Scipediacontent: Scipediacontent moved page Draft Content 885648562 to Basirico et al 2021a

2021-11-30T13:34:37Z

Scipediacontent moved page Draft Content 885648562 to Basirico et al 2021a

Scipediacontent: Created page with "== Abstract == A real case of consolidation works is presented in which only field testing methods can reveal the causes of instability. This paper is an update of the one pr..."

2021-11-30T13:34:34Z

Created page with "== Abstract == A real case of consolidation works is presented in which only field testing methods can reveal the causes of instability. This paper is an update of the one pr..."

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== Abstract ==

A real case of consolidation works is presented in which only field testing methods can reveal the causes of instability. This paper is an update of the one presented at the SAHC 2018 conference, concerning the study of the partial collapse of the Church of Itria in Piazza Armerina (Sicily, Italy). The previous paper beared hypotheses and design solutions based only on indirect investigations, theoretical formulations and checks with software. The consolidation works, started in November 2018 and still in progress, have made it possible to formulate new and documented hypotheses on the collapse and to integrate and partly modify the solutions hypothesized previously. In particular, the reconstruction techniques of the wall and chains have been confirmed. The new interventions have, instead, concerned the consolidation of the foundation soil which was found to be insubstantial,following electrical tomographic investigations, due to the presence of voids. At the same time, inspections were carried out on an old masonry sewage pipe which revealed several points of discontinuity through which large quantities of water entered under the walls of the church causing the removal of inconsistent elements from the ground. At first, the reconstruction of the collapsed wall was done and the restoration of the existing wall structures, to eliminate the causes of the collapse through the intervention on the sewage pipe and filling the voids under the foundations. The most important intervention, which required the use of innovative materials, forefront equipment and skilled
labor, involved the filling the voids under the foundations through perforations every 50 cm, both on the inner and outer wire of the collapsed wall. Clamped canes were set in order to intercept the voids highlighted by the tomography. A 100% expansive mortar was injected at low pressure through the canes, filling one cane at a time and progressively raising the point of exit of the mortar until the higher far end. After this consolidation, the foundation and the wall were rebuilt with local limestone ashlars to have fair faced aspect as the original masonry. At the end of the work, further tomographic tests are planned to verify the validity of the interventions carried out.

== Full document ==
<pdf>Media:Draft_Content_885648562p611.pdf</pdf>
== References ==

[1] Gil E., Mas A., Lerma C., Torner M.E., Vercher J., Non-destructive Techniques Methodologies for the Detection of Ancient Structures under Heritage Buildings. International Journal of Architectural Heritage (Published online: 17 Dec 2019).

[2] Basiricò T., Campione S., Cottone A., The collapse and restoration of the Church of Saint Mary of Itria in Piazza Armerina (Sicily, Italy). In: R. Aguilar et al. (Eds.): Structural Analysis of Historical Constructions, RILEM Bookseries 18 (2019), pp. 2016-2024.

[3] Villari L., Storia ecclesiastica della città di Piazza Armerina, Società messinese di Storia Patria, Messina (1988).

[4] Trogu A., Ranieri G., Fischanger F., 3D Electrical Resistivity Tomography to Improve the Knowledge of the Subsoil below Existing Buildings. Environmental Semeiotics (2011) 4 (4):63-70.

[5] Torner M. E., Mas A., Lerma C., Herráez J., Analysis Method for Studying Groundwater under a Church. Applied Mechanics and Materials (2016) 861:263-270.

[6] Comina C., Giordano N., Ghidone G., Fischanger, Time-Lapse 3D Electric Tomography for Short-time Monitoring of an Experimental Heat Storage System, Geosciences (2019) 9 (4):167.

[7] Cardarelli E., Fischanger F., 2D data modelling by electrical resistivity tomography for complex subsurface geology. Geophysical Prospecting (2006) 54 (2):121-133.

[8] Torner M. E., Mas A., Lerma C., Gil E., Vercher J., Embedding of the Church of the Asunción of Llíria (Spain). Origin and Consequences. Estoa (2019) 16 (8):111-119.

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Scipediacontent: Scipediacontent moved page Draft Content 885648562 to Basirico et al 2021a

Scipediacontent: Created page with "== Abstract == A real case of consolidation works is presented in which only field testing methods can reveal the causes of instability. This paper is an update of the one pr..."