Three-Dimensional Discrete Element Analysis of Bearing Characteristics of Concrete–Cored Sand–Gravel Pile Composite Foundation under Cyclic Dynamic Load
Abstract
:1. Introduction
2. Parameter Calibration and Modelling
2.1. Parameter Calibration
2.1.1. Parameters of Soft Soil
2.1.2. Parameters of Sand–Gravel
2.1.3. Parameters of Concrete
2.2. Establishment of 3D Model
3. Analysis of Simulation Results
3.1. Pile Stress Analysis
3.2. Analysis of Radial Stress Coefficient
3.3. Analysis of the Coordination Number of Pile Particles
3.4. Stress Analysis of the Soil around the Pile
3.5. Analysis of Pile-Soil Stress Ratio
4. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
- Chen, Q.N.; Zhao, M.H.; Zhou, G.H.; Zhang, Z.H. Bearing capacity and mechanical behavior of CFG pile composite foundation. J. Cent. South Univ. 2008, 15, 45–49. [Google Scholar] [CrossRef]
- Liu, Q.; Ding, W.; Wang, B.; Liu, H.H.; Wang, B.Y. The Unified Solution of Gravel Pile Limit Bearing Capacity of Single Pile Composite Foundation. Appl. Mech. Mater. 2013, 438, 1409–1413. [Google Scholar] [CrossRef]
- Luo, M. Finite element analysis of gravel pile composite foundation under flexible foundation of Airport Engineering. In IOP Conference Series: Earth and Environmental Science; IOP Publishing: Bristol, UK, 2018. [Google Scholar]
- Wei, W.; Xie, H.; Mao, X.; Hu, H. Prediction of Bearing Capacity of Composite Foundation of Vibrating Gravel Pile Based on RBF Neural Network. In Proceedings of the 2019 IEEE 14th International Conference on Intelligent Systems and Knowledge Engineering (ISKE), Dalian, China, 14–16 November 2019. [Google Scholar]
- Umravia, N.B.; Solanki, C.H. Comparative Study of Existing Cement Fly Ash Gravel pile and Encased Stone Column Composite Foundation. In International Conference on Advances in Civil Engineering (ICACE 2021); IOP Publishing: Bristol, UK, 2021. [Google Scholar]
- Gao, F.; Cheng, X.; Zhao, Y.; Lv, Q.; Chen, X. Bearing Capacity Characteristics of Compacted Cement Stabilized Gravel Pile Composite Foundation. Int. J. Pavement Res. Technol. 2024, 17, 170–182. [Google Scholar] [CrossRef]
- Zhao, W.; Tang, T.; Cai, X.; Huang, J.; Sha, Y.; Huang, J.; Le, M. A New Method of Improving Soft Soil: Composite Foundation with Concrete-Cored Sand-Gravel Piles. China CN200610037621. 2[P], 28 June 2006. (In Chinese). [Google Scholar]
- Chen, S.; Guan, Y.; Dai, J.; Zhao, W. Field experiment study on composite foundation of concrete core sand and gravel pile. Chin. J. Geotech. Eng. 2023, 23, 04023026. [Google Scholar]
- Yin, F.; Zhou, H.; Liu, H.; Chu, J. Experimental study on the effects of vehicle load and dynamic load on the dynamic characteristics of composite foundation with X-shaped pile network. Geotech. Mech. 2019, 40, 1324–1330+1340. [Google Scholar]
- Niu, T.; Liu, H.; Ding, X.; Chen, Y. Model test on vibration characteristics of pile-network composite foundation under high-speed railway train loading. Geotechnics 2018, 39, 872–880. [Google Scholar]
- He, J.; Guo, D.; Song, D.; Liu, M.; Zhang, L.; Wen, Q. Experimental study on working characteristics of wedge-shaped composite piles with strong core under cyclic loading. Geotechnics 2023, 44, 1353–1362+1374. [Google Scholar]
- Li, T.; Xu, J.; Liu, K. Effect of rigid pile on load bearing behavior of pile reinforced cushion composite foundation under cyclic load. Ind. Build. 2021, 43, 137–142. [Google Scholar]
- Yuan, Y.; Zhao, M.; Xiao, Y.; Yang, C. Model testing of encased stone column composite foundations under traffic loads. Adv. Civ. Eng. 2021, 2021, 1–11. [Google Scholar] [CrossRef]
- Zhu, Z.R.; Guan, W.; Han, K.; Wu, H.G.; Zhao, S.Q.; Liu, X. Experimental study on the dynamic characteristics of a new long-short pile composite foundation under long-term trainload. Shock. Vib. 2023, 2023, 7032053. [Google Scholar]
- Zhou, S.; Zhang, H.; Wang, R.; Li, D. Model test of bearing characteristics of fly ash foundation under cyclic loading. Processes 2022, 10, 1117. [Google Scholar] [CrossRef]
- Gao, J.; Xie, X.; Wang, J.; Liu, L.; Zhang, W. Numerical and theoretical analysis of geosynthetic encased stone column composite foundation under cyclic loading. Lat. Am. J. Solids Struct. 2022, 19, e434. [Google Scholar] [CrossRef]
- Chen, J.; Tang, T.; Zhao, W.; Yu, J. Field test study on concrete core sand and gravel pile composite foundation. Chin. J. Geotech. Eng. 2007, 07, 957–962. [Google Scholar]
- Tang, T.; Zhao, W.; Chen, J.; Cheng, W. Experimental study on deformation and bearing capacity of concrete core sand pile composite foundation under load of high fill embankment. Chin. J. Geotech. Eng. 2010, 32, 1829–1836. [Google Scholar]
- Guan, Y.; Yu, J. Improving soft soil using concrete-cored sand-gravel pile composition foundation. In Geotechnical Engineering for Disaster Mitigation and Rehabilitation, Proceedings of the 2nd International Conference GEDMAR08, Nanjing, China, 30 May–2 June 2008; Springer: Berlin/Heidelberg, Germany, 2008. [Google Scholar]
- Yu, J.; Cai, Y.; Qi, Z.; Guan, Y.; Liu, S.; Tu, B. Analytical analysis and field test investigation of consolidation for CCSG pile composite foundation in soft clay. J. Appl. Math. 2013, 10, 1155. [Google Scholar] [CrossRef]
- Chen, S.; Guan, Y.; Dai, J.; Zhao, W. Field experimental and numerical studies on performance of concrete-cored gravel column-supported embankments. Int. J. Geomech. 2023, 23, 04023026. [Google Scholar] [CrossRef]
- Zhang, Q.; Zhang, Z.; Ye, G.; Xu, Y.; Chan, A.P. Plane strain simplified analysis of consolidation of a foundation penetrated by concrete-cored gravel columns. Int. J. Geomech. 2023, 23, 04022311. [Google Scholar] [CrossRef]
- Jin, D. Consolidation analysis of composite ground improved by CCSG columns with short core under time-dependent loading. Int. J. Res. Eng. Sci. 2023, 11, 246–258. [Google Scholar]
- Gu, M. Three-Dimensional Discrete Element and Model Experimental Study on the Bearing Deformation Characteristics of Composite Foundation with Reinforced Rubble Pile; Hunan University: Changsha, China, 2017. [Google Scholar]
- Qiu, J. Research on Bearing Deformation Mechanism of Composite Foundation with Reinforced Rubble Pile under Traffic Load; Guangzhou University: Guangzhou, China, 2022. [Google Scholar]
Parameter | Soil |
---|---|
Particle density (kg/m3) | 2650 |
Particle normal stiffness (N/m) | 4 × 104 |
Particle shear stiffness (N/m) | 4 × 104 |
Contact bond normal strength (N) | 3.2 |
Contact bond tangential strength (N) | 3.2 |
Particle friction factor | 0.25 |
Soil Horizon | Depth (mm) | Normal Strength (N) | Tangential Strength (N) |
---|---|---|---|
First floor | 0–200 | 3.2 | 3.2 |
Second floor | 200–400 | 3.4 | 3.4 |
Third floor | 400–600 | 3.65 | 3.65 |
Fourth floor | 600–800 | 3.95 | 3.95 |
Fifth floor | 800–100 | 4.2 | 4.2 |
Hard layer | 1000–1500 | 4.5 | 4.5 |
Parameter | Sand–Gravel |
---|---|
Particle density (kg/m3) | 2500 |
Particle normal stiffness (N/m) | 6 × 107 |
Particle shear stiffness (N/m) | 1 × 107 |
Particle friction factor | 0.8 |
Parameter | Concrete |
---|---|
Particle density (kg/m3) | 2500 |
Elastic modulus (GPa) | 10 |
Stiffness ratio | 1.0 |
Parallel bond normal strength (N/m3) | 2.5 × 107 |
Parallel bond tangential strength (N/m3) | 1.7 × 107 |
Particle friction factor | 0.5 |
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Ma, B.; Tang, W.; Lan, T.; Deng, X.; Du, B. Three-Dimensional Discrete Element Analysis of Bearing Characteristics of Concrete–Cored Sand–Gravel Pile Composite Foundation under Cyclic Dynamic Load. Buildings 2024, 14, 1660. https://doi.org/10.3390/buildings14061660
Ma B, Tang W, Lan T, Deng X, Du B. Three-Dimensional Discrete Element Analysis of Bearing Characteristics of Concrete–Cored Sand–Gravel Pile Composite Foundation under Cyclic Dynamic Load. Buildings. 2024; 14(6):1660. https://doi.org/10.3390/buildings14061660
Chicago/Turabian StyleMa, Binhui, Wenbiao Tang, Tian Lan, Xu Deng, and Bicheng Du. 2024. "Three-Dimensional Discrete Element Analysis of Bearing Characteristics of Concrete–Cored Sand–Gravel Pile Composite Foundation under Cyclic Dynamic Load" Buildings 14, no. 6: 1660. https://doi.org/10.3390/buildings14061660