The four largest LPG storage tanks in the world (each 5,650 tonnes, 60m long, 16m diameter and buried in a mound) were founded on one enormous piled raft whose differential settlement needed to be minimal since the tanks could not withstand distortion.
A 3D FEA model of the tanks, mound and piled raft was created, validated by pile load tests performed on site. Individual pile lengths were carefully adjusted to achieve near-uniform settlement.
FEA back-analysis of pile load tests undertaken on site.
Creation of 3D FEA model of the tanks, mound, piled raft and supporting soil.
Simulation of construction, tank hydrotesting and operation.
Optimisation of individual pile lengths to create a near-uniform settlement of the raft.
Distortion of the LPG tanks minimised for their safe operation.