珊瑚砂三维孔隙微观特性研究

doi:10.16285/j.rsm.2020.0093

岩土力学 ›› 2020, Vol. 41 ›› Issue (11): 3632-3640.doi: 10.16285/j.rsm.2020.0093

珊瑚砂三维孔隙微观特性研究

崔翔^{1, 2}，胡明鉴¹，朱长歧¹，汪稔¹，王新志¹，王天民^{1, 2}

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实验室，湖北武汉 430071；2. 中国科学院大学，北京 100049

收稿日期:2020-01-09 修回日期:2020-04-13 出版日期:2020-11-11 发布日期:2020-12-25
作者简介:崔翔，男，1993年生，博士研究生，主要从事珊瑚岛礁地下淡水透镜体的研究。
基金资助:
国家自然科学基金项目(No.41877271, No.41572304)；中国科学院战略性先导科技专项(A类)子课题(No.XDA13010301)。

Study on the microscopic characteristics of three-dimensional pores in coral sand

CUI Xiang^{1, 2}, HU Ming-jian¹, ZHU Chang-qi¹, WANG Ren¹, WANG Xin-zhi¹, WANG Tian-min^{1, 2}

1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China

Received:2020-01-09 Revised:2020-04-13 Online:2020-11-11 Published:2020-12-25
Supported by:
This work was supported by the National Natural Science Foundation of China (41877271, 41572304) and the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA13010301).

摘要/Abstract

摘要： 孔隙是多孔介质内渗流的发生场所，与介质渗透性存在必然的联系。珊瑚砂因其特殊的物质来源和形成过程，较陆源砂具有截然不同的孔隙特性。通过一系列微观研究手段，从本质上揭示了珊瑚砂特殊孔隙性质的原因。研究发现，从孔隙形状、孔喉尺寸和整体连通性3个角度描述孔隙性质较为合理。其中，孔隙形状用形状因子度量，孔喉尺寸包括孔隙半径和喉道半径，珊瑚砂多孔介质整体连通性利用配位数进行描述。而影响孔隙形状、孔喉尺寸和整体连通性的主导因素包括颗粒形状和颗粒表面粗糙度两方面。其中颗粒形状主要影响孔隙形状、喉道尺寸、孔喉尺寸离散性和介质内部连通性的均匀分布情况。颗粒表面粗糙度主要影响孔隙形状、孔隙形状离散性、孔隙尺寸和介质整体连通性。

关键词: 珊瑚砂, 石英砂, 微观角度, 颗粒形貌, 孔隙性质

Abstract: The pore is the place where the seepage occurs in the porous medium, which is inevitably related to the permeability of the medium. Due to the special material source and formation process, coral sand has completely different pore characteristics compared with terrestrial sand. Through a series of microscopic studies, the reason for the special pore properties of coral sand in essence was revealed. It is found that it is reasonable to describe the properties of pores from the aspect of pore shape, pore throat size and global connectivity. Among them, pore shape is measured by the shape factor. Pore throat size includes pore radius and throat radius. Global connectivity in the porous media is described by coordination numbers. Particle shape and particle surface roughness are the main factors affecting pore shape, pore throat size and global connectivity. Particle shape mainly affects pore shape, throat size, pore throat size dispersion and the uniform distribution of connectivity in the medium. Particle surface roughness mainly affects pore shape, pore shape dispersion, pore size and global connectivity in the porous medium.

Key words: coral sand, quartz sand, microscopic angle, particle morphology, pore properties

中图分类号:

TU 441

崔翔, 胡明鉴, 朱长歧, 汪稔, 王新志, 王天民, . 珊瑚砂三维孔隙微观特性研究[J]. 岩土力学, 2020, 41(11): 3632-3640.

CUI Xiang, HU Ming-jian, ZHU Chang-qi, WANG Ren, WANG Xin-zhi, WANG Tian-min, . Study on the microscopic characteristics of three-dimensional pores in coral sand[J]. Rock and Soil Mechanics, 2020, 41(11): 3632-3640.

参考文献

相关文章 15

[1]	吕亚茹, 王冲, 黄厚旭, 左殿军, . 珊瑚砂细观颗粒结构及破碎特性研究[J]. 岩土力学, 2021, 42(2): 352-360.
[2]	邓玮婷, 丁选明, 彭宇, . 珊瑚砂地基中膨胀混凝土桩竖向受压承载性能研究[J]. 岩土力学, 2020, 41(8): 2814-2820.
[3]	梁珂, 陈国兴, 杭天柱, 刘抗, 何杨, . 砂类土最大动剪切模量的新预测模型[J]. 岩土力学, 2020, 41(6): 1963-1970.
[4]	徐东升, 黄明, 黄佛光, 陈成. 不同级配珊瑚砂水泥胶结体的破坏行为分析[J]. 岩土力学, 2020, 41(5): 1531-1539.
[5]	马维嘉, 陈国兴, 吴琪, . 复杂加载条件下珊瑚砂抗液化强度试验研究[J]. 岩土力学, 2020, 41(2): 535-542.
[6]	吴琪, 丁选明, 陈志雄, 陈育民, 彭宇, . 不同地震动强度下珊瑚礁砂地基中桩-土-结构地震响应试验研究[J]. 岩土力学, 2020, 41(2): 571-580.
[7]	梁珂, 陈国兴, 刘抗, 王彦臻, . 饱和珊瑚砂最大动剪切模量的循环加载衰退特性及预测模型[J]. 岩土力学, 2020, 41(2): 601-611.
[8]	吴杨, 崔杰, 李能, 王星, 吴毅航, 郭舒洋, . 岛礁吹填珊瑚砂力学行为与颗粒破碎特性试验研究[J]. 岩土力学, 2020, 41(10): 3181-3191.
[9]	梁珂, 何杨, 陈国兴, . 南沙珊瑚砂的动剪切模量和阻尼比特性试验研究[J]. 岩土力学, 2020, 41(1): 23-31.
[10]	张小燕, 蔡燕燕, 周浩燃, 杨洋, 李玉龙, . 珊瑚砂大剪切应变下的剪切特性和分形维数[J]. 岩土力学, 2019, 40(2): 610-615.
[11]	王步雪岩, 孟庆山, 韦昌富, 谌民, 阎钶, 张珀瑜, . 多投影面下珊瑚砂砾颗粒形貌量化试验研究[J]. 岩土力学, 2019, 40(10): 3871-3878.
[12]	方祥位，李晶鑫，李捷，申春妮,. 珊瑚砂微生物固化体三轴压缩试验及损伤本构模型研究[J]. , 2018, 39(S1): 1-8.
[13]	张小燕，蔡燕燕，王振波，江芸倩，. 珊瑚砂高压力下一维蠕变分形破碎及颗粒形状分析[J]. , 2018, 39(5): 1573-1580.
[14]	陈国庆，郭帆，王剑超，周玉新,. 冻融后石英砂岩三轴蠕变特性试验研究[J]. , 2017, 38(S1): 203-210.
[15]	李顺群，贾红晶，王杏杏，桂超,. 轴平移技术在基质吸力测控中的局限性和误差分析[J]. , 2016, 37(11): 3089-3095.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed

珊瑚砂三维孔隙微观特性研究

Study on the microscopic characteristics of three-dimensional pores in coral sand

PDF (Chinese)

PDF (English)

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

Metrics

本文评价

推荐阅读 10