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List of products by author: N. Plasencia
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First filling of hydraulic tunnels of Venda Nova III hydropower scheme
Abstract: Venda Nova III reversible hydroelectric power scheme presents features that make it an interesting case study. Worth mentioning are the slope and the length of the 12 m diameter unlined hydraulic circuit, the high water head, the great depth of the powerhouse cavern and the proximity to the hydraulic circuit of Venda Nova II. In this type of projects, the main effect of the internal water...
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The surge shafts of Venda Nova III hydropower plant's surge tank – geological conditions and constructive solutions
Abstract: Venda Nova III repowering project is an underground hydropower scheme. Its hydraulic circuit comprises, inter alia, an upstream surge tank, which aims to dissipate hydraulic transients due to turbine and pumping operations. This upstream surge tank consists of a main shaft, an expansion chamber, a lower chamber and two vertical shafts connecting to the headrace tunnel. The two vertical surge...
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Total Convergences Modelling in Tunnelling a tool for Designers and Contractors
Abstract: One of the main problems in underground excavations regarding geotechnical monitoring, especially when excavated with drill and blast, is the late installation of the instruments, namely convergence’s sections. Due to the applied construction methods, the minimum distance, defined on Monitoring and Observation Plans, to which the convergence profiles must be installed, is usually exceeded. This...
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