Rareș Andrei CHIHAIA

29-46 OPTIMIZAREA FUNCȚIONĂRII UNEI PRIZE DE APĂ ECOLOGICE PRIN TESTAREA UNUI MODEL LA SCARĂ REDUSĂ

Această intrare a fost publicată în 2016 Volumul 29 și etichetată Bogdan CORBESCU Gabriela OPRINA Lucia-Andreea EL-LEATHEY Lucian MÂNDREA Rareș Andrei CHIHAIA la de

ECOLOGICAL WATER INTAKE OPTIMIZATION BY SMALL
SCALE MODELLING
The main objective of the paper is to demonstrate the efficiency of an
ecological water intake by optimizing its operation using experimental modelling
techniques. The tests have been performed on a dedicated small scale model
integrated in a specially design testing flume.
This paper presents the general considerations regarding the ecological
intakes for Mountain Rivers and focuses on identifying design methods suitable
for performance increasing. A simplified prototype installation was designed
starting from the patented sand-less ecological intake. Based on this design, a
1:10 small scale model was developed and installed in a dedicated stand. It
was possible to determine the water speed, the flow from the main channel and
the captured flow in different testing conditions, by using specific measuring
equipment and methods. The obtained results were transposed to the prototype
installation by applying Froude similarity criteria, proving to be useful to the
elaboration of the main design parameters for water intakes.
Keywords: water intakes, Mountain Rivers, experimental model, similarity
Cuvinte cheie: prize de apă, râuri de munte, model experimental,
similitudine

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27-55 DETERMINAREA SOLICITĂRILOR PRIZELOR DE APĂ CU CONDUCTE ÎNGLOBATE ÎN PILE

Această intrare a fost publicată în 2015 Volumul 27 și etichetată Ileana POPA Lucian MÂNDREA Rareș Andrei CHIHAIA la de

THE STRESS DETERMINATION FOR WATER
INTAKES WITH PIPES INSIDE PILES
This paper presents the initial stress calculations performed in order to validate a future innovative solution which incorporates both the sluices and the water intake with the supply pipes embedded within the concrete piles.
A brief calculus was done to estimate the supplementary forces involved in the dam stress. It starts from simplifying assumptions in order to estimate the stress supported by the concrete piles. The obtained results will be furthermore used to determine if the envisaged solution requires special methods of foundation or structural reinforcement.
Keywords: water intakes, supply pipes, dam cells, dams
Cuvinte cheie: prize de apă, conducte de alimentare, pile, baraje

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25-34 CREŞTEREA SIGURANŢEI ÎN EXPLOATARE A BARAJULUI IZVORU MUNTELUI PRIN MODERNIZAREA ECHIPAMENTELOR HIDROMECANICE ALE GOLIRILOR DE FUND

Această intrare a fost publicată în 2014 Revista Volumul 25 și etichetată Corneliu MĂLĂNCIOIU Lucian MÂNDREA Nicolae TĂNASE Rareș Andrei CHIHAIA la de

INCREASING THE OPERATING SAFETY OF THE IZVORU
MUNTELUI DAM THROUGH THE HYDRO-MECHANICAL
EQUIPMENT MODERNIZATION OF THE BOTTOM OUTLETS
Bottom outlets are considered to be the most important hydraulic
structures in dams. They have an essential role in filling and emptying the
reservoir thus preventing flood risks, maintaining the safety operation, removing
sediments and allowing rehabilitation works. This paper presents the solutions
for increasing the operating safety of the Izvoru Muntelui dam through the
hydro-mechanical equipment modernization of the bottom outlets starting from
the operational issues that occurred over time. The solutions mainly aim to
eliminate the vibrations during the valves operation and to identify ways that will
allow the service and the maintenance of the bottom outlet valves. Fitting a
valve downstream, at the end of the bottom outlet will increase the safety
degree, allowing the operation of the existing valves in balanced pressure
conditions, thus avoiding undesired vibrations.
Keywords: bottom outlet, jaw valve, Venturi tube, cofferdam
Cuvinte cheie: golire de fund, vană cu fălci, tub Venturi, batardou
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