Discrete element soil sample preparation method for generating homogeneous soil sample according to specified grading void ratio

Abstract

A discrete element soil sample preparation method for generating a homogeneous soil sample according to a specified grading void ratio comprises the following steps: 1, determining the number of particles, and determining the number of particles in sections according to control points of a grading curve; 2, conducting single-layer sample preparation: firstly layering samples according to height, determining the number of particles of one layer according to the specified grading and void ratio in the step 1, then generating six walls according to the sizes of two layers, and compacting the particles by moving the upper wall and the lower wall; 3, replacing the particles at the layering position: firstly, assembling the multi-layer samples determined in the step 2, in order to eliminate the layering phenomenon between layers after assembly, deleting the particles between the upper layer and the lower layer, copying the particles in the middle of the lower layer for replacement, and then running enough steps to enable the particles to move in a balanced manner; 4, applying gravity and friction force: after the samples with the required size are obtained in the step 3, finally applying the gravity and the friction force, and running for enough steps to settle and consolidate a soil body under the action of the gravity. According to the method, a homogeneous discrete element soil sample can be rapidly prepared according to the specified grading and void ratio, the calculation efficiency is high, and a real soil body condition can be well simulated.

Description

technical field [0001] The invention relates to the technical field of discrete element numerical simulation of rock and soil, in particular to a discrete element soil sample preparation method for generating homogeneous soil samples according to specified gradation porosity. Background technique [0002] Soil is a kind of bulk material in reality, and discrete element can simulate bulk material very well, so discrete element has been widely used in geotechnical engineering research. The discrete element modeling process has a great influence on the results of discrete element numerical simulation, and the preparation of soil samples is particularly important as the first step of discrete element modeling. For the preparation of initial soil samples, the main methods are radius expansion method, layered compaction method, and one-time generation method. Although these methods can produce relatively uniform soil samples, they all have their own defects. The porosity and soil...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a method for generating homogeneous soil samples according to the specified gradation porosity, aiming at the problems that the gradation and porosity of the soil samples prepared in the discrete element modeling process cannot meet the requirements and the calculation efficiency of the uneven particle distribution is low. Discrete Element Soil Sample Preparation Method for Soil Samples

Images