土壤干缩裂缝网络几何特征

张展羽; 王策; 朱成立; 朱文渊; 吴春辉

doi:10.3799/dqkx.2014.139

Volume 39 Issue 10

Oct. 2014

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Zhang Zhanyu, Wang Ce, Zhu Chengli, Zhu Wenyuan, Wu Chunhui, 2014. Geometric Characteristics of Shrinkage Crack Network in Soil. Earth Science, 39(10): 1465-1472. doi: 10.3799/dqkx.2014.139

Citation:

Zhang Zhanyu, Wang Ce, Zhu Chengli, Zhu Wenyuan, Wu Chunhui, 2014. Geometric Characteristics of Shrinkage Crack Network in Soil. Earth Science, 39(10): 1465-1472. doi: 10.3799/dqkx.2014.139

Zhang Zhanyu, Wang Ce, Zhu Chengli, Zhu Wenyuan, Wu Chunhui, 2014. Geometric Characteristics of Shrinkage Crack Network in Soil. Earth Science, 39(10): 1465-1472. doi: 10.3799/dqkx.2014.139

Citation:

Zhang Zhanyu, Wang Ce, Zhu Chengli, Zhu Wenyuan, Wu Chunhui, 2014. Geometric Characteristics of Shrinkage Crack Network in Soil. Earth Science, 39(10): 1465-1472. doi: 10.3799/dqkx.2014.139

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Geometric Characteristics of Shrinkage Crack Network in Soil

doi: 10.3799/dqkx.2014.139

Zhang Zhanyu^{1, 2
,},
Wang Ce^{1, 2},
Zhu Chengli^{1, 2},
Zhu Wenyuan^{1, 2},
Wu Chunhui^{1, 2}

1.
Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China of Ministry of Education, Hohai University, Nanjing 210098, China
2.
College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China

Received Date: 2014-02-23
Publish Date: 2014-10-01

Abstract

Abstract

An indoor experiment was conducted to investigate the development law of the shrinkage crack network in soil in this study. By application of digital image processing technology and the measurement functions of AutoCAD, geometric characteristics of shrinkage crack network were quantitatively analyzed under different moisture contents. The results show that the crack first was initiated when the moisture content was 43%. The length of crack skeleton and crack perimeter began to stabilize once the moisture content was close to 23%, and so did the crack ratio at the moisture content of 7%. The average width of the crack developed in three stages, namely, fluctuation growth, linear growth and stabilization, which reached a stable value as the moisture content came to 7%. The ratio of the crack fragments and intersections decreased as the moisture contents became lower and remained stable at 1.67 ultimately, which, together with dispersity of the aggregate and frequency distribution of intersection angles, revealed the square network distribution trend of the crack network. The mean tortuosity of the crack was reduced from 1.06 to 1.02 with the moisture content dropped and stabilized at 1.02, which indicates the whole tortuosity of the cracks and the variation law of the crack tortuosity during different periods.
- soil,
- crack,
- network,
- geometric characterization,
- soil testing

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References(25)

References

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