| 基于3D雕刻技术的岩体结构面剪切各向异性研究 |
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| 引用本文： | 周辉,程广坦,朱勇,张春生,卢景景,张传庆,章颖辉.基于3D雕刻技术的岩体结构面剪切各向异性研究[J].岩土力学,2019,40(1):118-126. |
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| 作者姓名： | 周辉 程广坦 朱勇 张春生 卢景景 张传庆 章颖辉 |
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| 作者单位： | 1. 中国科学院武汉岩土力学研究所 岩土力学与工程国家重点试验室，湖北 武汉 430071；
2. 中国科学院大学，北京 100049；3. 山东农业大学 水利土木工程学院，山东 泰安 271018；4. 中国电建集团华东勘测设计研究院有限公司，
浙江 杭州 310014；5. 东华理工大学 水资源与环境工程学院，江西 南昌 330013 |
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| 基金项目： | 国家重点基础研究发展计划（973）项目(No. 2014CB046902)；国家自然科学基金项目(No. 51427803，No. 51404240，No. 51709257) |
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| 摘 要： | 相同形貌结构面重复性剪切试验和各向异性剪切试验一直是岩体结构面剪切力学特性试验研究中的难点，而该问题对于工程岩体的开挖力学响应和稳定性分析、评价与控制至关重要，问题的关键在于同一种岩石的结构面形貌的再现。为此，基于3D扫描和3D雕刻技术，重复制备了3种不同粗糙度的大理岩结构面试样，开展了不同法向应力下相同形貌结构面的各向异性剪切试验。试验结果发现：（1）同一法向应力、不同剪切方向下，相同形貌结构面的剪切强度、剪胀和剪切破坏特征均呈现明显各向异性；（2）结构面粗糙度各向异性很大程度上决定了剪切强度的各向异性，两者具有较好的正相关性；（3）随着法向应力的升高，结构面剪切特征的各向异性有逐渐弱化的趋势。同时，研究还充分表明，3D雕刻技术是系统开展结构面剪切力学特征各向异性研究的可靠手段，可在将来研究中发挥更为重要的作用。
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| 关 键 词： | 结构面形貌 3D雕刻 粗糙度 3D扫描 各向异性 |
| 收稿时间： | 2018-01-13 |
Anisotropy of shear characteristics of rock joint based on 3D carving technique |
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| ZHOU Hui,CHENG Guang-tan,ZHU Yong,ZHANG Chun-sheng.Anisotropy of shear characteristics of rock joint based on 3D carving technique[J].Rock and Soil Mechanics,2019,40(1):118-126. |
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| Authors: | ZHOU Hui CHENG Guang-tan ZHU Yong ZHANG Chun-sheng |
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| Abstract: | The repetitive shear test and anisotropic shear test of structural planes with the same morphology have always been challenging in the experimental study of shear mechanical properties of rock mass which are of significance to the mechanical response during excavation and stability analysis, evaluation and control of engineering rock masses. The key to this challenge is to reproduce the structural plane topography for the same type of rock. Based on 3D scanning and 3D carving techniques, a large number of marble structural plane samples with three different roughness are reproduced. To investigate the anisotropy of shear characteristics, direct shear tests are conducted on marble joint samples with same surface morphology under different normal stress conditions. The results show that under the same normal stress but different shear directions, the shear strengths, dilation characteristics and shear failure characteristics of marble joint samples with the same surface morphology are obvious anisotropic. The anisotropy of shear strength is largely dependent on the anisotropy of joint roughness. With increasing normal stress, the anisotropy of shear mechanical characteristics of rock joint gradually decreases. The 3D carving technique is a good method to investigate the anisotropy of shear characteristics of natural rock joints and can play an important role in further study of this problem. |
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| Keywords: | rock joint morphology 3D carving roughness 3D scanning anisotropy |
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