Model Test Study on the Bearing Mechanism of Inclined Variable Cross-Section Piles Using Transparent Soil
Abstract
1. Introduction
2. Model Test and Materials
2.1. Preparation of Transparent Soil
2.2. Variable-Section Piles
2.3. Model Test Box
2.4. Visual Model Test System
2.5. Measurement System
2.6. Test Flowcharts and Programs
3. Test Results and Discussion
3.1. Effect of Variable Diameter Ratio on Vertical Bearing Characteristics of Piles
3.2. Effect of Inclination Angle on Pile Bearing Characteristics
3.3. Displacement of Soil around Pile under Working Load and Failure Load
3.4. Displacement of Soil around Pile under Working Load
3.5. Displacement of Soil around Pile under Failure Load
4. Conclusions
- When the pile body is slightly inclined, the soil on both sides of the pile body increases the friction force on it; the vertical bearing capacity of inclined piles with a 2% and 4% inclination is greater than that of vertical piles with a higher-than-8% inclination.
- For variable-section piles, the slope of the load–settlement curve becomes larger when the radial size of the variable section is too small (the ratio of the variable section to the diameter is 20/13), and, under the same load level, the corresponding settlement of variable-section monopiles with a small radial size of the variable section is larger, and, for the diameter of the variable section of 17 mm and 15 mm, its corresponding settlement is smaller than that of the variable-section straight piles.
- The change in the variation of the variation ratio at the variable section has a greater effect on the two-dimensional deformation of the soil around the pile than the inclination. The presence of a variable section does not improve the bearing capacity of variable-section inclined piles at inclination angles that are too large.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Properties | Value |
---|---|
Grain size | 0.5~1 mm |
Specific gravity (Gs) | 2.186 |
Coefficient of uniformity (Cu) | 1.83 |
Coefficient of curvature (Cc) | 1.00 |
ρmin/g·cm−3 | 0.970 |
ρmax/g·cm−3 | 1.274 |
ψ | 39.4 |
Refractive | 1.4585 |
C (Mpa) | 0.23 |
(°) | 31.46 |
Case Number | Degree of Inclination/% | Upper Section Diameter d1/mm | Plie Length L/mm | Lower Section Diameter d2/mm | Apply Vertical Load Q/N |
---|---|---|---|---|---|
C1 | 0 | 20 | 200 | 20 | 50/75/100/125/150/175/200 |
C2 | 2 | 15 | |||
C3 | 4 | 17 | |||
C4 | 8 | 13 |
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Ma, Q.; Li, J.; Liu, L.; Lu, X. Model Test Study on the Bearing Mechanism of Inclined Variable Cross-Section Piles Using Transparent Soil. Appl. Sci. 2024, 14, 6277. https://doi.org/10.3390/app14146277
Ma Q, Li J, Liu L, Lu X. Model Test Study on the Bearing Mechanism of Inclined Variable Cross-Section Piles Using Transparent Soil. Applied Sciences. 2024; 14(14):6277. https://doi.org/10.3390/app14146277
Chicago/Turabian StyleMa, Qiang, Jianyu Li, Lin Liu, and Xuesong Lu. 2024. "Model Test Study on the Bearing Mechanism of Inclined Variable Cross-Section Piles Using Transparent Soil" Applied Sciences 14, no. 14: 6277. https://doi.org/10.3390/app14146277
APA StyleMa, Q., Li, J., Liu, L., & Lu, X. (2024). Model Test Study on the Bearing Mechanism of Inclined Variable Cross-Section Piles Using Transparent Soil. Applied Sciences, 14(14), 6277. https://doi.org/10.3390/app14146277