In the realm of urban construction, where the challenges of tunneling intersect with the complexities of geological conditions, a recent study sheds light on a critical aspect of tunnel excavation: the optimal distance between technological sequences. Conducted in the Kobilja Glava tunnel, a pivotal project meant to enhance connectivity between Vogošća and Sarajevo, this research presents findings that could significantly influence construction practices, safety measures, and financial outcomes in the industry.
The study, led by Ekrem Bektašević from PPG d.o.o. Sarajevo, focused on monitoring displacements within a specific section of the left tunnel tube, spanning 80 meters. The research was conducted in poor rock mass, characterized by a Rock Mass Rating (RMR) of 27 to 32. This range is particularly challenging for engineers, as it often leads to pronounced deformations during excavation. The findings reveal that by carefully defining the distance between the top heading excavation and the primary invert, construction teams can effectively manage and mitigate these deformations.
“This research offers a mathematical function that correlates displacement with the distance between excavation phases,” Bektašević explained. “This tool not only simplifies the monitoring process but also enhances our ability to predict and control deformations in real-time.” Such advancements are crucial, especially in urban environments where the safety of existing structures and the costs associated with delays are paramount.
The implications of this study extend beyond theoretical knowledge; they carry significant commercial impacts for the construction sector. By optimizing excavation techniques based on geological conditions, contractors can reduce the risk of costly delays and safety incidents. This is particularly relevant in urban areas where infrastructure is densely packed, and the margin for error is slim.
As the construction industry increasingly embraces data-driven approaches, the insights from this research could pave the way for more sophisticated tunneling strategies. Companies may find that integrating these findings into their project planning can lead to enhanced efficiency, reduced costs, and improved safety protocols.
Published in ‘e-Zbornik. Elektronički Zbornik Radova Građevinskog Fakulteta’ (translated as ‘e-Proceedings. Electronic Proceedings of the Faculty of Civil Engineering’), this study is a timely contribution to the ongoing dialogue about innovation in construction methodologies. As urban areas continue to expand and the demand for efficient transportation networks grows, research like Bektašević’s will be instrumental in shaping the future of tunnel excavation in challenging geological environments.