Read e-book online Arch Dams: Designing and Monitoring for Safety PDF

By Jose O. Pedro

ISBN-10: 3211831495

ISBN-13: 9783211831496

ISBN-10: 3709124883

ISBN-13: 9783709124888

The current quantity offers a finished figuring out of the fashionable standards, types and strategies of study of arch dams, for regular operation stipulations and lower than unparalleled so much. this knowledge is necessary for all these serious about the overview of the behaviour and situation of arch dams and different huge buildings, both for layout or tracking purpose.

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Additional resources for Arch Dams: Designing and Monitoring for Safety

Sample text

The list above shows also that, as far as the deterioration of the dam body is concerned, arch dams are more reliable than multiple arch dams. Indeed, the number of incidents reported for arch dams ( 61) is about twice the one for multiple arch dams (31 ), whereas the number of arch dams is about seven to eight times higher than the one for multiple arch dams. Some incidents concerning the dam body of arch dams have occurred already during the first five years of operation. Important incidents occurred at the El Atazar (Spain), Chambon and Voughans (France) arch dams (Urbistondo and Yges 1985, Bister et al1991).

5 to 2 as with regard to the internal friction (in general, the cohesion is the most important parameter for current scenarios); - the seepage and leakage, particularly in the foundation, do not exceed the flow corresponding to an average permeability of 1 Lugeon; - the uplift at the dam base, in the zone of the drainage curtain, does not exceed one third of the water pressure at the dam heel. For hazard scenarios (exceptional conditions), although many punctual failures may develop in the dam and its foundation, a global failure oflarge volumes should not occur.

7) was made by means of different mathematical models (Pedro and Camara 1986, Pina et al 1990). The results obtained were checked with in-situ tests of small forced vibrations, applied by means of an eccentric mass vibrator (Pedro et al 1986). The evaluation of the dam behaviour under strong earthquakes was subsequently made by step-by-step analyses of the so calibrated models The seismic action was defined by acce/erograms, derived from the power spectra adopted in the Portuguese Regulations (RSA 1984).

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Arch Dams: Designing and Monitoring for Safety by Jose O. Pedro


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