In the ever-evolving landscape of geotechnical engineering, a groundbreaking study has emerged that could significantly impact the energy sector’s foundation design and construction practices. Researchers from the College of Geology and Mining Engineering at Xinjiang University, led by CHEN Yuanfeng, have delved into the time-dependent behavior of rock-socketed pile groups, offering insights that could revolutionize how we approach deep foundations in challenging geological conditions.
The study, published in ‘Yantu gongcheng xuebao’ (translated to English as ‘Chinese Journal of Geotechnical Engineering’), employs a sophisticated finite element method (FEM) and boundary element method (BEM) coupling approach to model the complex interactions between rock-socketed pile groups and the surrounding saturated rock-soil mass. This method allows for a more accurate representation of the viscoelastic characteristics of the materials involved.
“Understanding the time-dependent behavior of these structures is crucial for ensuring the long-term stability and safety of energy infrastructure,” said CHEN Yuanfeng, the lead author of the study. The research introduces the fractional Merchant model and the fractional Poyting-Thomson model to describe the viscoelastic behavior of the overlying soil layer and saturated soft rock, respectively. These models provide a more nuanced understanding of how these materials deform over time under load.
The study’s findings reveal that the deformation of the pile cap and the top reaction force of each pile in a rock-socketed pile group gradually increase over time and eventually stabilize. This behavior is influenced by the fractional order and viscoelastic parameters of the rock mass. “By comprehending these factors, engineers can design more efficient and cost-effective foundations for energy sector projects, particularly in areas with complex geological conditions,” added CHEN.
The implications for the energy sector are substantial. As the demand for renewable energy sources grows, so does the need for stable and reliable foundations for wind turbines, solar farms, and other energy infrastructure. The insights gained from this research can help engineers optimize foundation designs, reducing material costs and construction time while ensuring the long-term stability of these structures.
Moreover, the study’s innovative approach to modeling the time-dependent behavior of rock-socketed pile groups sets a new standard for geotechnical engineering research. By combining advanced numerical methods with sophisticated material models, the researchers have paved the way for future studies to explore similar behaviors in other types of foundations and geological conditions.
As the energy sector continues to evolve, the need for robust and innovative foundation designs will only grow. This research not only addresses current challenges but also anticipates future needs, making it a valuable contribution to the field of geotechnical engineering. The study’s findings are a testament to the power of interdisciplinary research and the importance of understanding the complex interactions between structures and the ground they rest upon.