Hydraulic Tests of the Operational Spillway of the Bureya Hydraulic Project
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Vol. 54, No. 4, November, 2020
HYDRAULIC TESTS OF THE OPERATIONAL SPILLWAY OF THE BUREYA HYDRAULIC PROJECT O. A. Petrov1 and A. V. Popov2 Translated from Gidrotekhnicheskoe Stroitel’stvo, No. 5, May 2020, pp. 18 – 24.
The results of hydraulic tests of the operational spillway of the Bureya Hydraulic Project in 2008, 2009, and 2016 are presented. The tests were intended to assess the geometric parameters of the downstream flow, the aeration and spray conditions, the hydrodynamic impact on the main gates, and the flow and wave pattern downstream between HWL = 248.30 m and TCS = 256.00 m. Keywords: hydraulic test; operational spillway; flow parameters; aeration; hydrodynamic impact; waves; channel scour; Bureya Hydraulic Project.
probability of 0.1% at TCS = 256.00 m and in the test case, 13,800 m3/sec (including 11,700 m3/sec through the spillway) with an exceedance probability of 0.01% at TCS = = 263.40 m. Partial and three-dimensional models of the hydraulic project have been used since 1974 to justify the design of the overflow dam and its components, including rejection of five partition walls, construction of curved flip buckets in bays Nos. 1, 2, 7, 8, and determination of the flow characteristics within the downstream face and in the tailwater. The hydraulic test performed in laboratory made it possible to resolve a wide range of issues intended to optimize the design of the operational spillway, which was erected to the design elevations in the late 2007. After the completion and before the commissioning of the spillway, it was decided to conduct full-scale tests to check whether this structure meets the design requirements to its operating conditions and long-term resistance to highspeed flow. The tests were intended to assess the geometrical parameters of the flow after the ledge aerators on the downstream face and after the flip buckets, the aeration and spray conditions, the hydrodynamic impact on the gates, the hydraulic pattern in the tailwater, and the scour of the spillway channel. The integrated tests of the operational spillway were conducted by the Lenhydroproject company as the general designer, the RusHydro Branch — Bureya HPP, and B. E. Vedeneev All-Russia Research Institute of Hydraulic Engineering. The spillway was tested for the first time on September 10 and 11, 2008 when HWL = 248.30 m. The gates were opened in the sequence developed based on the three-dimen-
The construction of the operational spillway of the Bureya Hydraulic Project was completed in 2008. The spillway was planned to be tested to check whether its operating conditions agree with the specifications and laboratory data. The first test was conducted in September, 2008 when the headwater level (HWL) was 248.30 m, i.e., 7.7 m below the top of conservation storage (TCS). Integrated tests were conducted in 2009 and 2016 when HWL = 253.00 – 256.00 m. The Bureya Hydraulic Project on the Bureya River includes a concrete gravity dam of 139 m maximum height and 789 m crest length and a reservoired HPP of 198.87 m length with six h
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