PSI - Issue 78

Vincenzo Calvanese et al. / Procedia Structural Integrity 78 (2026) 1134–1142

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Finally, the last part of the intervention also involves the reconstruction of the damaged front of the Horrea. This intervention addresses the critical connection between the Horrea's facades and the transverse walls that support the barrel vaults. These connections were originally absent. The frontal walls are currently out of plumb, exhibiting a state of overturning due to the impact of pyroclastic flows at the time of the eruption. While it is essential to preserve the overall deformation to accurately convey the historical event, these overturning walls must be securely linked to the Horrea's load-bearing transverse walls. The plan is to initially seal all voids and cracks and then inject them with structural fluid lime mortar. Subsequently, any unstable stone elements will be consolidated using reinforced micro-stitching involving threaded AISI 304 stainless steel bars (6 mm diameter) inserted into 10 mm diameter perforations. Following this, the masonry gaps, resulting from the same impact phenomenon, will be repaired and restored. These repairs, specifically between the load-bearing masonry and the facade, will utilize masonry similar to the existing one, ensuring the intervention remains identifiable over time.

Fig. 3 Design interventions on the Tempio di Venere

Fig. 4 The Horrea (images courtesy of Giuseppe Mastrangelo)