The influence of single-layer and double-layer bases vertical soil pressing on the bearing capacity of piles
| Autor: | G. I Rybak, Maxim Stepanov, Mikh. A Stepanov, K. R Dzhabrailova |
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| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | PNRPU Construction and Architecture Bulletin. 10:5-16 |
| ISSN: | 2305-2724 2224-9826 |
| DOI: | 10.15593/2224-9826/2019.1.01 |
| Popis: | The article is proposed the increasing of pile foundations load-bearing capacity. In that work authors deal with problems of quantitative estimation of the transformed soil layer residual deformations and stresses, which are the result of additional vertical pressure applying on the soil base, prior to loading the pile foundation. Based on the results of analytical and numerical calculations of the single-layer and two-layer soil base vertical crimping, parameters of the bearing capacity growth are established. Two-layered soil base is more complex and more close to reality system. The article considers the stress-strain state generation and piles bearing capacity increments at different pressures of crimping in the range of basic building pressures from 50 to 150 kPa. It was considered in plane strain and spatial model. Research presents the results of the mechanical soil properties influence its preliminary crimping influence on the pile bearing capacity in various engineering and geological conditions. Increasing of pile bearing capacity depends mainly on the deformation soil base characteristics. The article discusses about the character of horizontal soil movements during and after crimping process and changes in the soil base stressed state along the pile stem, which affects their interaction. The article presents the pile bearing capacity increment in single-layer and double-layer soil base crimping cases. On the example a 12-storey building construction was established that the soil base crimping of combined foundation using could reduction the subterranean building part erection cost by 21 % in comparison with the traditional slab-pile foundation. |
| Databáze: | OpenAIRE |
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