Monitoring of the Walls of Jerez de los Caballeros

IoT (Internet of Things) Technology applied to the study and conservation of Historical Heritage.

The walls of Jerez de los Caballeros are of Templar origin, from the 13th century, although they are partly built over the former Arab precinct, with only 18 of its 26 original towers left.  It has an approximate perimeter of 1,700 m and an area of about 15 hectares, where we can find semicircular towers, many of which are integrated into the current urban layout of the city.  The wall had six gates (Burgos, Alconchel, Sevilla, Nueva, Santiago and the Villa), of which currently two are preserved: the Puerta de la Villa and the Puerta de Burgos.

The challenge:

After the collapse suffered in 2010 in a section of the wall, several phases of restoration have been undertaken.  Initially the rebuilding of the collapsed part was carried out and a large steel structure was placed, bracing the adjacent sections. In the last phase, the braced sections are consolidated in order to eventually remove the support structure.

Systratec is commissioned to continuously monitor the inclination of the braced sections during the consolidation phase of the wall and, most critically, during the withdrawal operation of the support structure.  After that, the monitoring will continue to function permanently.

The solution:

During the consolidation phase, Systratec has installed in the building the following equipment:

  • Three high-precision clinometric monitoring points, based on MEMS sensors encapsulated in stainless steel with automatic thermal compensation.
  • Thermometrical monitoring point.
  • A central hub for receiving the signal of all monitoring points, store them locally and transmit them via the 4G network to Systratec’s cloud.

Live monitoring.

The data sent to our cloud are received and processed in real time by our cloud server, identified and stored in our big-data system.  The alarm conditions of the installation (absolute limit thresholds and maximum relative variations) are also checked in real time, automatically sending an e-mail –when necessary-  to the addresses configured for this purpose.

We also provided our customer with a web tool that allows them to consult and download all measurements made by the different sensors.


The results.

Since the implementation of the monitoring system, variations in the wall inclination have been recorded minute by minute with a precision of a tenth of a degree. This information has been of vital importance during the construction phase of the structural reinforcement micropiles. In addition, thanks to the high frequency in the data collection, the system allows real-time monitoring while removing the temporary support steel structure.
















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