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List of products by author: P. Romualdi
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Custom-Designed Instrumentations for Backfill Grouting Investigation
Abstract: Backfill grouting investigation, to verify the grade of filling of the chamber between the extrados of the lining and the excavation profile, is a mandatory operation required by the Customers in tunneling works. A specific process based on Ultrasonic Tomography is proposed in association with a custom-designed Ground Penetrating Radar. The specific process and the custom-designed GPR have been...
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Feasibility analysis for the use of fiber reinforced concrete precast segment in Nenskra hydraulic tunnels
Abstract: The construction of two hydraulic tunnels with a total length of 30 km is forecast in the Nenskra (Georgia) project. These tunnels will be mechanical excavated with a precast segmental lining. The possibility of using fiber reinforced concrete segment without any traditional reinforcement has been considered. In order to obtain suitable performance of the lining, a process was defined in order...
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Ground Water Control by Means of Pervious Backfill Grouting
Abstract: Backfill grouting is a specific item defined by the Customers in tunnelling works to obtain different goals. In between these goals, it is worth to consider the ground water control: to release the water table pressure acting against the precast segmental lining, the backfill grouting must be designed as a pervious material. The actual standard grouting mixes (pea gravel with cementitious...
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