| 基于3D打印技术的岩体结构面各向异性剪切力学行为 |
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| 引用本文： | 胥勋辉,张国彪,包含,晏长根.基于3D打印技术的岩体结构面各向异性剪切力学行为[J].煤田地质与勘探,2020,48(1):154-159,167. |
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| 作者姓名： | 胥勋辉 张国彪 包含 晏长根 |
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| 作者单位： | 长安大学公路学院,陕西 西安 710054;陕西省土地工程建设集团,陕西 西安 710075 |
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| 基金项目： | 国家自然科学基金项目(41790443,41807246);陕西省自然科学基础研究计划项目(2018JQ4017)。 |
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| 摘 要： | 结构面形貌特征是影响结构面剪切行为的重要因素，而且结构面形貌特征的各向异性与其剪切力学行为的各向异性之间存在一定的联系。利用三维激光扫描和3D打印技术模拟了天然结构面，并以水泥砂浆为材料浇筑了尺寸为100 mm×100 mm×150 mm的含结构面试样，开展了不同法向应力下沿不同方向的剪切试验。结果表明，结构面的剪切行为具有明显的各向异性，这种特性可以体现在峰值剪切强度及相应的剪切位移和抗剪强度参数上；在低法向应力条件下，峰值剪切强度各向异性的强弱程度与法向应力之间并非呈现简单的单调变化关系；抗剪强度参数c（黏聚力）、f（内摩擦角）值沿不同剪切方向的变化趋势总体上较相似；通过分析不同剪切方向上c、f值相对于0°方向的差异程度，可以发现剪切方向对c值的影响更为强烈。移动阅读
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| 关 键 词： | 结构面 三维激光扫描 3D打印 剪切强度 抗剪强度参数 各向异性 |
| 收稿时间： | 2019-03-20 |
Anisotropic shear behavior of rock joint based on 3D printing technology |
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| XU Xunhui,ZHANG Guobiao,BAO Han,YAN Changgen.Anisotropic shear behavior of rock joint based on 3D printing technology[J].Coal Geology & Exploration,2020,48(1):154-159,167. |
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| Authors: | XU Xunhui ZHANG Guobiao BAO Han YAN Changgen |
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| Institution: | (School of Highway,Chang’an University,Xi’an 710054,China;Shaanxi Provincial Land Engineering Construction Group,Xi’an 710075,China) |
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| Abstract: | Topography is an important factor affecting the shear behavior of joint. Furthermore, there are certain connections between the anisotropy of topography and the anisotropy of shear behavior. In this study, 3D laser scanning technology and 3D printing technology were used to make molds for simulating the topography of natural joint. Then, the cement mortar samples with dimension of 100 mm×100 mm×150 mm were cast, and shear tests with different shear directions under different normal stresses were conducted. The results indicate that obvious anisotropy has been shown in the joint shear behavior, which is reflected in the peak shear strength and the corresponding shear displacement and shear strength parameters, respectively. In addition, the anisotropy of the peak shear strength do not present simple monotone to the normal stress under low normal stress. The shear strength parameters c and ? with different directions both show significant anisotropy, and the values of them have similar variation tendency. What's more, the results also indicate that the shear direction has a stronger influence on the cohesion by analyzing the discrepancy of cohesion and internal friction angle compared to 0°. |
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| Keywords: | joint 3D laser scanning 3D printing shear strength shear strength parameter anisotropy |
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