Abstract:As a new type of granary, the semi-underground double-layer squat silo has the advantages of saving space and energy, a high degree of mechanization, and ensuring the quality of grain storage. Herein, solid elements were used to establish numerical models, set boundary conditions according to the geological conditions and actual state of the site, and construct a numerical-analysis method for semi-underground double-layer squat silos. The feasibility of the numerical simulation method was verified by comparison with physical test results of the underground granary. Analysis of the mechanical performance before and after backfilling during the construction of the semi-underground double-layer squat silo showed that the radial and hoop stresses of the bottom of the silo reached a peak at two-thirds of the conical base before backfilling, and the maximum radial and hoop stresses of the first layer of the silo wall reached a peak at one-third of the conical base after backfilling. This study provides theoretical support for the engineering design and construction of semi-underground double-layer squat silos.
