Capacity of Permanent Caisson Foundation

• Jul 1, 2016

• #2

EireChch

Geotechnical

Jul 25, 2012

1,359

IE

10m dia? Surely a mistake?

my apologies, I thought caisson referred to a bored pile and I havnt seen a bored pile 10m in dia.

Anywasy - more to the point, i agree, what are you building ?

 

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• Jul 1, 2016

• #3

BUGGAR

Structural

Mar 14, 2014

1,732

US

We did some 40 ft x 60 ft floating concrete caissons so why not 10m?

My opinion must first be fed by my curiosity. What are you building?

 

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• Jul 1, 2016

• Thread starter
• #4

Kpaudel

Geotechnical

Oct 3, 2012

47

NP

Dear EireChch,

Yes it's 10 m dia well/caisson for bridge foundation.

This one is reference for you

https://en.m.wikipedia.org/wiki/Caisson_(engineering)

Yes Buggar we are going to construct bridge.

 

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• Jul 1, 2016

• #5

oldestguy

Geotechnical

Jun 6, 2006

5,183

US

I'd look more at figuring expected settlement as controlling design.

 

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• Jul 2, 2016

• #6

LRJ

Civil/Environmental

Feb 28, 2016

269

GB

Agreed that settlement is likely to dominate design. Scour is likely to be a further issue.

 

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• Jul 2, 2016

• #7

hokie66

Structural

Jul 19, 2006

23,517

AU

850 kPa is a lot of load on sand. But I agree with others that settlement is what matters. What do you know about how far down the sand layer goes, and what is underneath? When you say 850 with a FS of 3, do you mean 850 is the service load bearing pressure?

 

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• Jul 2, 2016

• #8

BUGGAR

Structural

Mar 14, 2014

1,732

US

Are you excavating overburden soils for the caisson? Caisson details? Yours is large enough that it is likely cellular. Will the cells be weighted? Sounds very interesting but very vague.

 

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