Gravelly soil layer discrete element simulation method considering particle shape randomness

Abstract

The invention relates to a gravelly soil layer discrete element simulation method considering particle shape randomness. The method comprises the steps of S1: generating a gravelly soil grading curve;S2: establishing a shape library of normalized random convex polygons; S3: obtaining disk filling representations of the polygons in the shape library by adopting a medial axis transformation-based disk filling coverage method; S4: randomly generating convex polygon particles different in size based on the grading curve through the disk filling representations of the polygons according to the shape library; S5: generating small-diameter particles to fill the convex polygon particles; and S6: adding a gravity field for enabling a whole system to be balanced, and finishing the building of a model. Compared with the prior art, the method is used for simulating rock-soil aggregate strata, so that the engineering problems of constitutive relations of rock-soil aggregates, destruction forms, foundation pit excavation, slope stabilization, tunneling and the like can be conveniently researched.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a discrete element simulation method for gravel soil layer considering the randomness of particle shape. Background technique [0002] In geotechnical engineering, gravel soil is a kind of special rock-soil medium. Compared with the traditional soft clay or sandy soil, the particle strength in the gravel soil layer is high, but there is almost no cohesion between the particles, and the difference in particle size is large, so the physical and mechanical properties displayed are more complex. With the development of tunnel construction in China, the transportation network has been continuously improved and extended. In the tunnel construction in recent years, the engineering problems of shield tunnels in gravel soil layers have gradually attracted the attention of experts and scholars. [0003] At present, scholars at home and abroad have done a lot of experimental research from ...

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Problems solved by technology

In the early discrete element research on soil-rock mixture, only the influence of rock content was considered, and the gradation was only simple gradation (linear uniform distribution of particle size). In addition, the geometric shape of crushed stone was not considered, and random Generate convex polygonal gravel

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