Shear Strength Characteristics and Estimation Model of Weathered Sawtooth Structural Plane
[1]LIAO Jun,DENG Tao,TANG Gang,et al.Shear Strength Characteristics and Estimation Model of Weathered Sawtooth Structural Plane[J].Journal of Zhengzhou University (Engineering Science),2023,44(06):112-118.[doi:10.13705/j.issn.1671-6833.2023.03.003]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
44卷
Number of periods:
2023 06
Page number:
112-118
Column:
Public date:
2023-12-25
- Title:
- Shear Strength Characteristics and Estimation Model of Weathered Sawtooth Structural Plane
- CLC:
- TU452
- DOI:
- 10.13705/j.issn.1671-6833.2023.03.003
- Abstract:
- In order to study the influence of weathering degree on the shear strength characteristics such as shear strength and shear deformation of sawtooth structural planes with different undulating angles, four kinds of regular sawtooth structural planes with undulating angles of 15°, 25°, 35° and 45° were made. The rock samples with different weathering degrees were prepared by indoor weathering simulation test, and the direct shear test of indoor structural plane under different normal stresses was carried out to explore the variation law of shear strength and parameters of limestone sawtooth structural plane. The test results showed that shear stress-shear displacement curve of serrated structural plane showed peak shear type, which increased approximately linearly at first, then decreased after reaching the peak shear stress, and finally tended to be stable and maintained a certain residual shear strength. With the increase of weathering degree, the shear strength of limestone sawtooth structural plane showed a decreasing trend, and the shear strength parameters had different degrees of deterioration, and the deterioration degree of cohesion was greater than that of friction angle, while the fluctuation angle of structural plane was positively correlated with the shear strength. Based on the model test results, the shear strength estimation model of weathered sawtooth structural plane was established to reveal the quantitative relationship between shear strength and weathering degree and fluctuation angle.
- References:
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Last Update:
2023-10-22