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| 基于正交设计的软岩相似材料配比试验研究 |
| Experimental Study on Similar Material Ratio of Soft Rock Based on Orthogonal Design |
| 投稿时间：2024-06-20 修订日期：2025-01-07 |
| DOI： |
| 中文关键词: 相似材料配比 正交试验 软岩 敏感性分析 |
| 英文关键词:similar material ratio orthogonal test soft rock sensitivity analysis |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 中文摘要: |
| 为了能够选择合理的软岩相似材料配比以确保模型试验结果的可靠,考虑软岩强度低、亲水性强,在地震降雨等外部荷载作用下易导致滑坡形成的特性,在传统相似材料的基础上加入膨润土模拟软岩亲水特性,基于三因素四水平的正交设计开展了相似材料配比试验,对16组不同配合比的试样进行了密度、抗压强度、弹性模量、黏聚力和内摩擦角5项物理力学性能指标测试,通过极差和方差分析法对上述物理力学参数进行了敏感性分析。研究结果显示：不同配合比的相似材料物理力学参数分布范围广,能够基本满足滑坡模型试验对软岩相似材料的需求；相似材料密度对膨润土掺量和甘油含量的敏感程度高,抗压强度和弹性模量都受到甘油含量的显著影响,黏聚力随甘油含量和膨润土掺量的改变发生明显的变化,内摩擦角随甘油含量增加而减小,随骨胶比增大呈现先增大后减小趋势。研究结果可为滑坡模型试验中的软岩相似材料配比提供参考。 |
| 英文摘要: |
| In order to select a reasonable ratio of soft rock similar materials to ensure the reliability of the model test results, considering the characteristics of low strength and strong hydrophilicity of soft rock, which is easy to cause landslide formation under external loads such as earthquake and rainfall, bentonite is added to simulate the hydrophilic characteristics of soft rock on the basis of traditional similar materials. The orthogonal test design of three factors and four levels was used to carry out the similar material ratio test. In 16 groups of samples with different ratios, the five physical and mechanical parameters of density, cohesion, internal friction angle, compressive strength and elastic modulus were tested. The sensitivity analysis of the above physical and mechanical parameters was carried out by range and variance analysis. The results of the data analysis indicate that the soft rock similar materials with different mixing ratios have a wide range of distribution of physico-mechanical parameters, which can basically meet the demand for soft rock similar materials in soft rock landslide model tests. The sensitivity of the density of similar materials to bentonite dosing and glycerol content is comparably high. The compressive strength and elastic modulus are significantly affected by glycerol content. The cohesion changes significantly with the change of glycerol content and bentonite content. The internal friction angle decreased with the increase of glycerol content, and tends to increase and then decrease with increasing bone glue ratio. The results of this study can provide a reference for soft rock similar material ratio in landslide modelling tests. |
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