级配对煤矸石路基填料压实与强度特性的影响试验研究

张宗堂,  高文华,  刘昌平,  刘泽,  冯锡祥

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文章导航 > 工程地质学报  > 2023 >  31(5): 1774-1781
张宗堂, 高文华, 刘昌平, 等. 2023. 级配对煤矸石路基填料压实与强度特性的影响试验研究[J]. 工程地质学报, 31 (5):1774-1781. doi: 10.13544/j.cnki.jeg.2021-0564
引用本文: 张宗堂, 高文华, 刘昌平, 等. 2023. 级配对煤矸石路基填料压实与强度特性的影响试验研究[J]. 工程地质学报, 31 (5):1774-1781. doi: 10.13544/j.cnki.jeg.2021-0564
shu
Zhang Zongtang, Gao Wenhua, Liu Changping, et al. 2023. Experimental study of gradation effect on compaction and strength characteristics of coal gangue subgrade filler[J]. Journal of Engineering Geology, 31(5):1774-1781. doi: 10.13544/j.cnki.jeg.2021-0564
Citation: Zhang Zongtang, Gao Wenhua, Liu Changping, et al. 2023. Experimental study of gradation effect on compaction and strength characteristics of coal gangue subgrade filler[J]. Journal of Engineering Geology, 31(5):1774-1781. doi: 10.13544/j.cnki.jeg.2021-0564
shu

级配对煤矸石路基填料压实与强度特性的影响试验研究

doi: 10.13544/j.cnki.jeg.2021-0564
  • ①.

    湖南科技大学, 岩土工程稳定控制与健康监测湖南省重点实验室, 湘潭 411201, 中国

  • ②.

    湖南科技大学, 土木工程学院, 湘潭 411201, 中国

  • ③.

    甘肃靖远煤电股份有限公司, 平川 730913, 中国

基金项目: 

国家自然科学基金项目 52208341

湖南省自然科学基金项目 2020JJ4019

湖南省自然科学基金项目 2023JJ40293

湖南省科技人才托举工程项目——“小荷”科技人才项目 2023TJ-X74

浙江省交通科技项目 2020004

详细信息
    作者简介:

    张宗堂(1991-)，男，博士，讲师，主要从事岩土工程方面的教学与研究.E-mail: zzt@hnust.edu.cn

    通讯作者:

    高文华(1962-)，男，博士，教授，博士生导师，主要从事岩土工程和地下结构工程的教学与研究.E-mail: wenhuagao@163.com

  • 中图分类号: TU45

EXPERIMENTAL STUDY OF GRADATION EFFECT ON COMPACTION AND STRENGTH CHARACTERISTICS OF COAL GANGUE SUBGRADE FILLER

  • ①.

    Hunan Provincial Key Laboratory of Geotechnical Engineering for Stability Control and Health Monitoring, Hunan University of Science and Technology, Xiangtan 411201, China

  • ②.

    School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China

  • ③.

    Gansu Jingyuan Coal Industry and Electricity Power Co., Ltd., Pingchuan 730913, China

Funds: 

the National Natural Science Foundation of China 52208341

the Natural Science Foundation of Hunan Province 2020JJ4019

the Natural Science Foundation of Hunan Province 2023JJ40293

Xiaohe Sci-Tech Talents Special Funding under Hunan Provincial Sci-Tech Talents Sponsorship Program 2023TJ-X74

the Transportation Technology Foundation of Zhejiang Province 2020004

    摘要
  • 摘要: 为研究级配对煤矸石路基填料压实与强度特性的影响，以湖南湘潭某废弃煤矿的煤矸石为研究对象，通过大型振动压实试验与大型三轴试验研究了煤矸石路基填料压实与强度特性的级配效应。基于分形模型级配方程，求解得到了良好级配的取值界限，并分析了采用该级配方程进行级配设计的优越性。级配对煤矸石路基填料的压实与强度均存在较大影响。随着细颗粒含量的增加，最大干密度与偏应力均先增大后减小，反映出煤矸石路基填料的颗粒级配存在最优区间。在此基础上，获取了煤矸石路基填料的最优级配区间。试验结果表明，通过大型三轴试验与振动压实试验获取的煤矸石路基填料最优级配区间基本一致，考虑到大型三轴试验成本较高，可通过振动击实试验直接获取其最优级配。
    Abstract: This paper aims to study the effect of gradation on the compaction and strength characteristics of coal gangue subgrade filler. It takes the coal gangue collected from an abandoned coal mine in Xiangtan of Hunan Province as the research object. It studies the gradation effect of the compaction and strength behaviors for coal gangue subgrade filler using large vibration compaction experiment and large-scale triaxial test. Based on the gradation equation of fractal model, the limit of well gradation is captured, and the advantages of using this gradation equation for designing gradation are analyzed. Moreover, the gradation has great influence on the compaction and strength of coal gangue subgrade filler. With the increase of fine particle content, the maximum dry density and deviatoric stress first increase and then decrease, which reflects the existence of an optimal range of particle gradation for coal gangue subgrade filler. On this basis, the optimal gradation ranges of coal gangue subgrade filler is obtained. In addition, the test results show that the optimal gradation ranges of coal gangue subgrade filler obtained by large-scale triaxial test and vibration compaction experiment are basically the same. Considering the high cost of large-scale triaxial test, the vibration compaction is recomended to obtain the experiment optional gradation.
    • HTML全文

  • 图  1  湘潭市某煤矿煤矸石

    Figure  1.  Coal gangue of a coal mine in Xiangtan

    下载: 全尺寸图片 幻灯片

    图  2  煤矸石各粒组效果图

    Figure  2.  Each particle group of coal gangue

    下载: 全尺寸图片 幻灯片

    图  3  表面振动压实仪

    Figure  3.  The surface vibration compaction equipment

    下载: 全尺寸图片 幻灯片

    图  4  大型动静三轴试验机

    Figure  4.  The large dynamic and static triaxial apparatus

    下载: 全尺寸图片 幻灯片

    图  5  试验设计级配曲线

    Figure  5.  The gradation curve of test design

    下载: 全尺寸图片 幻灯片

    图  6  Cu、Cc随D的变化

    Figure  6.  The evolution of Cu and Cc versus D

    下载: 全尺寸图片 幻灯片

    图  7  最大干密度与分形维数的关系曲线

    Figure  7.  The relationship between the maximum dry density and fractal dimension

    下载: 全尺寸图片 幻灯片

    图  8  SG计算示意图

    Figure  8.  Diagram of SG calculation

    下载: 全尺寸图片 幻灯片

    图  9  最优级配区间

    Figure  9.  The range of the optimal gradation

    下载: 全尺寸图片 幻灯片

    图  10  煤矸石路基填料强度特性级配效应

    Figure  10.  Grading effect of strength behavior for coal gangue subgrade filler

    下载: 全尺寸图片 幻灯片

    图  11  破坏强度与分形维数的关系曲线

    Figure  11.  The relationship between failure strength and fractal dimension

    下载: 全尺寸图片 幻灯片
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  • 收稿日期:  2021-08-06
  • 修回日期:  2021-09-30
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