Power Technology and Engineering (formerly Hydrotechnical Construction)

doi: 10.1007/BF02304364pmid: N/A

Gamus, I.

doi: 10.1007/BF02304365pmid: N/A

Kaveshnikov, A.; Lentyaev, L.

doi: 10.1007/BF02304366pmid: N/A

Protection of the Sayano-Shushenskoe spillway from cavitation erosion is achieved by an aeration sill behind the radial gate and an aeration groove at elevation 35.25 m. The air content in the near-bottom layer (without consideration of its increase in the prototype) will be at least 6–8%, which is sufficient to eliminate cavitation erosion. As a consequence it seems possible to reduce the grade of concrete in the spillway with a strength of 400 kgf/ cm2 to grade 300 kgf/cm2. Protection of the upper concrete-hauling trestle from splashes is provided by deflectors.

Shaikin, B.

doi: 10.1007/BF02304367pmid: N/A

1. Of the 1652 cracks found in the Ust-Ilim dam concrete, 12–13% were through and deep. 2. An increase in the planar dimensions of the blocks along the axis of the dam to 22 m without correction of the requirements imposed on their thermal regime promote an increase in the rate of cracking. All percolating cracks were found in joined blocks. 3. To reduce the rate of cracking the requirements imposed on providing the thermal regime of the concrete masses must be coordinated with the construction work at individual stages of construction.

Mironov, S.; Demidov, V.

doi: 10.1007/BF02304368pmid: N/A

1. Cohesion in the working joint of a monolithic structure when pouring concrete on a frozen foundation can be provided by using an addition of sodium nitrite to the concrete. 2. The magnitude of cohesion in the joint at negative temperatures is within approximately the same strength limits of a monolith as at positive temperatures and depends on the type of preparation of the foundation and methods of treating the joint. 3. The use of brushing of the surface of freshly-poured concrete during its setting period gives better results with respect to cohesion of concretes than the use of scoring. 4. Data from the laboratory experiments indicate the expediency of using the method of pouring concrete with sodium nitrite on a frozen concrete foundation at individual installations.

doi: 10.1007/BF02304369pmid: N/A

Volotskoi, D.; Gurevich, I.; Netfullov, Sh.

doi: 10.1007/BF02304370pmid: N/A

Ermolaeva, A.; Rel'tov, B.; Pavchich, M.

doi: 10.1007/BF02304371pmid: N/A

Aleksandrovskaya, É.; Kadyskina, N.; Sapozhnikov, L.; Pesin, G.

doi: 10.1007/BF02304372pmid: N/A

Érlikhman, B.

doi: 10.1007/BF02304373pmid: N/A