tank foundation
tank foundation
(OP)
Hello,
I am dealing with foundation of a large oil tanks. Could somebody give me a little piece of advice regarding ring wall foundation for tanks? Ring wall should supported loads from shell and roof and prevent lateral displacements? So it transmit loads from construction to grade only? What is the advantage of ring wall type of foundation? How to prevent distortion from differential displacements of subgrade?
Regards
I am dealing with foundation of a large oil tanks. Could somebody give me a little piece of advice regarding ring wall foundation for tanks? Ring wall should supported loads from shell and roof and prevent lateral displacements? So it transmit loads from construction to grade only? What is the advantage of ring wall type of foundation? How to prevent distortion from differential displacements of subgrade?
Regards





RE: tank foundation
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RE: tank foundation
RE: tank foundation
RE: tank foundation
I'm interested in the soft soil sites you've mentioned. Have you got any (or know of any) relatively detailed case histories for the sites with large tanks on soft soils, particularly those with settlement monitoring, or pore pressure monitoring during loading?
RE: tank foundation
RE: tank foundation
at this particular site, I am involved in computation of settlements. It is a tank field. Four of them already exist without any problems or danger. Another two are under construct now. Contractor wants to put tanks on asphalt- concrete pad. More, he wants to put concrete ring wall adjacent (outside) steel shell to prevent lateral deformation.
Diameter is 50 m, volume 125.000 cubic m. Profile consist of fills (up to 3m, in the past it was a site of gravel/sand pit) then 2 m of sand and gravel, and then marl rocks. Fills are unsuitable for foundation purposes, so it were excavated and changed by more suitable fills. Marl rocks are highly weathered from the top.
I performed computation and the output are: about 15 cm of settlements around the center of the tank. (limits are 10 cm, so ups..I am in trouble) Settlements under the shell are smaller.
It is sound ok or not?
Thanks a lot for discussion.
RE: tank foundation
I am a bit surprised that the previous fill material was replaced before the settlements were computed and an appropriate foundation material/geometry could be selected.
Jeff
RE: tank foundation
from the in-situ test we obtain low value of deformation of fills, so it was better to replaced local materials by more suitable.
RE: tank foundation