PSI - Issue 84

Lorenzo Di Taranto et al. / Procedia Structural Integrity 84 (2026) 1007–1014

1014

characterized by multiple roto-translational sliding with several active slip surfaces and DSGSD. The conducted analyses, supported by recent inclinometer data, confirm the presence of a deep and slow kinematic process located at a depth of approximately 26–28 meters, with cumulative displacements reaching 18 mm per year at the viaduct's right abutment. These dynamics appear strictly conditioned by the hydrogeological regime, as demonstrated by the correlation between intense rainfall events, increased piezometric levels, and the observed kinematic accelerations. The presence of confined pressurized thin layers acts as a triggering factor for slope reactivations, which is reflected in a consistent structural response documented by tiltmeter monitoring systems. In conclusion, the integrated interpretation of the geomorphological and geological setting with structural data and ongoing processes is confirmed as the fundamental tool for risk mitigation and the correct design of the stabilization measures necessary to prevent irreversible deterioration of the structure. This underscores how the interaction between rapid meteoric recharge through sinkholes and the presence of basal pressurized sandy horizons defines a precarious equilibrium for the structure-foundation system, necessitating consolidation interventions aimed at managing deep pore water pressures to ensure the long-term stability of the viaduct. These results are valuable for the design of mitigation measures. Authors’ personal contributions: This work was developed in its various aspects with an equal contribution by Lorenzo Di Taranto and Antonio Fiorentino, with the support of Giampiero D’Ecclesiis and Giuseppe Napoli under the scientific coordination of Prof. Angelo Doglioni and the supervision of Prof. Vincenzo Simeone. Acknowledgements The authors would like to thank “ ANAS S.p.A. – Struttura Territoriale Basilicata ” for providing the data analyzed in this study and for the opportunity to present the results at the “ III Fabre Conference – Existing bridges, viaducts and tunnels: research, innovation and applications ”. Special thanks are also extended to Fabre and the MARIE Project for their scientific and financial support in developing this work, as well as for the opportunity to share these findings during the conference. References Barla, G., 2018. Numerical modeling of deep-seated landslides interacting with man-made structures. Journal of Rock Mechanics and Geotechnical Engineering 10, 1020–1036. https://doi.org/10.1016/j.jrmge.2018.08.006 D'Ambrosio, G., Doglioni, A., Nitti, D.O., 2023. The impact of very slow moving gravitative slope deformations on infrastructures: the case study of the Bridge of Ginosa. Italian journal of engineering geology and environment 33–38. https://doi.org/10.4408/IJEGE.2023-01.S-05 Fiorentino A., Di Taranto L., Simeone V., Doglioni A. (2026) The impact of a slow active earth-flow on a viaduct of a national road in Southern Italy - Procedia Structural Integrity xx (2026) Fiorentino A., Barla M., Brezzi L., Corti M., Cernuto E., Dezi F., Di Taranto L., Doglioni A., Gabrieli F., Gatto M., Insana A., Lupattelli A., Longoni L:, Misiano S., Montrasio L., Papini M., Perilli N., Salciarini D., Squeglia N., Stacul S., Vitaletti A., Simeone V., Simonini P. (2026) Landslide Bridge interaction risk assessment: MARIE research project - Procedia Structural Integrity xx (2026) Gabrieli, F., Gibin, F., Brezzi, L., Cernuto, E., Lupatelli, A., Salciarini, D., Mammoliti, E., Dezi, F., Stacul, S., Squeglia, N., Doglioni, A., Simeone, V., Simonini, P., 2024. Lessons from international case studies on bridge-slide interaction problems. Procedia Structural Integrity 62, 506–513. https://doi.org/10.1016/j.prostr.2024.09.072 Guerricchio, A., Melidoro, G., 1981. Movimenti di massa pseudo-tettonici nell’Appennino dell’Italia meridionale. Lacroix, P., Handwerger, A., Bièvre, G., 2020. Life and death of slow-moving landslides. Nature Reviews Earth & Environment 1. https://doi.org/10.1038/s43017-020-0072-8 Nappo, N., Peduto, D., Mavrouli, O., Westen, C.J. van, Gullà, G., 2019. Slow-moving landslides interacting with the road network: Analysis of damage using ancillary data, in situ surveys and multi-source monitoring data. Engineering Geology 260, 105244. https://doi.org/10.1016/j.enggeo.2019.105244 Pánek, T., Klimeš, J., 2016. Temporal behavior of deep-seated gravitational slope deformations: A review. Earth-Science Reviews 156, 14–38. https://doi.org/10.1016/j.earscirev.2016.02.007 Simeone, V., Doglioni, A., D’Ambrosio, G., Fiorentino, A., Nitti, D.O., Nutricato, R., Guerricchio, A., 2024. Nutcracker Deformation Of Arch Bridge In Consequence Of Slow Gravitational Slope Deformations. Procedia Structural Integrity 62, 561–568. https://doi.org/10.1016/j.prostr.2024.09.079