Influence of constructive solutions on the stiffness characteristics of the rammed monolithic reinforced concrete cone-shaped piles with side and bottom forms from crushed stones

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Relevance. The article discusses the design solutions of a new pile structure, which is a monolithic reinforced concrete cone-shaped pile, enclosed in a crushed stone shell and resting on a spherical crushed stone broadening. In the course of a numerical study, carried out using the finite element method, the influence of the geometric parameters of the crushed stone formations of the pile foundation, such as the wall thickness of the crushed stone shell and the radius of the crushed stone broadening, on its bearing capacity was revealed. The aim of the study is to perform a comparative numerical analysis of the stressstrain state of a pile structure with different design solutions, operating as part of a soil massif. Materials and methods. Numerical static analysis of the structure of a monolithic reinforced concrete pile foundation operating in a soil massif was carried out using a spatial finite element model in the CAE-class software package. The article presents the results of a numerical analysis of the stress-strain state of a rammed monolithic reinforced concrete cone-shaped pile with different wall thicknesses of the crushed stone shell and different diameters of the lower spherical crushed stone broadening. The analysis showed that changes in the specified geometric parameters of the pile foundation have a significant impact on its bearing capacity under external forces. The rational choice of these parameters allows you to economically use the concrete mixture and reinforcing rods intended for the manufacture of monolithic reinforced concrete rammed piles, which, in turn, leads to a decrease in financial costs for the manufacture of the pile foundation and the entire building as a whole. The next research is supposed to carry out a comparative analysis of the numerical results with experimental data obtained in laboratory and field conditions.

About the authors

Elvira R. Kuzhakhmetova

Moscow State University of Civil Engineering (National Research University)

Author for correspondence.
ORCID iD: 0000-0002-0907-786X

engineer, senior lecturer of the Department of Reinforced Concrete Structures

26 Yaroslavskoye Shosse, Moscow, 129337, Russian Federation


  1. Baykov V.N., Sigalov E.E. Reinforced concrete structures. General course. Moscow: Stroyizdat Publ.; 1991. (In Russ.)
  2. Veselov V.A. Design of foundations and foundations (fundamentals of theory and examples of calculation). Moscow: Stroyizdat Publ.; 1990. (In Russ.)
  3. Sapozhnikov A.I., Kuzhakhmetova E.R. Deep immersion and deformation calculation of a monolithic pile-shell of large diameter. Proceedings of the International Scientific Conference of Scientific and Pedagogical Workers of Astrakhan State Technical University, Dedicated to the 85th Anniversary from the Basis of the University. Astrakhan: Astrakhan State Technical University; 2015. p. 191–192. (In Russ.)
  4. Kalnitskiy A.A., Peshkovskiy L.N. Calculation and design of reinforced concrete foundations of civil and industrial buildings and structures. Moscow: Vysshaya Shkola; 1974. (In Russ.)
  5. Obodovsky A.A. Design of pile foundations. Moscow: Stroyizdat Publ.; 1977. (In Russ.)
  6. Trofimenkov Yu.G., Obodovskiy A.A. Pile foundations for residential and industrial buildings. Moscow: Stroyizdat Publ.; 1970. (In Russ.)
  7. Sotnikov S.N., Simagin V.G., Vershinin V.P. Design and construction of foundations near existing buildings. Moscow: Stroyizdat Publ.; 1986. (In Russ.)
  8. Kuzhakhmetova E.R. Dipping, calculation and construction of the monolithic reinforced concrete pile of the conical form. Scientific Review. Technical Science. 2017;(2):57–64.
  9. Kong G.-Q., Yang Q., Liu H.L., Liang R.Y. Numerical study of a new belled wedge pile type under different loading modes. European Journal of Environmental and Civil Engineering. 2013;17:37–41.
  10. Khan M.K., Naggar M.H.E., Elkasabgy M. Compression testing and analysis of drilled concrete tapered piles in cohesive-frictional soil. Canadian Geotechnical Journal. 2008;45(3):377–392.
  11. Rybnikov A.M. Experimental investigations of bearing capacity of bored-cast-in-place tapered piles. Soil Mechanics and Foundation Engineering. 1990;27(2):48–52.
  12. Naggar M.H.E., Wei J.Q. Axial capacity of tapered piles established from model tests. Canadian Geotechnical Journal. 1999;36(6):1185–1194.
  13. Naggar M.H.E., Sakr M. Evaluation of axial performance of tapered piles from centrifuge tests. Canadian Geotechnical Journal. 2000;37(6):1295–1308.
  14. Rybnikova I.А., Rybnikov A.M. Analysis of the field tests results of bored conical piles under the action of various types of loads. Bulletin of BSTU named after V.G. Shukhov. 2018;3(3):24–29. (In Russ.)
  15. Rybnikova I.A., Rybnikov А.М. Analysis of the results of tensometric studies of natural bored conical piles. Bulletin of BSTU named after V.G. Shukhov. 2020;(2):44–55. (In Russ.)
  16. Cherniavsky D.A. Assessment of the influence of the strength characteristics of clay soils on the bearing capacity of single conical СFA piles. Bulletin of PNRPU. Construction and Architecture. 2018;9(4):69–79. (In Russ.)
  17. Kuzhakhmetova E.R. Research of stress-deformed state of the rammed monolithic reinforced concrete coneshaped piles with side and bottom forms from crushed stones. Structural Mechanics of Engineering Constructions and Buildings. 2021;17(4):335–356. (In Russ.).
  18. Perich A.I. Economic foundations of low-rise buildings and manor houses. Moscow: GUP TSPP Publ.; 2002. (In Russ).
  19. Zhukov N.V. Construction of pile foundations for instrudial farm buildings. Soil Mechanics and Foundation Engineering. 1968;5(4): 251–254.
  20. Kuzhakhmetova E.R., Sapozhnikov A.I. Comparative analysis of long and short piles with horizontal uploading. Building Materials, Equipment, Technologies of the XXI Century. 2015;(5–6):30–34. (In Russ.)
  21. Kuzhakhmetova E.R. Modeling of a piled foundation in a Femap with NX Nastran. Structural Mechanics of Engineering Constructions and Buildings. 2020;16(4):250–260. (In Russ.)
  22. Zienkiewich O.C. The finite element method in engineering science. Moscow: Mir Publ.; 1975. (In Russ.)
  23. Budhu M. Soil mechanics and foundations. 3rd ed. John Wiley & Sons, Inc.; 2010.
  24. Rychkov S.P. Structural modeling in Femap with NX Nastran. Moscow: DMK Press; 2013. (In Russ.)
  25. Shimkovich D.G. Structural analysis in MSC/NASTRAN for Windows. Moscow: DMK Press; 2003. (In Russ.)

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