Experimental research programme on the behaviour of a pile group in a homogeneous base

Introduction. A programme of experimental research based on numerical modelling of pile group behaviour in a homogeneous sandy foundation is considered. The relevance of this work is due to the need to improve the reliability and safety of pile foundations, which are widely used in modern construction. The research is aimed at eliminating the existing gaps in predicting the interaction between piles and homogeneous soil. Within the scope of this study, a comprehensive experimental programme was developed and tested, including both modelling and field tests. The results obtained allowed us to propose new approaches to the calculation of pile groups, which has significant scientific and practical value for the construction industry.

Materials and methods. Data from scientific publications, regulatory documents, project materials, and experimental results were used. Methods of systematic analysis, modelling, as well as experimental and statistical approaches, were applied. These methods enabled the acquisition of new data and adjustments to the calculation methods for pile foundations.

Results. A numerical model for experimental research was developed, various calculation methods for pile foundations were analyzed, a test stand model was created, and a step-by-step experimental programme was designed.

Conclusions. The research results on the behaviour of pile groups in a homogeneous foundation have high scientific and practical value. The developed mathematical model and experimental data allowed to describe more accurately the distribution of loads and deformations in the pile group, which is a significant contribution to the theory of calculation of pile foundations. The obtained results confirm the necessity and importance of revising the existing methods of pile foundations calculation. Their introduction into construction practice and educational programmes will improve the reliability and efficiency of construction, as well as create a basis for further research in this field.

1. Qi Z., Wei T., Wang C., Wang F., Wang Y., Wang J. et al. Numerical Study on Pile Group Effect and Carrying Capacity of Four-Barreled Suction Pile Foundation under V-H-M Combined Loading Conditions. Processes. 2022; 10:2459. DOI: 10.3390/pr10112459

2. Ma B., Cai K., Guo J., Li Z., Hu Z., Chen Q. et al. Theoretical Analysis on the Vertical Bearing Characteristics of Pile Foundations Containing Sediment Defects. Lithosphere. 2022; 2021(Special 1):9150985. DOI: 10.2113/2022/9150985

3. Shuliatʹev O.A. Basic principles of calculation and design of slab and pile foundations for high-rise buildings : doctor’s degree dissertation. 2019; 352. (rus.).

4. Sall O.A., Sarr D., Ba M., Tchakou A.E. Numerical Modeling of the Behavior of a Pile Foundation under Axial Load with Ansys. American Journal of Materials Science and Engineering. 2019; 7(1):12-20. DOI: 10.12691/ajmse-7-1-3

5. Tiwari A., Dindorkar N., Kaur S. Bibliometric and Knowledge Network of Global Research on Pile Foundations : a Review of Recent Developments. Sustainability. 2023; 15(14):11108. DOI: 10.3390/su151411108

6. Sobolev E.S., Berezin E.K., Kechina T.V. Comparative analysis of the dynamic stability of a multistorey building with different base arrangements. Journal of Physics : Conference Series. 2021; 1928(1):012018. DOI: 10.1088/1742-6596/1928/1/012018

7. Nuzhdin L.V., Mikhaylov V.S. Field numerical analysis at the stage of dynamic impacts. Construction and Geotechnics. 2023; 14(2):22-36. DOI: 10.15593/2224-9826/2023.2.02

8. Chen K. On the Influence of Pile Foundation Settlement of Existing High-Rise Buildings on the Surrounding Buildings. Advances in Civil Engineering. 2021; 2021(1). DOI: 10.1155/2021/5560112

9. Bokov I.A., Fedorovski V.G. Mutual influence of piles through the soil: comparison of analytical and numerical estimates. Industrial and Civil Construction. 2016; 10:26-30.

10. Tan Y.C., Chow C.M., Gue S.S. Piled raft with different pile length for medium-rise buildings on very soft clay. Proceedings of the sixteenth International Conference on Soil Mechanics and Geotechnical Engineering. 2005; 2045-2049.

11. Huded P.M., Dash S.R. Pile foundation in alternate layered liquefiable and non-liquefiable soil deposits subjected to earthquake loading. Earthquake Engineering and Engineering Vibration. 2024; 23(2):359-376. DOI: 10.1007/s11803-024-2241-0

12. Pushkarev I.A., Musina E.M., Tratkanova A.A. Software technologies as a means of increasing the productivity of design and optimization of structures in the field of structural mechanics. Construction and Geotechnics. 2024; 15(1):17-32. DOI: 10.15593/2224-9826/2024.1.02 (rus.).

13. Skibin G.M., Derekhovskii V.M. The effectiveness of using the bearing capacity of piles in the formation of the pile field of the slab pile foundation of a 21-storey apartment building. Construction and Geotechnics. 2023; 14(3):24-36. DOI: 10.15593/2224-9826/2023.3.03 (rus.).

14. Espinoza J.P., Tamayo J.P. Numerical simulation and parametric study of pile groups under lateral loads. Journal of the Brazilian Society of Mechanical Sciences and Engineering. 2023; 45(7). DOI: 10.1007/s40430-023-04285-9

15. Skibin G.M., Chutchenko S.G. Valuation of the effectiveness of the parameters of pile foundations at the design stage. Soil mechanics in geotechnics and foundation engineering : materials of the scientific and technical conference. 2022; 224-228. (rus.).

16. Nuzhdin L.V., Mikhaylov V.S. Numerical modelling of pile foundations using SCAD office structural analysis software. Construction and Geotechnics. 2018; 9(1):5-18. DOI: 10.15593/2224-9826/2018.1.01 (rus.).

17. Fedorovskii V.G., Bobyr G.A., Bokov I.A., Ilʹin S.V. Application of finite element method to the geotechnical ULS analysis. Bulletin SRC of Construction. 2019; 20(1):102-112. (rus.).

18. Bull J.W. Numerical analysis and modelling in geomechanics. Boca Raton, CRC Press, 2014; 397.

19. Bokov I.A. Calculation of the settlement of pile foundations with piles of various lengths : abstract of Ph. D. thesis. Moscow, 2020; 148. (rus.).

20. Liu X., Cheng G., Wang B., Lin S. Optimum Design of Pile Foundation by Automatic Grouping Genetic Algorithms. ISRN Civil Engineering. 2012; 2012:1-16. DOI: 10.5402/2012/678329