todh
Structural
- May 24, 2005
- 26
I am in need of some good reference recommendations.
My project consists of a 10-foot diameter by 29-foot deep concrete caisson. (To avoid confusion, this is not a drilled pier caisson, but is the kind where it is essentially a pipe installed vertically.) The soil is stiff clay with a sand lense 5 feet below the bottom of the excavation. Another sunk caisson exists on the same site adjacent to where this new one is planned, but not close enough to effect it. I have calculated the pressures on the caisson for the various loading conditions and need help in the concrete design. The caisson will house a steel pressure vessel below ground, so it should not be full of water unless the pressure vessel leaks. The main loading is compressive forces due to lateral earth and water table pressures.
I tried applying PCA's Circular Concrete Tanks without Prestressing criteria, but it is geared toward large diameter tanks in relation to height. Also, ACI 350 seems like it would be too restrictive since that would be for water tight structures from the inside.
I am in need of guidance on design of hoop reinforcement and wall thicknesses.
Thanks in advance for any recommendations.
My project consists of a 10-foot diameter by 29-foot deep concrete caisson. (To avoid confusion, this is not a drilled pier caisson, but is the kind where it is essentially a pipe installed vertically.) The soil is stiff clay with a sand lense 5 feet below the bottom of the excavation. Another sunk caisson exists on the same site adjacent to where this new one is planned, but not close enough to effect it. I have calculated the pressures on the caisson for the various loading conditions and need help in the concrete design. The caisson will house a steel pressure vessel below ground, so it should not be full of water unless the pressure vessel leaks. The main loading is compressive forces due to lateral earth and water table pressures.
I tried applying PCA's Circular Concrete Tanks without Prestressing criteria, but it is geared toward large diameter tanks in relation to height. Also, ACI 350 seems like it would be too restrictive since that would be for water tight structures from the inside.
I am in need of guidance on design of hoop reinforcement and wall thicknesses.
Thanks in advance for any recommendations.
