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The Measurement of Shear Characteristics of Paddy Soil in Poyang Lake Area

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  • Long Xue

    (Jiangxi Key Laboratory of Modern Agricultural Equipment, College of Engineering, Jiangxi Agricultural University, Nanchang 330045, China
    Key Laboratory of Optics-Electrics Application of Biomaterials of Jiangxi Province, Jiangxi Agricultural University, Nanchang 330045, China)

  • Lan Li

    (Jiangxi Key Laboratory of Modern Agricultural Equipment, College of Engineering, Jiangxi Agricultural University, Nanchang 330045, China)

  • Jianhui Zeng

    (Jiangxi Key Laboratory of Modern Agricultural Equipment, College of Engineering, Jiangxi Agricultural University, Nanchang 330045, China)

  • Bohan Huang

    (Jiangxi Key Laboratory of Modern Agricultural Equipment, College of Engineering, Jiangxi Agricultural University, Nanchang 330045, China)

  • Yuqi Zeng

    (Jiangxi Key Laboratory of Modern Agricultural Equipment, College of Engineering, Jiangxi Agricultural University, Nanchang 330045, China)

  • Muhua Liu

    (Jiangxi Key Laboratory of Modern Agricultural Equipment, College of Engineering, Jiangxi Agricultural University, Nanchang 330045, China)

  • Jing Li

    (Jiangxi Key Laboratory of Modern Agricultural Equipment, College of Engineering, Jiangxi Agricultural University, Nanchang 330045, China
    Key Laboratory of Optics-Electrics Application of Biomaterials of Jiangxi Province, Jiangxi Agricultural University, Nanchang 330045, China)

Abstract

Understanding the shear characteristics of paddy fields is of great significance for the design of high-trafficability paddy wheels and to improve the trafficability of the tiller in paddy fields. Taking the paddy soil in Poyang Lake area of Jiangxi Province as the research object, a simple, self-designed bevameter was constructed to measure the apparent cohesion c and apparent internal friction angle φ of paddy soil with water content of 37% by weight using an annular shear plate. The effects of different shear speeds, shear grouser heights, and shear plate diameters on the measured c and φ were investigated. The measured values of c and φ were 1.89–2.35 kPa and 10.2–11.4°(deg), respectively. With the increase in shear speed, shear plate diameter, and grouser height, the value of c increased. Shear plate diameter and shear speed had small effect on c , whose change rate did not exceed 7.8%. However, shear grouser height had a greater influence on c , and the measured c increased by 24.5%. The influence of the three factors on φ followed the order: shear speed > shear plate diameter > shear grouser height, but the variation in φ did not exceed 1.2°(deg). The optimal operational conditions were: shear plate diameter of 250 mm with inner diameter of 150 mm, shear grouser height of 10 mm, with a shear speed of π/120 rad/s, and the apparent cohesion and apparent internal friction angle are 1887.8 pa and 11.06° (deg), respectively.

Suggested Citation

  • Long Xue & Lan Li & Jianhui Zeng & Bohan Huang & Yuqi Zeng & Muhua Liu & Jing Li, 2022. "The Measurement of Shear Characteristics of Paddy Soil in Poyang Lake Area," Sustainability, MDPI, vol. 14(19), pages 1-10, September.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:19:p:11960-:d:921970
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    References listed on IDEAS

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    1. Zhen Han & Jiangwen Li & Pengfei Gao & Bangwei Huang & Jiupai Ni & Chaofu Wei, 2020. "Determining the Shear Strength and Permeability of Soils for Engineering of New Paddy Field Construction in a Hilly Mountainous Region of Southwestern China," IJERPH, MDPI, vol. 17(5), pages 1-16, February.
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