank) with an additional 10kN/m2 surcharge. The tank needs to be in the empty state for the external load calculations. The EA will want toseee that hese calculations have been carried out, and you are meant to inform them before starting work.
 

MickMoor

Member
Location
Bonsall, UK
A mate put up a sectional round concrete store it is buried 3-4m deep on 2/3rds of its diameter. The manufacturers were fine with the situation.

Concrete stores have to be over-designed, or they would stretch when you fill them and leak at the joints. This aspect can be used to advantage when you construct one below ground.
 
I don't fancy going to all that work and having it fail, which is why I had to revise my design. Still cheaper than a tank that failed. I quote mystructural engineer: "We need to confirm that the construction detail shown is adequate for an external loading of 3.0m soil depth (this will apply to the road end of the tank) with an additional 10kN/m2 surcharge. The tank needs to be in the empty state for the external load calculations. The EA will want toseee that hese calculations have been carried out, and you are meant to inform them before starting work.
But a poured wall, 8inch thick back filled will surely be stronger than any precast panel.
 

Building Boy

New Member
Location
Devon
I've had a price today for the pannels, is it not cheaper to pour walls? I was thinking of going nearer 5m deep if we poured the walls, and then back fill aswell.

The haulage is killing the pannels.
Have you tried FP McCann they supply all our panels
Will supply all calculations and installation drawings
Wouldn't fancy going 5m deep the ground would need to be good and I'd definitely want a structural engineer to design a shuttered wall
 

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