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Soil pressure on burried vessel

Soil pressure on burried vessel

Soil pressure on burried vessel

(OP)
How to calculate the soil pressure on burried vessel if soil density is known, burrial depth is known. Burrial depth is 5 feet, vessel OD is 10 feet, would soil pressure be product of (burrial depth plus OD), Value of g and soil density?

Nasir
Welding Engineer
DESCON ENGINEERING LIMITED
PAKISTAN

RE: Soil pressure on burried vessel

be carful when designing burried vessel. You do not want your vessel to shift or float away during raining or flooding.
You shall use the maximum g from (water, dry soil, wet soil) to determine the external pressure=static head, just like a submarine. Then you shall calculate the buoyant force (uplift force) to design your anchor system.

External pressure psi = 0.433 x height in ft x density in "g". Use the height to the bottom of the shell.
uplift force Lbs= vessel volume in cubic ft x 62.4, and consider vessel in empty case so not much downward weight to compensate the uplift force.
Some people use strap to hold the vessel down. I still design as a regular drum with saddles and anchor bolts, and sit on two burried concrete piers, simple and easy. Just watch out to double your corrosion allowance.

RE: Soil pressure on burried vessel

EEMUA 190 gives a detailed procedure

RE: Soil pressure on burried vessel

(OP)
Thanks for all of you for your really valued comments.
I have used UL-58 to calculate the buckling pressure.
the value of g I shall take from the soil study report.

Nasir
Welding Engineer
DESCON ENGINEERING LIMITED
PAKISTAN

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