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Numerical investigation of behavior of energy piles in saturated fine-grained soil | ||
| AUT Journal of Civil Engineering | ||
| دوره 8، شماره 2، 2024، صفحه 145-160 اصل مقاله (1.28 M) | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22060/ajce.2025.23636.5891 | ||
| نویسندگان | ||
| Mohammad Amir Kiani Fordoei؛ Mahdi khodaparast* ؛ Alireza Ghadamgahi | ||
| Department of Civil Engineering, Faculty of Engineering, University of Qom, Qom, Iran | ||
| چکیده | ||
| The current study aimed to examine the behavior of energy piles in saturated fine-grained soils using the finite element method. The proposed thermo-hydro-mechanical model could demonstrate the energy pile behavior in most practical conditions such as under thermal, mechanical, or thermomechanical loading. Based on the obtained results from this study, the thermal expansion of the pile and temperature variation in the soil affect vertical effective stress in the soil. Since vertical effective stress is an important parameter in estimating bearing capacity and consolidation settlement of the bearing system and controls the stability of the superstructure, the effects of thermal loading on vertical effective stress of soil and consequently, on the bearing capacity of pile needs to be investigated accurately. For this purpose, a comprehensive parametric study was accomplished. Based on the results, the elastic modulus, Poisson ratio, thermal expansion coefficient of solid grains, void ratio, and coefficient of permeability of fine-grained soil were the most important and effective parameters on bearing capacity and consolidation settlement of energy piles in saturated conditions. Based on the results, the elasticity modulus of the soil has a significant effect on reducing the vertical effective stress of the soil by up to 40 percent of the initial in-situ stress. | ||
| کلیدواژهها | ||
| Energy Piles؛ Finite Element؛ Thermo-hydro-mechanical Behavior of Soil؛ Fine-grained Soils؛ Thermomechanical Loading | ||
| مراجع | ||
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[1] G.A. Akrouch, M. Sánchez, J.-L. Briaud, Thermo-mechanical behavior of energy piles in high plasticity clays, Acta Geotechnica, 9 (2014) 399-412.
[2] P. Bourne-Webb, B. Amatya, K. Soga, T. Amis, C. Davidson, P. Payne, Energy pile test at Lambeth College, London: geotechnical and thermodynamic aspects of pile response to heat cycles, Géotechnique, 59(3) (2009) 237-248.
[3] L. Laloui, M. Nuth, L. Vulliet, Experimental and numerical investigations of the behavior of a heat exchanger pile, International journal for numerical and analytical methods in geomechanics, 30(8) (2006) 763-781.
[4] J.K. Mitchell, K. Soga, Fundamentals of soil behavior, John Wiley & Sons New York, 2005.
[5] C. Zhou, J. Xu, C.W.W. Ng, Effects of temperature and suction on secant shear modulus of unsaturated soil, Géotechnique Letters, 5(3) (2015) 123-128.
[6] A. Edalat, M. Khodaparast, A.M. Rajabi, Scenarios to control land subsidence using numerical modeling of groundwater exploitation: Aliabad plain (in Iran) as a case study, Environmental Earth Sciences, 79(21) (2020) 494.
[7] H.M. Abuel-Naga, D.T. Bergado, A. Bouazza, Thermally induced volume change and excess pore water pressure of soft Bangkok clay, Engineering Geology, 89(1-2) (2007) 144-154.
[8] B. Bai, Z. Su, Thermal responses of saturated silty clay during repeated heating–cooling processes, Transport in porous media, 93 (2012) 1-11.
[9] C. Cekerevac, L. Laloui, Experimental study of thermal effects on the mechanical behavior of a clay, International journal for numerical and analytical methods in geomechanics, 28(3) (2004) 209-228.
[10] R. Fuentes, N. Pinyol, E. Alonso, Effect of temperature-induced excess porewater pressures on the shaft bearing capacity of geothermal piles, Geomechanics for Energy and the Environment, 8 (2016) 30-37.
[11] B. Amatya, K. Soga, P. Bourne-Webb, T. Amis, L. Laloui, Thermo-mechanical behavior of energy piles, Géotechnique, 62(6) (2012) 503-519.
[12] A. Di Donna, L. Laloui, Numerical analysis of the geotechnical behavior of energy piles, International journal for numerical and analytical methods in geomechanics, 39(8) (2015) 861-888.
[13] M. Khodaparast, M. Kiani, H. Bayesteh, Numerical study of bearing capacity and consolidation settlement of energy piles in fine-grained soils, in: Energy Geotechnics, Proceedings of the 1st International Conference on Energy Geotechnics, 2016, pp. 57.
[14] C.W.W. Ng, C. Shi, A. Gunawan, L. Laloui, Centrifuge modeling of energy piles subjected to heating and cooling cycles in clay, Geotechnique letters, 4(4) (2014) 310-316.
[15] A. Vieira, J.R. Maranha, Thermoplastic analysis of a thermoactive pile in a normally consolidated clay, International Journal of Geomechanics, 17(1) (2017) 04016030.
[16] V.T. Nguyen, N. Wu, Y. Gan, J.-M. Pereira, A.M. Tang, Long-term thermo-mechanical behavior of energy piles in clay, Environmental Geotechnics, 7(4) (2019) 237-248.
[17] E. Ravera, M. Sutman, L. Laloui, Analysis of the interaction factor method for energy pile groups with slab, Computers and Geotechnics, 119 (2020) 103294.
[18] C. Garbellini, L. Laloui, Thermal stress analysis of energy piles, Géotechnique, 71(3) (2021) 260-271.
[19] L. Pourfakhrian, H. Bayesteh, Effect of slab stiffness on the geotechnical performance of energy piled-raft foundation under thermo-mechanical loads, European Journal of Environmental and Civil Engineering, 26(9) (2022) 3681-3705.
[20] B. Heidari, A.A. Garakani, S.M. Jozani, P.H. Tari, Energy piles under lateral loading: analytical and numerical investigations, Renewable Energy, 182 (2022) 172-191.
[21] S. Jeong, H. Lim, J.K. Lee, J. Kim, Thermally induced mechanical response of energy piles in axially loaded pile groups, Applied Thermal Engineering, 71(1) (2014) 608-615.
[22] M.P. Ahola, Thermo-hydro-mechanical Coupled Modeling: Big-Ben Experiment, TC3: DECOVALEX-Phase III, Center for Nuclear Waste Regulatory Analyses, 1994.
[23] K. Hibbitt, Sorensen, ABAQUS/CAE User's Manual, Dassault Systems Simulia Corp., Providence, RI, USA, 2016.
[24] N. Batini, A.F.R. Loria, P. Conti, D. Testi, W. Grassi, L. Laloui, Energy and geotechnical behavior of energy piles for different design solutions, Applied Thermal Engineering, 86 (2015) 199-213.
[25] R.A. Rajapakse, Pile design and construction rules of thumb, Butterworth-Heinemann, 2016. | ||
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آمار تعداد مشاهده مقاله: 255 تعداد دریافت فایل اصل مقاله: 296 |
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