[1]SONG Pengshuai,WANG Jian,CHEN Lin,et al.Effect of Wet-Dry Cycle on Shear Strength of Compacted Soil[J].Research of Soil and Water Conservation,2021,28(02):74-79.
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Effect of Wet-Dry Cycle on Shear Strength of Compacted Soil
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 02
Page number:
74-79
Column:
Public date:
2021-02-06
- Title:
- Effect of Wet-Dry Cycle on Shear Strength of Compacted Soil
- Keywords:
- wet-dry cycle; shear strength; internal friction angle; cohesion
- CLC:
- S157; TU411
- DOI:
- -
- Abstract:
- The chief aim of this paper is to explore the mechanism of deformation of manual rammed ridges under natural forces in agricultural production practice. Several terrace soil samples were collected from loess area, rammed and then put into wet-dry cycle to observe its impact on shear strength in laboratory. The results showed that with the increase of the frequency of wet-dry cycle, cohesion of soil increased gradually; internal friction angle decreased gradually, and reached the minimum at the 7th cycle; under 100 kPa vertical pressure, no significant impact was found on shear strength; under 200 kPa vertical pressure, shear strength first increased and then stabilized; under 300 kPa and 400 kPa vertical pressure, shear strength first increased then decreased and at last stabilized and reached the maximum at the 2nd cycle; in addition, with the same frequency of wet-dry cycle, shear strength increased gradually with the increase of vertical pressure, indicating that there was a positive correlation between them; the significance analysis proposed that wet-dry cycle had a greater impact on internal friction angle than on cohesion under the same condition. These findings implicate that shear strength is affected significantly by wet-dry cycle. With the increase of the frequency of the latter, shear strength decreases, cohesion of soil increases, and internal friction angle decreases.
- References:
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Last Update:
2021-02-10