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doi: 10.1007/BF02380154pmid: N/A
1. The hydraulic structures of the V. I. Lenin Volga hydroelectric power station, built on Tertiary clays and alluvial soils, have operated normally for 12 years. 2. The concrete and reinforced concrete of carbonate rubble from local quarries works well in the abovewater and underwater massive elements of the hydraulic and industrial structures, and in the slope revements. 3. Rusting of the reinforcement is occurring for still unexplained reasons in the precast reinforced concrete (in the slabs and bearing beams of the roof of the power plant exposed to the air). 4. Effective means of protecting the metal structures against corrosion have been developed and are under-going long service testing: durable organic coating of perchloride and ethynyl varnishes and electrochemical (cathodic) protection combined with originally applied coatings.
Nichiporovich, A.; Zhurek, Yanush
doi: 10.1007/BF02380155pmid: N/A
1. The character of the distribution of the downstream shell displacement from the water pressure, calculated by the proposed method, corresponds reasonably well with the character of the displacement measured in the field on the Infiernillo dam. Near the foot of the dam there is practically no displacement and it reaches a maximum on the slope. The downstream slope is deformed in the same manner, i.e., near the base the displacement is zero and reaches a maximum value closer to the crest. 2. The calculated and measured displacements of the downstream shell of an Infiernillo-type dam (height 71 m) are comparatively small and do not exceed 10 cm. 3. The calculation gives somewhat exagerrated values of the horizontal displacements in comparison with the field data. 4. When estimating the displacement of a core we must additionally account for the possibility of its tilting toward the upper pool, which is apparently caused by slumping in the upstream shell and core upon filling of the reservoir. 5. Coars-fragmental soils and especially rock fills have well-defined slumping properties and they must be taken into account when designing high dams of local materials. 6. Flooding of the coarse-fragmental material or rock fill simultaneously with erection of the embankment leads to a substantial decrease in subsequent settlement at individual places of the mass in comparison with flooding performed after building up the embankment. 7. It is necessary to continue the development of more accurate analytical methods of predicting the deformations of high dams of local materials.
doi: 10.1007/BF02380157pmid: N/A
1. Cavitation resistance of concretes is closely related to their compressive strengths; the cavitation resistance falls as the strength becomes less, but increase of the strength beyond 500 kg/cm2 produces little increase in cavitation resistance. For linings of conduits, concrete should be used with compressive strength of 450–500 kg/cm2. 2. The parameters of the concrete influence its cavitation resistance in such measure as they improve its strength. For concretes with high cavitation resistance, we would recommend the use of Portland cements with activities of 500–600 kg/cm2, with strong, dense fillers. 3. The method of consolidation and setting has a marked effect on the cavitation resistance of concrete. Hence in concreting the linings of water conduits we must take special measures to get a high-quality surface layer of concrete. 4. Polymer materials are promising for use as linings of outflow channels in high-head water power plants.
doi: 10.1007/BF02380158pmid: N/A
1. In connection with the substantial diversity of the factors influencing the heat consumption, the heat expenditures for concreting during the winter cannot be taken at the level of expenditures on previously constructed hydroelectric projects. 2. The proposed empirical formula for taking into account additional heat losses when heating the air in tents made of prefabricated shields with a heat-transfer coefficient within the experimental values permits determining, with an accuracy sufficient for practical purposes, the heat-loss standard with consideration of the effect of wind speed in a given region.
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