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Abstract: The Solbiate Olona tunnel represents a very significant project, solving the problem of interference between the “Pedemontana Lombarda” Motorway alignment and one part of the Solbiate built area, overlooking the Olona Valley. After a long stretch of cut & cover tunnel, the tunnel passes underground through gravelly-sandy ground, beneath various residential...
Abstract: The project and construction for the new high speed railway line (connecting Genoa to Milan) faced one of the most important environmental issues: safe excavation and managing of rocks, that may contain asbestos in relevant amounts. Asbestos is a group of fibrous minerals that mainly occurs in mafic and ultramafic rocks (ophiolitic sequences). This work focuses the criteria to better evaluate...
Abstract: Along the track of Thessaloniki Metro, the two precast segment lining tunnels pass through an active fault named “Philaya”. According to the available data from scientific bibliography, (most important: Pitilakis and associates, 2014 expertise report), the fault plane is assumed to cross the longitudinal tunnel axis perpendicularly, under a dip angle of 60° or 70°. The potential coseismic...
Abstract: In the planning of underground structure, geological, geomorfhological and hydrogeological aspects have to be carefully investigated in order to evaluate risk assessment between the new excavation works and the pre-existing, especially in the presence of landslides. In this paper, a methodology approach is presented, considering some recent experiences in the Italian Apennines collected on...
Abstract: Systematic reinforcement of the core-face of a tunnel using glass-fiber elements as a structural component to stabilize it in the long and short term is a practice developed in ltaly that has been used for over twenty-five years. During this period significant developments for core-face reinforcement technique have occurred in design approach, construction technologies and materials. This paper...
Abstract: In ancient times, the underground was used much more wisely and intensively than it is today, especially considering the differences in technology available. This is mainly caused by modern distrust towards building underground works due to the inability of the approaches used in the recent past (and used also today) in design and construction to guarantee the success of investments and the...