Bearing Characteristics of Multi-Wing Pile Foundations under Lateral Loads in Dapeng Bay Silty Clay
Abstract
:1. Introduction
2. Research Area and Methodology
2.1. Description of the Calculated Section of the Multi-Wing Pile
2.2. Calculated Section of a Multi-Wing Pile
2.3. Verifying the Calculation Results for the Pile–Soil Interaction
3. Numerical Methods of Analysis
3.1. Three-Wing Pile
3.1.1. Effect of Wing–Diameter Ratio on Normalized Ultimate Lateral Capacity
3.1.2. Effect of Pile–Soil Interaction Coefficient on Normalized Ultimate Lateral Capacity
3.1.3. Effect of the Lateral-Load Direction on Normalized Ultimate Lateral Capacity
3.2. Four-Wing Pile
3.2.1. Effect of Wing–Diameter Ratio on Normalized Ultimate Lateral Capacity
3.2.2. Effect of Pile–Soil Interaction Coefficient on Normalized Ultimate Lateral Capacity
3.2.3. Effect of Lateral-Load Direction on Normalized Ultimate Lateral Capacity
4. Results and Discussion
4.1. Three-Wing Pile
4.1.1. Effect of Wing–Plate Width and Pile–Soil Interaction Coefficient on ULC
4.1.2. Effect of Lateral-Load Direction on ULC
4.2. Four-Wing Pile
4.2.1. Effect of Wing-Plate Width and Pile–Soil Interaction Coefficient on ULC
4.2.2. Effect of Lateral-Load Direction on ULC
5. Conclusions
- (1)
- When the empirical equation of ULC of the three-wing piles that varied with each parameter was fitted (with a correlation coefficient greater than 0.99), the width of the wing plate was found to have a significant influence on ULC of the wing pile.
- (2)
- The normalized ULC of the three-wing pile increased with the pile–soil interaction coefficient. The change trend was similar in the four-wing pile; however, when the pile–soil interaction coefficient was greater than 0.2, the increase in the normalized ULC of the four-wing pile was not prominent.
- (3)
- For both three-wing and four-wing piles, the pile–soil interaction coefficient had relatively little effect on the maximum distance from the shear plastic ring of the soil to the pile center.
- (4)
- When the wing width was 0.3, the maximum distance from the shear plastic ring of the soil to the three-wing pile center was 1.03 m, which is more than five times the pile diameter. However, under the same conditions, the four-wing pile did not show any increase in the shear plastic zone of the soil around the pile.
- (5)
- There was a double shear plastic ring of soil around the four-wing pile. The four-wing piles had a more symmetrical influence on the soil around the piles than the three-wing ones. When both the three-wing pile and the four-wing pile reach their respective ultimate bearing capacities, the reinforcement needed for the soil around a four-wing pile will therefore be higher than for that around a three-wing pile.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Soil Classification | Average Soil Depth h (m) | Saturated Density rsat (g/cm3) | Compression Modulus Es (Mpa) | Shear Strength Su (kPa) | Liquid Index Ip | Foundation-Bearing Capacity fa (kPa) |
---|---|---|---|---|---|---|
Silty clay | 2.5 | 2 | 30 | 50 | 4.4 | 140 |
Sand and clay interlayer | 5 | 2.13 | 60 | - | 6 | 200 |
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Wang, H.; Fu, D.; Yan, T.; Pan, D.; Liu, W.; Ma, L. Bearing Characteristics of Multi-Wing Pile Foundations under Lateral Loads in Dapeng Bay Silty Clay. J. Mar. Sci. Eng. 2022, 10, 1391. https://doi.org/10.3390/jmse10101391
Wang H, Fu D, Yan T, Pan D, Liu W, Ma L. Bearing Characteristics of Multi-Wing Pile Foundations under Lateral Loads in Dapeng Bay Silty Clay. Journal of Marine Science and Engineering. 2022; 10(10):1391. https://doi.org/10.3390/jmse10101391
Chicago/Turabian StyleWang, Hao, Dewei Fu, Tiantian Yan, Deng Pan, Weiwei Liu, and Liqun Ma. 2022. "Bearing Characteristics of Multi-Wing Pile Foundations under Lateral Loads in Dapeng Bay Silty Clay" Journal of Marine Science and Engineering 10, no. 10: 1391. https://doi.org/10.3390/jmse10101391