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[1]王炼,王旭东,尤苏南.黏砂混合土孔隙特性的试验研究[J].南京工业大学学报(自然科学版),2018,40(04):91-95.[doi:10.3969/j.issn.1671-7627.2018.04.015]
 WANG Lian,WANG Xudong,YOU Sunan.Experimental study on pore characteristics of sand-clay mixtures[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2018,40(04):91-95.[doi:10.3969/j.issn.1671-7627.2018.04.015]
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黏砂混合土孔隙特性的试验研究()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
40
期数:
2018年04期
页码:
91-95
栏目:
出版日期:
2018-07-20

文章信息/Info

Title:
Experimental study on pore characteristics of sand-clay mixtures
文章编号:
1671-7627(2018)04-0091-05
作者:
王炼1王旭东1尤苏南12
1.南京工业大学 岩土工程研究所,江苏 南京 210009; 2.化学工业岩土工程有限公司,江苏 南京 210009
Author(s):
WANG Lian1WANG Xudong1YOU Sunan12
1.Institute of Geotechnical Engineering,Nanjing Tech University,Nanjing 210009,China; 2.Chemical Industry Geotechnical Engineering Co. Ltd.,Nanjing 210009,China
关键词:
黏砂混合土 含砂量 孔隙特性 分形维数
Keywords:
sand-day mixtures sand content pore characteristics fractal dimension
分类号:
P411
DOI:
10.3969/j.issn.1671-7627.2018.04.015
文献标志码:
A
摘要:
通过制备不同干质量比例的黏砂混合土,开展混合土的压缩试验和压汞试验,探求含砂量对混合土压缩性和孔隙特性的影响,并采用孔隙体积分维数对孔隙的变化规律进行了描述。结果表明:含砂量的增加改变了混合土的初始进汞体积,降低了汞突破“瓶颈”阶段的进汞压力值; 混合土的累积孔隙体积随含砂量的增加而增大,累积孔隙体积增长“瓶颈”阶段的孔径变化区间随含砂量的增加而降低; 含砂量的增加使得土中孔隙分布从单峰值分布曲线向双峰值分布曲线过渡,混合土中孔隙体积也从以颗粒间孔隙为主向以团粒内孔隙为主变化; 颗粒间孔隙体积含量随含砂量的增加而降低,团粒内孔隙和团粒间孔隙的体积含量随含砂量增加而增大; 混合土中孔隙的体积含量越大孔隙的体积分维数越低,团粒内孔隙和团粒间孔隙的增加降低了混合土的压缩性。
Abstract:
The sand-clay mixtures by mixing clay and fine sand were prepared with different dry mass ratios.The effects of sand content on the pore characteristics and compressibility in the mixed soil were studied by using the mercury injection test and compression test.The change of porosity in the mixed soil was analyzed by the pore volume fractal dimension.Results showed that the increase of sand content changed the initial mercury intake volume of mixed soil and reduced mercury entry pressure at the "bottleneck" stage of mercury breakthrough.The cumulative pore volume of the mixed soil increased with the increase of sand content,and the pore size change interval in the "bottleneck" stage of cumulative pore volume growth decreased with the increase of sand content.The increase of sand content made the pore distribution of soil changng from the single peak distribution curve to the double peak value distribution curve,and the pore volume of mixed soil also changed from intergranular pore to pore dominated by aggregates.The volume of intergranular pore decreased with the increase of sand content.The volume of pores in aggregate and the volume of pores between aggregates increased with the increase of sand content.The larger the volume of pores in mixed soils, the lower the volume fractal dimension of pores was,and the increase of pore size and pore size of aggregate decreased the compressibility of mixed soil.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2017-05-02
作者简介:王炼(1992—),男,江苏靖江人,硕士,主要研究方向为岩土工程; 王旭东(联系人),教授,E-mail:cewxd@njtech.edu.cn.
引用本文:王炼,王旭东,尤苏南.黏砂混合土孔隙特性的试验研究[J].南京工业大学学报(自然科学版),2018,40(4):91-95..
更新日期/Last Update: 2018-07-30