With the increasing volume demand of silos, squat silo diameters are bigger and bigger. However, present wallpressure computation methods are mostly based on small diameter silos. To solve this problem, systematical research onthe wall pressure in squat silos is of great importance. For now, in the Chinese code the wall pressure computationmethods are based on the limit equilibrium theory to be calculated, which define the orientation of the failure plane in thebulk solid within the silo. The rupture angle is a key parameter to silos’ wall pressure. Therefore the value and direction ofrupture angle are researched by theoretical method in this paper, which has heavy significance and provide an importantbasis for the large diameter silo design.
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