| 曾 晋.土石混合体分形几何特征与强度演化特征[J].地质与勘探,2020,56(3):590-596 |
| 土石混合体分形几何特征与强度演化特征 |
| Fractal geometry and strength variation of earth-rock aggregate |
| 投稿时间：2019-04-25 修订日期：2020-03-01 |
| DOI：10.12134/j.dzykt.2020.03.011 |
| 中文关键词: 土石混合体 含石量 分形几何 分形维数指标 |
| 英文关键词: earth-rock aggregate, stone content, fractal geometry, fractal dimension |
| 基金项目:四川省教育厅科研基金（编号：18ZB0084）和成都理工大学工程技术学院科研基金（编号：C122017011）联合资助 |
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| 中文摘要: |
| 针对土石混合体的结构性特点，以含石量为20%、30%、40%、50%、60%的土石混合体为研究对象，基于多重分形原理研究多重分形特征，研究分形维数与强度之间的关系. 研究表明, 土石混合体具有双重分形特征，不同尺度条件下具有不同分形指标，包括块石粒度、土体粒度以及平均粒度等分形维数，与含石量相关。 单轴压缩试验表明，抗压强度随含石量增加呈现先增大后减小的趋势，根据单维分形特征，确定最优含石量约为40%。 建立了含石量、不同分形维数指标与抗压强度之间的关系，分析了双重因素综合影响下抗压强度的变化特征，确定了含石量与分形维数之间存在最优区域。 |
| 英文摘要: |
| According to the structural characteristics, this work studies the soil-rock mixture with 20%, 30%, 40%, 50% and 60% stone content. Based on the multifractal principle, the fractal characteristics and their relation to strength variation are analyzed. Research suggests that the soil-rock mixture is characterized by double fractal geometry and the fractal indexes depend on different scales, including stone size, soil particle size and average particle size. The uniaxial compression tests show that the compressive strength increases first and then decreases with the increase of the stone content. According to the single-dimensional fractal characteristics, the optimal rock content is about 40%. The relationships between stone content, different fractal dimension indexes and compressive strength are established. The variation characteristics of compressive strength under the combined influence of dual factors are analyzed. It is determined that there is an optimal region between the stone content and the fractal dimension. |
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