| 隧道爆破力学模型相似材料配比的正交试验 |
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| 引用本文： | 宫嘉辰,陈士海. 隧道爆破力学模型相似材料配比的正交试验[J]. 华侨大学学报(自然科学版), 2020, 41(2): 164-170. DOI: 10.11830/ISSN.1000-5013.201910035 |
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| 作者姓名： | 宫嘉辰 陈士海 |
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| 作者单位： | 1. 华侨大学 土木工程学院, 福建 厦门 361021;2. 华侨大学 福建省隧道与城市地下空间工程技术研究中心, 福建 厦门 361021 |
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| 基金项目： | 国家自然科学基金;研究生科研创新项目 |
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| 摘 要： | 以砂岩作为模拟对象,研究满足隧道爆破力学模型试验要求的相似材料配比问题.基于正交试验法,选取石英砂、重晶石粉、石膏、水泥和水为相似材料,设置以石英砂/固体、水泥/石膏、重晶石粉/(重晶石粉+石英砂)的质量比为3个因素,每个因素3个水平,共9组配比的正交试验方案.通过室内试验,得到相似材料的密度、单轴抗压强度、弹性模量和声波波速的实测数据.试验结果表明:相似材料的物理力学参数分布范围较广,可满足不同隧道模型试验对相似材料的配比要求.利用极差敏感分析法分析各因素对相似材料参数的敏感性,并通过各因素对相似材料参数影响的直观分析图,分析各因素对相似材料物理力学参数的影响规律.对试验数据进行多元线性回归分析和室内试验,发现最优配合比下的相似材料与原型砂岩的单轴应力-应变曲线具有相似的脆性破坏特征;相似材料物理力学参数的设计值和实测值误差较小.
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| 关 键 词： | 砂岩 隧道爆破力学模型 相似材料 正交试验法 极差敏感分析法 直观分析图 多元线性回归分析 最优配合比 |
Orthogonal Test of Similar Materials Ratio in Tunnel Blasting Mechanical Model |
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| GONG Jiachen1,CHEN Shihai1,' target="_blank" rel="external">2. Orthogonal Test of Similar Materials Ratio in Tunnel Blasting Mechanical Model[J]. Journal of Huaqiao University(Natural Science), 2020, 41(2): 164-170. DOI: 10.11830/ISSN.1000-5013.201910035 |
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| Authors: | GONG Jiachen1,CHEN Shihai1,' target=" _blank" rel=" external" >2 |
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| Affiliation: | 1. College of Civil Engineering, Huaqiao University, Xiamen 361021, China; 2. Fujian Research Center for Tunneling and Urban Underground Space Engineering, Huaqiao University, Xiamen 361021, China |
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| Abstract: | Sandstone was used as the simulation object to study the ratio of similar materials that met the requirements of the tunnel blasting mechanical model test. Based on the orthogonal test method, quartz sand, barite powder, gypsum, cement, and water were selected as similar materials, and the mass ratio of quartz sand/solid, cement/gypsum, barite powder/(barite powder+quartz sand)were set as 3 factors, 3 levels of each factor, a total of 9 groups of orthogonal test schemes. Through laboratory tests, the data of density, uniaxial compressive strength, elastic modulus, and acoustic wave velocity of similar materials were measured. The test results show that the distribution range of physical and mechanical parameters of similar materials is wide, which can meet the requirements for the ratio of similar materials in different tunnel model tests. The sensitivity of each factor to similar material parameters is analyzed using range sensitivity analysis, and the in-fluence of each factor on the physical and mechanical parameters of similar materials is analyzed through the visual analysis of the influence of each factor on the similar material parameters. Multivariate linear regression analysis and laboratory tests were performed on the test data. It is found that the uniaxial stress-strain curves of similar materials at optimal mix ratios and prototype sandstone has similar brittle failure characteristics. The difference between design and measure values of the physical and mechanical parameters of the material is small. |
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| Keywords: | sandstone tunnel blasting mechanical model similar materials orthogonal test method range sensitivity analysis method visual analysis chart multiple linear regression analysis optimal mix ratio |
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