To start with this week we had a day combining two very interesting topics explained by experts coming from the leading companies in the sector. Firstly, Maurizio Leotta from UTT Mapei (Waterproofing Director) went deeply trough the technologies and solutions applied by his company to waterproof the lining structures. The discussed solutions are not only applicable for tunnels but also for stations and other underground facilities lying under water table or that may expect some water influence in the span of their lifetime. Some application cases were studied focusing on the details and joints between elements, because these are the main source of failure of the system that would lead to undesired situations.
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| Maurizio Leotta (UTT Mapei) and Students after the lecture on Waterproofing systems. |
After this lecture we moved to another topic very important and it is the probing ahead of a TBM face. Thomas Dickmann from Amberg consulting company held an outstanding lecture on geological and geophysical survey applications for TBM technology. He presented some techniques used for the evaluation of the ground properties ahead of the excavation face within the advancement steps. Finally he introduced the procedure developed by his company, the so called TSP (Tunnel Seismic Prediction) to define through a low charge D&B scheme with a good detail the conditions to be encountered.
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| Tunnel Seismic Prediction by Amberg Company presented by Thomas Dickmann. |
In the following days Vincenza Floria (Geodata Engineering) introduced the main aspects and potentialities of Numerical Modelling for underground structures design. She established the theoretical basis considering also a big amount of case studies from her wide experience in Geodata projects all around the world. Thanks to a license provided by ITASCA we were able to apply all the concepts learned by using FLAC software to solve some simple examples performing a parametric analysis on the influence of the modification of certain ground and lining parameters on the system behaviour.
This is an amazingly powerful tool for the design that must be used with skill and knowledge about its limits and background theories.
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