土体在磷石膏酸液渗透作用下的物性变化试验研究

李国英; 白闰平; 米占宽; 王芳

doi:10.11779/CJGE201503004

土体在磷石膏酸液渗透作用下的物性变化试验研究 English Version

李国英^{1, 3},
白闰平^{2, 1, 3},
米占宽^{1, 3},
王芳^{1, 3}

1. 南京水利科学研究院岩土工程研究所,江苏南京 210024; 2. 同济大学地下建筑与工程系,上海 200092; 3. 水利部土石坝破坏机理与防控技术重点实验室,江苏南京 210024

基金项目: 国家自然科学基金重大研究计划集成项目（91215301）; 中央级公益性科研院所基本科研业务费专项资金项目（Y312011, Y313012,Y314010）

详细信息

作者简介:
李国英（1962- ）,男,博士,教授级高级工程师,主要从事土工测试、土工数值模拟方面的研究工作。E-mail: gyli@nhri.cn。

中图分类号: TU47
计量
- 文章访问数: 375
- HTML全文浏览量: 4
- PDF下载量: 375
出版历程
- 收稿日期: 2014-07-07
- 发布日期: 2015-03-23

Experimental investigation on physical properties of soil in permeation process of phosphogypsum leachate

LI Guo-ying^{1, 3},
BAI Run-ping^{2, 1, 3},
MI Zhan-kuan^{1, 3},
WANG Fang^{1, 3}

1. Geotechnical Engineering Department, Nanjing Hydraulic Research Institute, Nanjing 210024, China; 2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 3. Key Laboratory of Earth-Rock Dam Failure Mechanism and Safety Control Techniques, Ministry of Water Resources, Nanjing 210024, China

摘要

摘要: 通过开展土体在磷石膏酸液渗透作用下的三轴渗透试验、土体的物性测试试验和化学成分测定试验,研究了土体在磷石膏酸液作用下的渗透系数的变化和干密度的变化,以及土样和水样的化学成分的变化。研究结果表明：当磷石膏酸液进入土体后,与土体中水溶性无机盐类以及某些矿物质发生了化学反应,在土体孔隙中生成了水溶性极差的新物质且逐步充满土体孔隙,随着渗流时间的增长,使土样的渗透系数呈幂函数规律减小,干密度逐渐增大,磷石膏酸液的酸性减弱,土体对酸液中氢离子的吸附作用,同样也会消耗酸液中氢离子,使酸液通过土样后酸性减弱。土体在磷石膏酸液的渗透作用下,随着渗流时间的增长渗透系数逐渐变小,当渗透系数足够小时可认为在土体中形成了磷石膏酸液的天然防渗层,可阻止了酸液对土壤的进一步侵蚀。
- 磷石膏酸液 /
- 化学反应 /
- 渗透系数 /
- 干密度
Abstract: A series of triaxial permeability tests on phosphogypsum leachate, dry density tests and chemical constituent tests on soil are carried out in order to investigate the change of physical properties of soil using different test methods. The test results show that after the permeation process of phosphogypsum leachate entering the soil pore space, the acidic liquor will react with the constituents in the soil, and these chemical reactions lead to the physical property change of soil. The important changes are as follows: (1) the permeability coefficient of soil decreases in a power function mode with the increase of seepage time; (2) after the permeation process of phosphogypsum leachate, the dry density of soil decreases from the bottom up in the soil sample, and the pH value of permeation liquor increases. In addition, when the permeability coefficient of soil decreases to a value (very small) with the increase of seepage time, a natural anti-seepage layer is formed in soil, and the natural anti-seepage layer can prevent the development of the acidic liquor permeation in soil and the further erosion of soil by acidic liquor.
- phosphogypsum leachate /
- chemical reaction /
- permeability coefficient /
- dry density

HTML全文

参考文献(15)

[1]	田文旗, 谢旭阳. 我国尾矿库现状及安全对策的建议[J]. 中国矿山工程, 2009, 38(6): 42-49. (TIAN Wen-qi, XIE Xu-yang. Tailings pond situation in china and safety countermeasures suggestion[J]. China Mine Engineering, 2009, 38(6): 42-49. (in Chinese))
[2]	魏作安, 沈楼燕, 李东伟. 探讨尾矿库设计领域中存在的问题[J]. 中国矿业. 2003, 12(3): 60-61. (WEI Zuo-an, SHEN Lou-yan, LI Dong-wei. Study on problem facing the design of tailing dam[J]. China Mining Magazine, 2003, 12(3): 60-61. (in Chinese))
[3]	沈楼燕, 魏作安. 探讨矿山尾矿库闭库的一些问题[J]. 金属矿山, 2002(6): 47-48. (SHEN Lou-yan, WEI Zuo-an. On problems in the closure of tailings dames[J]. Metal Mine, 2002(6): 47-48. (in Chinese))
[4]	吴佩芝. 湿法磷酸[M]. 北京: 化学工业出版社, 1987. (WU Pei-zhi. Wet process phosphoric acid[M]. Beijing: Chemical Industry Press, 1987. (in Chinese))
[5]	郑广俭, 张志华. 无机化工生产技术[M]. 北京: 化学工业出版社, 2003. (ZHEN Guang-Jian, ZHANG Zhi-Hua. Inorganic chemical production technology[M]. Beijing: Chemical Industry Press, 2003. (in Chinese))
[6]	陈五平. 无机化工工艺学[M]. 北京: 化学工业出版社, 2001. (CHEN Wu-ping. Process chemistry and technology for inorganic chemicals[M]. Beijing: Chemical Industry Press, 2001. (in Chinese))
[7]	沈婷, 王芳, 李国英. 磷石膏的物理力学特性[J]. 磷肥与复肥, 2008, 23(3): 21-23. (SHEN Ting, WANG Fang, LI Guo-ying. The physical-mechanical properties of phosphogypsum[J]. Phosphate and Compound Fertilizer, 2008, 23(3): 21-23. (in Chinese))
[8]	张世文, 王红艳. 影响尾矿坝安全稳定性因素分析及对策[J]. 矿业工程. 2004, 2(2): 61-63. (ZHANG Shi-wen, WANG Hong-yan. Analysis of factors influencing stability of tailing dam and measures for improving dams stability[J]. Mining Engineering, 2004, 2(2): 61-63. (in Chinese))
[9]	尹光志, 余果, 张东明. 细粒尾矿库地下渗流场的数值模拟分析[J]. 重庆大学学报(自然科学版), 2005, 28(6): 81-83. (YIN Guang-zhi, YU Guo, ZHANG Dong-ming. Numerical calculation analysis about seepage field of fine grained tailings pool[J]. Journal of Chongqing University (Natural Science Edition), 2005, 28(6): 81-83. (in Chinese))
[10]	路美丽, 崔莉. 复杂地形尾矿坝的三维渗流分析[J]. 岩土力学, 2006, 27(7): 1176-1180. (LU Mei-li, CUI Li. Three-dimensional seepage analysis for complex topographical tailings dam[J]. Rock and Soil Mechanics, 2006, 27(7): 1176-1180. (in Chinese))
[11]	秦华礼, 马池香. 水对尾矿坝稳定性的作用机理研究[J]. 金属矿山, 2008(10): 116-118. (QIN Hua-li, MA Chi-xiang. Mechanism of water effect on the stability of tailing dam[J]. Metal Mine, 2008(10): 116-118. (in Chinese))
[12]	徐晗, 许凯, 文松霖, 等. 磷石膏渣坝的稳定分析研究[J]. 长江科学院院报, 2008, 25(2): 42-45. (XU Han, XU Kai, WEN Song-lin, et al. Calculation of slope stability in phosphate gypsum dam[J]. Journal of Yangtze River Scientific Research Institute, 2008, 25(2): 42-45. (in Chinese))
[13]	袁聚云, 钱建固, 张宏鸣. 土质学与土力学[M]. 北京: 人民交通出版社, 2009. (YUN Ju-yun, QIAN Jian-gu, ZHANG Ming-hong. Soil properties and soil mechanics[M]. Beijing: China Communication Press, 2009. (in Chinese))
[14]	殷宗泽. 土工原理[M]. 北京: 中国水利水电出版社, 2007. (YIN Zong-ze. Geotechnical principle[M]. Beijing: China Water & Power Press, 2007. (in Chinese))
[15]	黄昌勇, 徐建明. 土壤学[M]. 北京: 中国农业出版社, 2010. (HUANG Chang-yong, XU Jian-ming. Agrology[M]. Beijing: China Agriculture Press, 2010. (in Chinese))

施引文献

资源附件(0)

计量

文章访问数: 375
HTML全文浏览量: 4
PDF下载量: 375
被引次数: 0

土体在磷石膏酸液渗透作用下的物性变化试验研究 English Version

作者简介: 李国英（1962- ）,男,博士,教授级高级工程师,主要从事土工测试、土工数值模拟方面的研究工作。E-mail: gyli@nhri.cn。

计量

出版历程

Experimental investigation on physical properties of soil in permeation process of phosphogypsum leachate

计量

出版历程

目录

作者简介:
李国英（1962- ）,男,博士,教授级高级工程师,主要从事土工测试、土工数值模拟方面的研究工作。E-mail: gyli@nhri.cn。