Shear Strength Characteristics of Root—Soil Composites Under Bearing Pressure Condition of Soil Pore Water

ZHANG Xin; YAO Xijun; LIU Jing; WANG Linhe; YIN Ruiping; XING Huiwen; JIN Caixia

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Shear Strength Characteristics of Root—Soil Composites Under Bearing Pressure Condition of Soil Pore Water

- Shear Strength Characteristics of Root—Soil Composites Under Bearing Pressure Condition of Soil Pore Water
- Bulletin of Soiland Water Conservation Vol. 29, Issue 4, Pages: 22-26(2010)
- 作者机构：
  
  1. 水利部牧区水利科学研究所,内蒙古,呼和浩特,010020
  2. 内蒙古农业大学生态环境学院,内蒙古,呼和浩特,010019
  3. 包头市达茂旗畜牧业局草原工作站,内蒙古,包头,014500
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2010
- 稿件说明：
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ZHANG Xin, YAO Xijun, LIU Jing, et al. Shear Strength Characteristics of Root—Soil Composites Under Bearing Pressure Condition of Soil Pore Water[J]. Bulletin of Soiland Water Conservation, 2010, 29(4): 22-26.
DOI：

ZHANG Xin, YAO Xijun, LIU Jing, et al. Shear Strength Characteristics of Root—Soil Composites Under Bearing Pressure Condition of Soil Pore Water[J]. Bulletin of Soiland Water Conservation, 2010, 29(4): 22-26. DOI：

摘要

采用直剪仪对4种沙生植物重塑的根—土复合体及素土进行快剪试验

探讨了其抗剪强度以及根径和垂直压力对抗剪强度的影响。结果表明

柠条、沙柳、沙地柏、白沙蒿根—土复合体在1.5m(25kPa)的浅层土体范围内抗剪强度均大于素土

4种植物根—土复合体的内摩擦角与素土相比差异不明显;在根径相同(1.25mm)的情况下

4种植物根—土复合体的黏聚力均大于素土

其黏聚力增加率的变化范围在4.60%～46.23%之间

大小顺序为:柠条>沙地柏>沙柳>白沙蒿;4种植物随着根径的增加

复合体的抗剪强度均有不同程度的增大。

Abstract

Root-soil composites of four desert plants and pure soil were investigated by fast-shear test using direct shear apparatus to explore shear strengths of root—soil composites and the impacts of root diameter and vertical pressure on shear strength. Results showed that shear strengths of the root—soil composites for Caragana microphylla Lam.

Salix psammophila

Sabina valgaris Ant.

and Artemisia sphaerocephala Krasch. are higher than shear strength of pure soil within 1.5 m shallow layer(25 kPa). Equivalent friction angles of the root—soil composites do not change obviously as compared with pure soil. For the same diameter (1.25 mm)

cohesive forces of the root—soil composites are greater than pure soil and the range of increased cohesion is 4.60%～46.23% and by the cohesion

the order of the plants is Caragana microphylla Lam.Sabina valgaris Ant.Salix psammophilaArtemisia sphaerocephala Krasch.. Shear strengths of the composites are increased to different extents when root diameter is increased.

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