[1]廖仁国,周先齐,蔡燕燕,等.钙质砂与石英砂渗透性差异对比试验[J].华侨大学学报(自然科学版),2019,40(5):600-605.[doi:10.11830/ISSN.1000-5013.201903049]
　LIAO Renguo,ZHOU Xianqi,CAI Yanyan,et al.Comparative Experiment on Permeability Difference Between Calcareous Sand and Quartz Sand[J].Journal of Huaqiao University(Natural Science),2019,40(5):600-605.[doi:10.11830/ISSN.1000-5013.201903049]
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钙质砂与石英砂渗透性差异对比试验()
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《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第40卷
期数:
2019年第5期
页码:
600-605
栏目:
出版日期:
2019-09-20

文章信息/Info

Title:
Comparative Experiment on Permeability Difference Between Calcareous Sand and Quartz Sand
文章编号:
1000-5013(2019)05-0600-06
作者:
廖仁国1;  周先齐1; 2;  蔡燕燕1;  张小燕3
1. 华侨大学 岩土工程研究所, 福建 厦门 361021;2. 厦门理工学院 土木工程与建筑学院, 福建 厦门 361024;3. 中国矿业大学(北京)力学与建筑工程学院, 北京 100083
Author(s):
LIAO Renguo1;  ZHOU Xianqi1; 2;  CAI Yanyan1;  ZHANG Xiaoyan3
1. Institute of Geotechnical Engineering, Huaqiao University, Xiamen 361021, China; 2. School of Civil Engineering and Architecture, Xiamen University of Technology, Xiamen 361024, China; 3. School of Mechanics and Civil Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China
关键词:
渗透系数;  围压;  钙质砂;  石英砂
Keywords:
permeability coefficient;  confining pressure;  calcareous sand;  quartz sand
分类号:
TU411.4
DOI:
10.11830/ISSN.1000-5013.201903049
文献标志码:
A
摘要:
针对相同粒径和级配的钙质砂与石英砂,通过单粒径三轴渗透试验和混合粒径三轴剪切渗透试验,对比分析单粒径砂渗透性受围压的影响规律,以及三轴剪切过程中混合粒径砂渗透性演化行为的差异.三轴渗透试验结果表明:钙质砂渗透性随围压的升高而降低,随粒径的增加而增加,与石英砂规律相似,钙质砂渗透系数与围压表现出较好的指数关系;在同级配条件下,钙质砂的渗透性小于普通石英砂;在给定围压和渗透压的条件下,钙质砂渗流量和时间呈现线性关系,依然服从达西定律.三轴剪切渗透试验结果表明:在较低围压下,钙质砂变形由剪缩到剪胀,渗透系数随应变的增加先下降,后升高,石英砂变形规律及渗透规律与钙质砂相似;在较高围压下,二者差异明显,钙质砂变形表现为剪缩特性,且伴有一定量的颗粒破碎,渗透系数降幅由快变慢直至稳定,而石英砂无论是变形规律还是渗透规律,均与较低围压下一致.
Abstract:
For the calcareous sand and quartz sand with the same particle size and gradation, the influence of confining pressure on the permeability of single particle size sand was analyzed by single particle size triaxial permeability test and mixed particle size triaxial shear permeability test, the difference of permeability evolution behavior of mixed particle size sand was discussed during triaxial shear. The results of triaxial permeability test show that the permeability of calcareous sand decreases with the increase of confining pressure, and increases with the increase of particle size, which is similar to that of quartz sand, the permeability coefficient of calcareous sand shows a good exponential relationship with confining pressure. The permeability of calcareous sand is awer than that of ordinary quartz sand, the seepage flow rate and time of calcareous sand show a linear relationship under given confining pressure and osmotic pressure, and still obey Darcy’s law. The results of triaxial shear permeability test show that under low confining pressure, the deformation of calcareous sand is from shear shrinkage to dilatancy, and the permeability coefficient decreases at first and then increases with the increase of strain. The deformation and permeability of quartz sand are similar to those of calcareous sand, but the difference is obvious at high confining pressure. The deformation of calcareous sand is characterized by shear shrinkage and a certain amount of particle breakage, and the decrease of permeability coefficient changes from fast to slow, to stable. The deformation and permeability of quartz sand are consistent with those under confining pressure.

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备注/Memo

备注/Memo:
收稿日期: 2019-03-24
通信作者: 蔡燕燕(1982-),女,副教授,博士,主要从事岩土力学与基础工程的研究.E-mail:yycai@hqu.edu.cn.
基金项目: 国家自然科学基金资助项目(51774147); 福建省自然科学基金资助项目(2017J01094); 华侨大学研究生科研创新基金资助项目(17013086020)http://www.hdxb.hqu.edu.cn
更新日期/Last Update: 2019-09-20