Rad Array

Rad Array

ASE s.r.l. produces and commercializes innovative instrumentations designed for geotechnical and environmental monitoring. Our systems are fully automated and the data management involves the acquisition, storage and elaboration of data along with their representation through a web based platform.

 

The construction of underground excavations is characterized by a high degree of uncertainty, due to the implicit simplifications of the calculation models, and the difficult determination of the geotechnical and geomechanical parameters of the tunnel surroundings. The design assumes a predictive role, based on the best hypotheses of soil/rock behaviour and needs to be validated or revised during the construction phase. For this reason, design forecasts and monitoring outcomes should be continuously compared during construction. The Rad Array is the ideal instrument to deal with this task, since it provides immediate information about the deformation of the excavation profile and it does not interfere with the following construction phases. Rad Array is an innovative tool designed for near-real time monitoring of tunnels deformations some meters inside the rock mass along radial perforations both during the excavation and operational phases. It is based on MUMS technology and it can be coupled with an Multipoint borehole extensometers to monitor the 3D deformations of tunnel. The instrument is shipped in a box, divided into segments, in order to make it easy to carry it inside the tunnel, even when its diameter is small. The weight of the instrument does not generally exceed 15 kg and can, therefore, be carried by hand. After this procedure, it is possible to insert the instrument in a radial boreholeand cement. The Rad Array instrument is composed of a sequence of synthetic resin nodes (Radial Links) connected by a fiberglass rod. The rod is required to preserve the alignment and distance between the nodes.The tool can be customized according to the specific needs, according to the tunnel size and to the required resolution. Each node includes a 3D MEMS accelerometer that measures the Earth's gravitational field components and a thermometer required for measurement calibration.

 

  • Tunnel Deformations