| 脏污材质对散体道床剪切力学性能影响的试验研究 |
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| 引用本文： | 高亮,徐旸,殷浩.脏污材质对散体道床剪切力学性能影响的试验研究[J].北京交通大学学报(自然科学版),2017,41(1). |
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| 作者姓名： | 高亮 徐旸 殷浩 |
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| 作者单位： | 北京交通大学土木建筑工程学院,北京100044;北京交通大学轨道工程北京市重点实验室,北京100044;北京交通大学土木建筑工程学院,北京100044;北京交通大学轨道工程北京市重点实验室,北京100044;北京交通大学土木建筑工程学院,北京100044;北京交通大学轨道工程北京市重点实验室,北京100044 |
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| 基金项目： | 国家自然科学基金重点项目，国家自然科学基金面上项目，中央高校基本科研业务费，北京市科技新星计划(XX2013012)National Natural Science Foundation of China，Fundamental Research Funds for the Central Universities，Beijing Nova Program |
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| 摘 要： | 道床脏污会影响道床的剪切力学特性.为揭示脏污材质对道床剪切力学性能的影响规律,通过自主研发的大型铁路碎石道砟直剪仪,对道砟集料进行直剪试验.分析了不同道床脏污材质及脏污程度对道床平均剪应力、最大剪应力和最大剪胀位移等参数的影响.研究结果表明,煤灰和黄沙所构成的道床脏污均会使散体道床剪切力学性能显著降低;煤灰脏污对散体道床剪切力学性能的削弱作用比黄沙脏污更明显.
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| 关 键 词： | 散体道床 道床脏污 直剪试验 力学性能 |
Experiment research of shear behavior of railway ballast influenced by different fouling materials |
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| GAO Liang,XU Yang,YIN Hao.Experiment research of shear behavior of railway ballast influenced by different fouling materials[J].JOURNAL OF BEIJING JIAOTONG UNIVERSITY,2017,41(1). |
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| Authors: | GAO Liang XU Yang YIN Hao |
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| Abstract: | Ballast fouling will affect the shear behavior of ballast bed.In order to reveal the influencing regularity of fouling materials on the shear behavior of railway ballast,a large scale direct shear apparatus dedicated for railway ballast was developed,and direct shear tests were conducted to study the effects of different ballast fouling materials and different ballast fouling ratios on average shearing stress,the maximum shearing stress and the maximum shear dilatation displacement of ballast.The results show that both the coal ash fouled ballast and the sand fouled ballast result in poor shear mechanical characteristics of ballast bed.And the effects of coal ash is larger than sand in terms of reducing the shear behavior of ballast bed. |
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| Keywords: | ballast bed ballast fouling direct shear test mechanical characteristic |
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