Conclusions
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1.
To reduce the cost and construction time of hydro developments, it is necessary to introduce more widely continuous concreting technologies. Concreting of heavily reinforced and thin-walled structures and members is most effectively done with cast concrete mixes by means of modern concrete pumps.
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2.
As a result of experimental investigations of pipeline delivery of mixes by BN-80-20 concrete pumps, the values of the specific resistances during pumping of various compositions of the mixes and the local resistances of quick-disconnecting pipe connections were determined; recommendations were developed for calculating the distance of pipeline transport of the mixes by the concrete pumps; the values of Kf, the volume filling of the transport cylinders of the concrete pump with the plasticized concrete mix, and Kd, the inertial component of the pressure during displacement of the mix, were refined.
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3.
The two-year experience of using the means (conveyors, concrete pumps) of craneless technology of placing concrete for construction of the powerhouse of the Shul'binsk hydro development showed that even with the high price and underutilization of the potential possibilities of the equipment and mechanisms, a considerable savings was obtained due to shortening of the construction time and start-up of the first unit of the hydrostation ahead of schedule.
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Literature cited
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Additional information
Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 10, pp. 38–43, October, 1990.
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Teleshev, V.I., Komarinskii, M.V., Danilov, V.M. et al. Investigation and experience of using concrete-pump transport at the construction of the Shul'binsk Hydroelectric Station. Hydrotechnical Construction 24, 639–646 (1990). https://doi.org/10.1007/BF01429341
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DOI: https://doi.org/10.1007/BF01429341