ENSURE THE STABILITY OF THE WATER RETENTION PLATES OF HYDRAULIC STRUCTURES

A.V. BURLACHENKO, Y.Y. BURLACHENKO, A. BRAKENI, O.N. CHERNYKH

Abstract


In this article are presented the results of experiments on determining averaged and pulsating loads from flow on fastening plates using point and total load sensors. An assessment of pulsation pressures and calculations of hydrodynamic loads on the fastening elements of the downstream of a three-span spillway with an expanding water well, operating in conditions of spatial conjugation of the pools and the presence of three rows of dampers, were carried out. Are analyzed the results of model hydrodynamic studies of short-span culvert structures, which were not sufficiently taken into account during the design, construction and operation of the Shamkir hydroelectric complex on the Kura River. It is noted that on the water basin and apron, when the spillway is operating, both with all culvert openings and with an incomplete front, a wide range of energy-carrying frequencies appears in the amplitude-frequency spectra of pressure and load pulsations. In this case, there is a natural decrease in the role of high-frequency oscillations as one moves away from the area of intense pressure pulsation at the water body and the disappearance of predominant frequencies with a transition from high-frequency spectra at individual points to low-frequency spectra of loads on entire slabs. Ways to optimize the design of fastening plates are proposed. An assessment is made of the possibility of using known methods for finding the total hydrodynamic loads to calculate the stability and strength of the slabs for fastening the water breaker and the apron of tubular-type reclamation spillway structures in relation to the spillway end device of the Shamkir hydroelectric power station in Azerbaijan during its renovation.


Keywords


Fastening plates, Averaged pulsation loads, Pressure pulsation spectra, Drainage holes.

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References


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