钙质砂的渗透特性及其影响因素探讨

doi:10.16285/j.rsm.2017.10.016

›› 2017, Vol. 38 ›› Issue (10): 2895-2900.doi: 10.16285/j.rsm.2017.10.016

钙质砂的渗透特性及其影响因素探讨

胡明鉴¹，蒋航海^{1, 2, 3}，朱长歧¹，翁贻令^{1, 2, 3}，阮洋¹，陈伟俊^{1, 2, 3}

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. 广西大学土木建筑工程学院，广西南宁 530004；3. 广西大学海洋学院，广西南宁 530004

收稿日期:2017-04-07 出版日期:2017-10-10 发布日期:2018-06-05
作者简介:胡明鉴，男，1974年生，博士，副研究员，主要从事地下水动力学和滑坡泥石流方面的研究工作。
基金资助:
国家自然科学基金面上项目(No. 41572304，No. 41372313)；中科院科技先导专项A类子课题(No. XDA13010301)。

Discussion on permeability of calcareous sand and its influencing factors

HU Ming-jian¹, JIANG Hang-hai^{1, 2, 3}, ZHU Chang-qi¹, WENG Yi-ling^{1, 2, 3}, RUAN Yang¹, CHEN Wei-jun^{1, 2, 3}

1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 2. College of Civil Engineering and Architecture, Guangxi University, Nanning, Guangxi 530004, China; 3. College of Ocean, Guangxi University, Nanning, Guangxi 530004, China

Received:2017-04-07 Online:2017-10-10 Published:2018-06-05
Supported by:
This work was supported by the National Natural Science Foundation of China (41572304, 41372313) and the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA13010301).

摘要/Abstract

摘要： 钙质砂在沉积过程中大多保持着原生生物骨架中的细小孔隙，多孔隙且含内孔隙、形状不规则、强度低易破碎、颗粒棱角度高、会胶结等特殊性质。其工程力学性质较一般陆相、海相沉积物有较大的差异，尤其多孔性和形状高度不规则性致使其渗透性与其他岩土介质差异明显。针对钙质砂的渗透特性开展现场多组双环渗透试验，分析密实度和颗粒级配对钙质砂渗透性的影响。现场渗透试验显示，钙质砂中的渗流速度先缓慢增大再趋于稳定，最后稳定在小幅度波动范围内；钙质砂的渗透系数K与不均匀系数Cu呈负相关关系；由于颗粒分析曲线上小于有效粒径d10的曲线拐点多出现在小于某粒径土重累计百分含量为4%对应的粒径d4附近，以新变量d4与限制粒径d60之比d4 /d60分析其与钙质砂渗透性的关系，并经指数函数拟合得一定干密度和压实度下的钙质砂的渗透系数关系式或，根据Cu≤5、5＜Cu≤10、10＜Cu≤20和Cu≥20的取值，n分别取值2、5、4、3。

关键词: 钙质砂, 双环渗透试验, 密实度, 不均匀系数, 指数函数

Abstract: In the deposition process, the calcareous sand, mostly retaining tiny pores of the protozoan skeleton, shows hierarchical porosity, irregular shape, high angular edge, low strength and fragile, cemented property of particles. Therefore calcareous sand are different from general terrestrial and marine sediments in its engineering properties especially the permeability due to the hierarchical porosity and highly-irregular shape. In this study, the double-ring permeation experiments are carried out to analyze the effect of density and particle size on the permeability of calcareous sand. Test results show that the seepage rate of calcareous sand increases gradually and then stabilizes within a range of small fluctuation. The permeability coefficient of calcareous sand is negatively correlated with the nonuniformity coefficient Cu. As the inflection points of particle-size distribution curve become smaller than effective diameter d10 appear near the weight-accumulative 4% percent diameter d4 of soil, the ratio of d4 to constrained diameter d60 is adopted to analyze the relationship between the dry density and the permeability of calcareous sand. An exponential function is fitted between permeability coefficient with dry density and compaction degree . The fitting exponential function of the calcareous sand permeability coefficient is or . If the values of Cu≤5, 5

Key words: calcareous sand, double-ring permeation experiment, degree of compaction, nonuniformity coefficient, exponential function

中图分类号:

TU 43

胡明鉴，蒋航海，朱长歧，翁贻令，阮洋，陈伟俊, . 钙质砂的渗透特性及其影响因素探讨[J]. , 2017, 38(10): 2895-2900.

HU Ming-jian, JIANG Hang-hai, ZHU Chang-qi, WENG Yi-ling,RUAN Yang, CHEN Wei-jun, . Discussion on permeability of calcareous sand and its influencing factors[J]. , 2017, 38(10): 2895-2900.

参考文献

相关文章 15

[1]	闫超萍, 龙志林, 周益春, 旷杜敏, 陈佳敏, . 钙质砂剪切特性的围压效应和粒径效应研究[J]. 岩土力学, 2020, 41(2): 581-591.
[2]	芮圣洁, 国振, 王立忠, 周文杰, 李雨杰, . 钙质砂与钢界面循环剪切刚度与阻尼比的试验研究[J]. 岩土力学, 2020, 41(1): 78-86.
[3]	张晨阳, 谌民, 胡明鉴, 王新志, 唐健健, . 细颗粒组分含量对钙质砂抗剪强度的影响[J]. 岩土力学, 2019, 40(S1): 195-202.
[4]	柴维, 龙志林, 旷杜敏, 陈佳敏, 闫超萍. 直剪剪切速率对钙质砂强度及变形特征的影响[J]. 岩土力学, 2019, 40(S1): 359-366.
[5]	窦锦钟, 邵雪莹, 廖晨聪, 陈锦剑, . 不同夯点布置形式下群夯加固效果研究[J]. 岩土力学, 2019, 40(S1): 527-534.
[6]	胡明鉴, 崔翔, 王新志, 刘海峰, 杜韦, . 细颗粒对钙质砂渗透性的影响试验研究[J]. 岩土力学, 2019, 40(8): 2925-2930.
[7]	彭宇, 丁选明, 肖杨, 楚剑, 邓玮婷, . 基于染色标定与图像颗粒分割的钙质砂颗粒破碎特性研究[J]. 岩土力学, 2019, 40(7): 2663-2672.
[8]	谌民, 张涛, 单华刚, 王新志, 孟庆山, 余克服, . 钙质砂压缩波速与物理性质参数关系研究[J]. 岩土力学, 2019, 40(6): 2275-2283.
[9]	曹梦, 叶剑红, . 中国南海钙质砂蠕变-应力-时间四参数数学模型[J]. 岩土力学, 2019, 40(5): 1771-1777.
[10]	王胤, 周令新, 杨庆. 基于不规则钙质砂颗粒发展的拖曳力系数模型及其在细观流固耦合数值模拟中应用[J]. 岩土力学, 2019, 40(5): 2009-2015.
[11]	谷建晓, 杨钧岩, 王勇, 吕海波, . 基于南水模型的钙质砂应力−应变关系模拟[J]. 岩土力学, 2019, 40(12): 4597-4606.
[12]	胡明鉴, 张晨阳, 崔翔, 李焜耀, 唐健健, . 钙质砂中毛细水高度与影响因素试验研究[J]. 岩土力学, 2019, 40(11): 4157-4164.
[13]	沈扬, 沈雪, 俞演名, 刘汉龙, 葛华阳, 芮笑曦, . 粒组含量对钙质砂压缩变形特性影响的宏细观研究[J]. 岩土力学, 2019, 40(10): 3733-3740.
[14]	高冉, 叶剑红, . 中国南海吹填岛礁钙质砂动力特性试验研究[J]. 岩土力学, 2019, 40(10): 3897-3896.
[15]	魏久淇, 吕亚茹, 刘国权, 张磊, 李磊, . 钙质砂一维冲击响应及吸能特性试验[J]. 岩土力学, 2019, 40(1): 191-198.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed

钙质砂的渗透特性及其影响因素探讨

Discussion on permeability of calcareous sand and its influencing factors

PDF (Chinese)

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 0