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ghanbari, ali, Yoosefi Taleghani, Mahdi. (1400). A New Correlation to Estimate Bearing Capacity of Micropile Groups. نشریه مهندسی عمران امیرکبیر, 5(4), 685-700. doi: 10.22060/ajce.2022.20386.5772
ali ghanbari; Mahdi Yoosefi Taleghani. "A New Correlation to Estimate Bearing Capacity of Micropile Groups". نشریه مهندسی عمران امیرکبیر, 5, 4, 1400, 685-700. doi: 10.22060/ajce.2022.20386.5772
ghanbari, ali, Yoosefi Taleghani, Mahdi. (1400). 'A New Correlation to Estimate Bearing Capacity of Micropile Groups', نشریه مهندسی عمران امیرکبیر, 5(4), pp. 685-700. doi: 10.22060/ajce.2022.20386.5772
ghanbari, ali, Yoosefi Taleghani, Mahdi. A New Correlation to Estimate Bearing Capacity of Micropile Groups. نشریه مهندسی عمران امیرکبیر, 1400; 5(4): 685-700. doi: 10.22060/ajce.2022.20386.5772

A New Correlation to Estimate Bearing Capacity of Micropile Groups

AUT Journal of Civil Engineering
مقاله 10، دوره 5، شماره 4، اسفند 2021، صفحه 685-700    اصل مقاله (1.18 M)
نوع مقاله: Research Article
شناسه دیجیتال (DOI): 10.22060/ajce.2022.20386.5772
نویسندگان
ali ghanbari؛ Mahdi Yoosefi Taleghani*
Faculty of Engineering, Kharazmi University, Tehran, Iran.
چکیده
Most of the recent studies that have focused on the micropile group have been limited to a specific soil type. However, the bearing capacity of micropile groups has not been considered in any of these studies. This study concerned three-dimensional numerical modeling of loose sand, medium sand, silty clay, and soft clay improved by the micropile group. The bearing capacity of the micropile group was estimated by 3D numerical modeling. The micropile group was modeled using spacing to diameter ratio (S/D) and the ratio of micropile length to cap width of micropile (L/B) in soil. Despite the use of only the shear failure criterion in the FHWA Code, the allowable settlement criterion was also considered in this study. A novel approach was presented to estimate the bearing capacity of the micropile group in which a new concept known as “unit length bearing capacity” has been used for the first time. The results demonstrated that in all four soils studied, the unit length bearing capacity of the group will decrease with increasing micropile length. In addition, the settlement of the micropile group in all four soils will decrease with increasing micropile length. The unit length bearing capacity of the micropile group and the overall bearing capacity of the micropile group in all four soils will decrease with an increasing spacing of micropiles. Of course, with increasing micropile length, the unit length bearing capacity will decrease at a slower rate than the overall bearing capacity. According to the simulation results, a punching failure occurred in the micropile group. 
کلیدواژه‌ها
Micropile group؛ Failure mechanism؛ Load-settlement curve؛ MIDAS؛ Unit length bearing capacity
مراجع
  1. R. Thompson, Shear strength and elastic properties of lime-soil mixtures, 139: 1-14, Highway Research Record, Washington D.C., 1966.
  2. K. Mitchell, The properties of cement-stabilized soils, 365–404, Proceeding of Residential Workshop on Materials and Methods For Low-Cost Road and Rail and Reclamation Works, Australia, 1976.
  3. G. Meyerhof, Bearing Capacity and Settlement of Pile Foundations, Journal of Geotechnical and Geoenvironmental Engineering, 102(3) (1976) 197-228.
  4. S. Vesic, Design of Pile Foundations, Transportation Research Board, Washington DC, 1977.
  5. Terzaghi, R. B. Peck, G. Mesri, Soil Mechanics in Engineering Practice, John Wiley, New York, 1996.
  6. L. Babu, B. S. Murthy, D. S. Murthy, M. S. Nataraj, Bearing Capacity Improvement Using Micropiles: A Case Study, GeoSupport Conference, 2004.
  7. Haeri, A. Hamidi, N. Tabatabaee, The Effect of Gypsum Cementation on the Mechanical Behavior of Gravely Sands, Geotechnical Testing Journal, 28(4) (2005) 380-390.
  8. J. Sabatini, B. Tanyu, T. Armour, P. Groneck, J. Keeley, Micropile design and construction, FHWA-NHI-05-039, US Department of Transportation Federal Highway Administration, Washington DC, 2005.
  9. Sadek, I. Shahrour, H. Mroueh, Influence of micropile inclination on the performance of a micropile network, Proceedings of the Institution of Civil Engineers - Ground Improvement, 10(4) (2006) 165-172.
  10. Muhunthan, F. Sariosseiri, Interpretation of Geotechnical Properties of Cement Treated Soils, Research Report WA-RD 715.1 Pullman Washington State University, Washington, 2008.
  11. K. Datta, Seismic Analysis of Structures, John Wiley & Sons, Delhi, 2010.
  12. Y. Abd Elaziz, M. H. El Naggar, Group behavior of hollow-bar micropiles in cohesive soils, Canadian Geotechnical Journal, 51 (2014) 1139-1150.
  13. Amini, A. Hamidi, E. Asghari, Shear strength–dilation characteristics of cemented sand–gravel mixtures, International Journal of Geotechnical Engineering, 8(4) (2014), 406-413.
  14. Abdollahi, A. Mortezaei, A new expression for determining the bending stiffness of circular micropile groups, Soil Dynamics and Earthquake Engineering, 77 (2015) 58-70.
  15. P. Matos, P. L. Pinto, C. S. Rebelo, L. S. Silva, M. Veljkovic, Cyclic Performance of Single and Group Micropiles on Loose Sand, IFCEE, 2015.
  16. M. Alnuaim, H. El Naggar, H. El Naggar, Numerical investigation of the performance of micropiled rafts in sand. Computers and Geotechnics, 77 (2016) 91-105.
  17. Ghadimi, A. Ghanbari, M. Sabermahani, M. Yazdani, Effect of soil type on nail pull-out resistance, Proceedings of the Institution of Civil Engineers - Ground Improvement, 170(2) (2017) 81-88.
  18. Rezazadeh, A. Eslami, Empirical methods for determining shaft bearing capacity of semi-deep foundations socketed in rocks, Journal of Rock Mechanics and Geotechnical Engineering, 9(6) (2017) 1140-1151.
  19. M. Alnuaim, H. El Naggar, H. El Naggar, Performance of micropiled rafts in clay: Numerical investigation. Computers and Geotechnics, 99 (2018) 42-54.
  20. Khanmohammadi, K. Fakharian, Evaluation of performance of piled-raft foundations on soft clay: A case study, Geomechanics and Engineering, 14(1) (2018) 43-50.
  21. Ko, J. Cho, S. Jeong, Analysis of load sharing characteristics for a piled raft foundation, Geomechanics and Engineering, 16(4) (2018) 449-461.
  22. Kyung, J. Lee, Interpretative Analysis of Lateral Load–Carrying Behavior and Design Model for Inclined Single and Group Micropiles, Journal of Geotechnical and Geoenvironmental Engineering, 144(1) (2018).
  23. Kyung, J. Lee, Uplift Load-Carrying Capacity of Single and Group Micropiles Installed with Inclined Conditions, Journal of Geotechnical and Geoenvironmental Engineering, 143(8) (2018).
  24. C. Verbrugge, C. Schroeder, Geotechnical Correlations for Soils and Rocks, John Wiley & Sons, 2018.
  25. Sharma, S. Sarkar, Z. Hussain, A Study of Parameters Influencing Efficiency of Micropile Groups, Ground Improvement Techniques and Geosynthetics, 14 (2019) 11-18.
  26. M. Schultz, S. Jafroudi, T. V. Nguyen, Verification Load Testing of Micropiles under Combined Axial and Lateral Forces, Eighth International Conference on Case Histories in Geotechnical Engineering, 2019.
  27. Al-abboodi, T. T. Sabbagh, O. Al-salih, Response of passively loaded pile groups – an experimental study, Geomechanics and Engineering, 20(4) (2020) 333-343.
  28. Abdlrahem, H. El Naggar, Axial performance of micropile groups in cohesionless soil from full-scale tests, Canadian Geotechnical Journal, 57 (2020).
  29. Bayesteh, M. Fakharnia, Numerical simulation load test on hollow-bar micropiles by considering grouting method, Geotechnical Engineering, (2020).
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