Simulation Study on the Installation of Helical Anchors in Sandy Soil Using SPH-FEM
Abstract
:1. Introduction
2. Establishment of SPH-FEM Model
2.1. Computational Model and Material Parameters
2.2. Initial Boundary Conditions and Sensitivity Analysis of Installation Speed
2.3. Model Verification
3. Simulation Results and Discussion
3.1. Disturbance to the Soil by Helical Anchor Installation
3.2. Influence of AR on Installation Force and Torque
3.3. Influence of AR on the Uplift Bearing Capacity of Helical Anchor Foundations
3.4. Influence of AR on the Torque Correlation Factor Kt
4. Conclusions
- (1)
- The AR significantly influences the installation force and torque of the helical anchor. Compared to the “pitch-matched” (AR = 1.0) installation method, employing a high AR (AR = 1.2, 1.5) results in a significant increase in both installation force and torque, with the force increase being more pronounced than that of the torque. Conversely, using a low AR (AR = 0.8) for installation can significantly reduce the installation force, although the change in installation torque is relatively minor.
- (2)
- The ultimate uplift capacity of the helical anchor foundation is linearly and negatively correlated with the AR. At a low AR (AR = 0.8), the foundation achieves its maximum ultimate uplift capacity, which is approximately 4% higher than that obtained with the “pitch-matched” installation (AR = 1.0).
- (3)
- The AR affects the torque correlation coefficient Kt. The Kt value peaks when using the “pitch-matched” installation (AR = 1.0). Utilizing the Kt value determined at this AR to predict the ultimate uplift capacity of the helical anchor under other AR will likely result in an overestimation.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
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Material Type | Young’s Modulus E (MPa) | Poisson’s Ratio ν (-) | Internal Friction Angle φ (°) | Dilatancy Angle ψ (°) | Density ρ (kg/m3) |
---|---|---|---|---|---|
Helical Anchor | 2.06 × 105 | 0.30 | - | - | 7.85 × 103 |
Soil | 60.00 | 0.25 | 37.00 | 7.00 | 1.69 × 103 |
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Hu, H.; Yuan, C.; Zheng, H. Simulation Study on the Installation of Helical Anchors in Sandy Soil Using SPH-FEM. Appl. Sci. 2024, 14, 7672. https://doi.org/10.3390/app14177672
Hu H, Yuan C, Zheng H. Simulation Study on the Installation of Helical Anchors in Sandy Soil Using SPH-FEM. Applied Sciences. 2024; 14(17):7672. https://doi.org/10.3390/app14177672
Chicago/Turabian StyleHu, Haiyang, Chi Yuan, and Hong Zheng. 2024. "Simulation Study on the Installation of Helical Anchors in Sandy Soil Using SPH-FEM" Applied Sciences 14, no. 17: 7672. https://doi.org/10.3390/app14177672