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University of Porto UPHS. Numerical Modelling AN INNOVATIVE UNDERDROUND POWER SHEME Numerical Modeling Bruno Correia Luis Leal L. Ribeiro e Sousa University of Porto, Portugal
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University of Porto UPHS. Numerical Modelling This presentation is related to an UPHS innovative hydroelectric scheme in a small island, Portugal. Also presents numerical analyses performed considering FEM models developed at University of Porto.
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University of Porto UPHS. Numerical Modelling The UPHS system is equipped with reversible units with a differential elevation of about 450m between an upper tunnel and a lower storage tunnel. The repowering included the sequence of underground works: –5.2km tunnel located at upper level –A gallery for storage with a total capacity of 40 000m 3 –A cavern pumped station –An auxiliary gallery
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University of Porto UPHS. Numerical Modelling
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University of Porto UPHS. Numerical Modelling UPHS Scheme
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University of Porto UPHS. Numerical Modelling Upper reservoir –5200 m –40000 m 3
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University of Porto UPHS. Numerical Modelling Lower reservoir –1200 m –40000 m 3
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University of Porto UPHS. Numerical Modelling Pumped Station
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University of Porto UPHS. Numerical Modelling Auxilliary tunnel
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University of Porto UPHS. Numerical Modelling Geomechanical characterization –ZG1–ZG2
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University of Porto UPHS. Numerical Modelling Lower reservoir Túnelkm inicialkm finalExtensão (m) Frente 10+017,5000+473,000475,50 Frente 21+153,0001+536,000340,50 Frente 31+722,0002+598,000198 Frente 42+681,0003+406,50036,50 Frente 52+681,0003+406,500112 Frente 62+681,0003+406,50037,50 Total1200
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University of Porto UPHS. Numerical Modelling Auxiliary tunnel
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University of Porto UPHS. Numerical Modelling Volcanic materials Compact basaltBreccias
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University of Porto UPHS. Numerical Modelling FEM models for lower reservoir –Phase 2 – Rocscience –4 stages Stages
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University of Porto UPHS. Numerical Modelling 3 types of volcanic formations
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University of Porto UPHS. Numerical Modelling Conclusions
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University of Porto UPHS. Numerical Modelling Analysis of different shapes
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University of Porto UPHS. Numerical Modelling Total displacements
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University of Porto UPHS. Numerical Modelling Pumping station –High - 26 m; –width - 12 m; –length - 44 m
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University of Porto UPHS. Numerical Modelling FEM models –11 stages
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University of Porto UPHS. Numerical Modelling Analysis of the structural behaviour
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University of Porto UPHS. Numerical Modelling –Horizontal displacements at the walls –Settlements at surface
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University of Porto UPHS. Numerical Modelling Safety factor
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University of Porto UPHS. Numerical Modelling Generalized forces –a) N; b) T; c) M
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University of Porto UPHS. Numerical Modelling 3D model Plaxis
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University of Porto UPHS. Numerical Modelling Upper tunnel
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University of Porto UPHS. Numerical Modelling 5200 m – single TBM
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University of Porto UPHS. Numerical Modelling Fall of basalt blocks
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University of Porto UPHS. Numerical Modelling Geometry
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University of Porto UPHS. Numerical Modelling Thank You
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