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柱状节理岩体渗透性模型试验研究

巢志明, 王环玲, 徐卫亚, 贾朝军, 夏季

巢志明, 王环玲, 徐卫亚, 贾朝军, 夏季. 柱状节理岩体渗透性模型试验研究[J]. 岩土工程学报, 2016, 38(8): 1407-1416. DOI: 10.11779/CJGE201608007
引用本文: 巢志明, 王环玲, 徐卫亚, 贾朝军, 夏季. 柱状节理岩体渗透性模型试验研究[J]. 岩土工程学报, 2016, 38(8): 1407-1416. DOI: 10.11779/CJGE201608007
shu
CHAO Zhi-ming, WANG Huan-ling, XU Wei-ya, JIA Chao-jun, XIA Ji. Model tests on permeability of columnar jointed rock mass[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(8): 1407-1416. DOI: 10.11779/CJGE201608007
Citation: CHAO Zhi-ming, WANG Huan-ling, XU Wei-ya, JIA Chao-jun, XIA Ji. Model tests on permeability of columnar jointed rock mass[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(8): 1407-1416. DOI: 10.11779/CJGE201608007
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柱状节理岩体渗透性模型试验研究  English Version

  • 1. 河海大学港口海岸与近海工程学院,江苏 南京 210098; 2. 河海大学岩土工程科学研究所,江苏 南京 210098

基金项目: 国家自然科学基金项目（11172090,11272113,51479049,; 11572110,51209075）; 江苏省自然科学基金项目（BK2012809）
详细信息
    作者简介:

    巢志明（1991- ）,男,安徽淮南人,硕士研究生,主要从事岩石渗流力学方面的研究。E-mail: chaozhiming@qq.com。

    通讯作者:

    王环玲，E-mail：wanghuanlign@hhu.edu.cn

Model tests on permeability of columnar jointed rock mass

  • 1. College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China; 2. Geotechnical Research Institute, Hohai University, Nanjing 210098, China

摘要

    摘要
  • 摘要: 针对柱状节理岩体渗透性质的研究较少,开展了柱状节理岩体相似材料的模型试验,研究了柱状节理岩体相似材料在多次围压循环加卸载作用下的渗透性质,分析得出柱状节理岩体存在表征单元体积,可以采用等效连续介质模型分析柱状节理岩体的渗流性质,提出了计算柱状节理岩体渗透率张量的方法,基于张量不变性理论,推导出了柱状节理岩体渗透张量的主渗透系数的计算公式。研究表明：在围压初次加载阶段,柱状节理岩体渗透张量的主渗透系数随围压加载显著降低,在随后的围压循环加卸载阶段主渗透系数保持较低值,围压的加卸载对柱状节理岩体的主渗透系数影响较少,且在每个围压加卸载阶段,柱状节理岩体渗透张量的主渗透系数与围压均呈幂函数关系;柱状节理岩体渗透张量的主方向随着围压加卸载逐渐增大,在初次围压加卸载阶段增长显著,在此后的围压加卸载阶段缓慢增长;柱状节理岩体在低围压下渗透各向异性较为显著,且随着柱体倾角增大渗透各向异性逐渐减弱,在第一次围压加载阶段,随围压增大柱状节理岩体的渗透各向异性迅速减弱,当加载到高围压时,柱体倾角对柱状节理岩体的渗透各向异性几乎没有影响,在此后的围压循环加卸载阶段,柱状节理岩体的渗透各向异性稳定在较低水平,柱体倾角对渗透各向异性的影响很微弱;柱状节理岩体的渗透性质均是在第一次围压加载阶段发生显著变化,且围压卸载后渗透性质不能恢复,此后的围压循环加卸载对其渗透性质影响很小。
    Abstract: Because of the lack of researches on the permeability of the columnar jointed rock mass, model tests on the similar material of columnar jointed rock mass are carried out to study their permeability during cyclic loading and unloading of confining pressure. It is shown that the equivalent medium model is suitable for analysis of the permeability of columnar jointed rock mass. The method for calculating the permeability tensor of columnar jointed rock mass is proposed based on the tensor invariant theory. The researches show that the major permeability coefficient of the permeability tensor of columnar jointed rock mass is significantly reduced during the first loading of confining pressure, and it maintains a low value during the subsequent cyclic loading and unloading of confining pressure stage. The relationship between the major permeability coefficient of permeability tensor and the confining pressure is power function relationship during each cyclic loading and unloading of confining pressure stage. The major direction of the permeability tensor of columnar jointed rock mass increases gradually along with the loading and unloading of confining pressure. It increases significantly during the first confining pressure loading stage, but its increase becomes slow during the subsequent cyclic loading and unloading of confining pressure stage. The permeability anisotropy of columnar jointed rock mass under low confining pressure is more significant, and it decreases along with the increase of cylinder angle. The permeability anisotropy of columnar jointed rock mass decreases rapidly along with the increase of confining pressure during the first confining pressure loading stage, and cylinder angle has little impact on the permeability anisotropy of columnar jointed rock mass during high confining pressure stage. The permeability anisotropy of columnar jointed rock mass
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  • 收稿日期:  2015-11-15
  • 发布日期:  2016-08-24

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