Power Technology and Engineering (formerly Hydrotechnical Construction)

doi: 10.1007/BF02380099pmid: N/A

Baranov, A.

doi: 10.1007/BF02380100pmid: N/A

1. The methods of lowering the water table which were employed on canal structures primarily enabled us to control rather successfully the problems encountered in dewatering the foundation pits. 2. In conducting operations to lower the water table at a number of sites, significant corrective action was taken on the design scheme; this was associated with the difference between the actual hydrogeologic conditions and those assumed during the planning stages. This suggests the need for increasing the volume of investigatory work for the purpose of a more complete study of the geologic profile, the seepage characteristics of the soils, and the interaction between the water-bearing levels. 3. In ideal foundation pits, the fundamental difficulties are associated with the interception of the residual influx of water through the sand-impervious contact. In isolated cases, these difficulties have been surmounted by installing a deep trench backfilled with a porous material and the water removed from it by well-point installations.

Ivanov, V.; Kuznetsov, V.; Fomichev, V.

doi: 10.1007/BF02380101pmid: N/A

Experience with the construction of the dam with the metal diaphragm, which serves the Serebryanka No. 2 hydroelectric power station, has shown that for regions of the Extreme North, these dams are considerably more economical than dams with earth antiseepage elements, and the procedure employed for their installation is quite simple.

Sakharov, V.

doi: 10.1007/BF02380102pmid: N/A

1. Laboratory and full-scale investigations showed the possibility of using coatings of epoxy-coal tar foamed plastic for insulation-waterproofing of hydraulic structures in regions with a rigorous climate. 2. It was established that in the case of the same insulating effect the insulation-waterproofing of epoxycoal tar foamed plastics is one of the most economical in the construction of structures by any method. 3. For zones of a variable water level, on structures not subjected to the effect of ice, insulation-water-proofing with a protective enclosure of glass-reinforced plastic can be recommended. Under constant ice conditions it is necessary to use coatings with a sheet-metal enclosure. 4. In connection with the increased shrinkage of the epoxy-coal tar foamed plastics the thickness of coatings on their base should not exceed 5cm. It is necessary to continue the search for cheap foamed epoxies not having a high shrinkage.

Osipov, A.

doi: 10.1007/BF02380103pmid: N/A

Lomize, G.; Fedorov, V.

doi: 10.1007/BF02380104pmid: N/A

doi: 10.1007/BF02380105pmid: N/A

Kotov, P.

doi: 10.1007/BF02380106pmid: N/A

Berdichevskii, G.

doi: 10.1007/BF02380107pmid: N/A

1. The proposed method enables us to assess the reliability of the results obtained from experimental model studies, to allow for the effect of the possible variability of initial data on the models, and to obtain a statistical estimate of the characteristics measured in the experiments. 2. An analysis made in connection with the proposed method confirmed the authenticity and reliability of results obtained on a geomechanical model of Toktogul dam, and also made it possible to supplement conclusions drawn on the character of the dam's behavior under load with quantitative estimates.

Petrov, Yu.

doi: 10.1007/BF02380108pmid: N/A

1. To justify the use and differentiate the areas of use of various paints proposed for the anticorrosion protection of hydromechanical equipment [1], we conducted systematic studies of the variation in the bend resistance, impact resistance, adhesion, and electric volume resistivity of KhS-720, KhV-74, ÉFAZhS, and ÉKZhS-40 coatings under conditions approximating those on metal structures at hydroelectric stations. These properties were selected as characteristics of the protective capacity of the coatings under a given set of conditions. 2. According to the results of the studies, the KhS-720 and KhV-74 paints applied over a VL-02 rust-proofing primer can be considered the current optimum variant for the anticorrosion protection of hydromechanical and water-power equipment that operate in water at hydroelectric stations. 3. An experimental introduction of these alternate schemes of coatings, which was overseen by the B. E. Vedeneev All-Union Scientific Research Institute of Hydraulic Engineering at the Iova, Kakhovka, and Narva hydroelectric stations, confirmed the practical feasibility of the widespread use of these coatings.