In the intricate dance of construction and geotechnical engineering, a recent study has shed light on the delicate balance between mound removal and tunnel stability, offering valuable insights for the energy sector and beyond. Led by ZHANG Jiafeng of the Shanghai CAAC New Era Airport Design & Research Institute Co., Ltd., and a team from Tongji University, the research delves into the complexities of soil and tunnel behavior during adjacent mound removal at a southeastern coastal airport.
The study, published in *Yantu gongcheng xuebao* (translated to English as *Rock and Soil Engineering*), employed finite element software to investigate the additional deformations of tunnels and surrounding soils. By simulating eight different unloading conditions, the team uncovered critical principles governing tunnel displacement and soil deformation.
“Our findings reveal that the maximum vertical displacement in the unloading area occurs at the center of the surface,” explained ZHANG Jiafeng. “During the unloading process, the vertical displacement of the soils consistently exceeds their horizontal displacement.” This insight is crucial for understanding the dynamics of soil behavior during mound removal, particularly in areas with significant underground infrastructure.
The research also highlighted the impact of mound removal on tunnel structures. “The process causes uplift and curvature changes in the tunnel,” noted YU Jian, a co-author from Tongji University. “The maximum horizontal and vertical displacements of the tunnel are observed at the location closest to the mound.” These findings underscore the importance of careful planning and monitoring during such operations to mitigate potential risks.
For the energy sector, where underground tunnels and pipelines are integral to operations, these insights are invaluable. The study’s principles can guide the development of optimal construction solutions, ensuring the safety and integrity of underground infrastructure during adjacent land excavations. As the demand for energy continues to grow, the ability to predict and manage soil and tunnel deformations becomes increasingly critical.
The research not only provides a deeper understanding of the geotechnical challenges associated with mound removal but also paves the way for more informed decision-making in construction and infrastructure projects. By leveraging the findings from this study, engineers and planners can develop strategies that minimize risks and maximize efficiency, ultimately contributing to the sustainable development of the energy sector.
As the field of geotechnical engineering continues to evolve, the work of ZHANG Jiafeng and his team serves as a testament to the power of advanced modeling and simulation techniques. Their research not only advances our understanding of soil and tunnel behavior but also sets the stage for future innovations in the field. With the insights gained from this study, the industry is better equipped to tackle the challenges of tomorrow, ensuring the safe and efficient operation of underground infrastructure for years to come.