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Date of Publication:2022-10-10

Journal:计算力学学报

Affiliation of Author(s):运载工程与力学学部

Issue:5

Page Number:596-602

ISSN No.:1007-4708

Abstract:Soil and rock mixture is a special engineering geological material with the non-homogeneous , non-continuous and non-linear mechanical characteristics .In the penetration process of pile ,the rock con-tent has obvious influence on its bearing capacity .In this paper ,we use spherical particles to simulate soil material ,and irregular overlapped clumps to model the rock rubble with Discrete Element Model (DEM ) .T he bearing capacity of pile is obvious different under various rock contents .T he resistance of high rock content is much higher than that of low rock content .Moreover ,the fluctuation of resistance during the penetration process is more obvious under high rock content condition .The influence of rock content on bearing capacity of pile is discussed based on the distribution of inter-particle force chains on micro scale .It is effective to analyze the macroscopic mechanical behaviors of soil and rock mixture with discrete element method ,especially to determine its mechanical characteristics under complex engineering conditions .

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