https://journals.tultech.eu/index.php/ijitis <p>The <strong>International Journal of Innovative Technology and Interdisciplinary Sciences (IJITIS) (ISSN 2613-7305)</strong> is a reputable open-access, quarterly multidisciplinary journal that serves as a platform for the publication of reviews, regular research papers, short communications, and special issues on specific subjects, all presented in the English language. With a focus on fostering academic exchange and disseminating original research, IJITIS showcases the latest advancements and achievements in scientific research from Estonia and beyond to a global audience. Our journal welcomes original and innovative contributions across various fields of technology, innovation in the sciences, and interdisciplinary studies. We encourage submissions that provide valuable insights through analytical, computational modeling, and experimental research results. IJITIS is guided by an esteemed international board of editors comprised of distinguished local and foreign scientists and researchers. Notably, we actively seek manuscripts that introduce new research proposals and ideas, and we offer the option for authors to submit supplementary material such as electronic files or software to enhance the transparency and reproducibility of their work.</p> TULTECH en-US International Journal of Innovative Technology and Interdisciplinary Sciences 2613-7305 https://journals.tultech.eu/index.php/ijitis/article/view/449 <p style="font-weight: 400;">Modern urban underground construction requires retaining systems that satisfy both ultimate and serviceability limit states while ensuring reliable performance throughout excavation. This study presents the numerical evaluation and performance verification of an anchored secant pile wall through the case study of the deep excavation at “Çerçiz Topulli” Square, Gjirokastra, Albania. The study involved a 12.9 m deep excavation for a three-level underground structure in multilayered soil conditions. A reproducible plane-strain finite-element model, incorporating beam-on-elastic-foundation elements, was developed to simulate staged excavation, soil stratification, groundwater conditions, anchor activation, and construction sequences. The retaining system performance was assessed using normalized wall deflection, serviceability criteria, deformation prediction accuracy, and anchor efficiency. The maximum calculated lateral wall displacement was 12.1 mm, corresponding to a normalized wall deflection (<em>δ</em>max<em>/H</em>) of 0.094%, which is substantially below the commonly accepted serviceability limit of 0.5%. Comparative analyses indicate that the prestressed anchor system reduced wall deformation by approximately 25% relative to an equivalent unanchored excavation, while controlled dewatering was required to maintain excavation stability. The proposed framework provides a validated methodology for the design verification and performance assessment of anchored secant pile walls in deep urban excavations. The findings offer practical guidance for optimizing retaining systems in multilayered soils and establish a transferable approach for similar underground infrastructure projects in complex urban environments.</p> <p> </p> <p> </p> Enkeleda Kokona Helidon Kokona Husam Abujwaid Hussein Alkattan Mostafa Abotaleb Ghassan AL-Thabhawee Copyright (c) 2026 Enkeleda Kokona, Helidon Kokona, Husam Abujwaid, Hussein Alkattan, Mostafa Abotaleb, Ghassan AL-Thabhawee https://creativecommons.org/licenses/by/4.0 2026-08-03 2026-08-03 9 3 1496 1545