A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Conclusions The successful completion of the construction of the Chirkey and Miatla arch dams under complex geological conditions and the state of the concrete masonry under load show the possibility of the wide use of this most economical design of dams.The technology of level concreting used proved its effectiveness first of all by the record rate of increase of the dam in height of 7.7 m/month on average, with the maximally attained rate of 12 m/month.An analysis of the experience of constructing the Miatla dam permits the assertion that the level technology provides the absence of cracks at a high rate of constructing the dam (up to 12 m/month). The creation of a uniform temperature field over the height of the dam and over its horizontal sections in the level technology with covering times of not more than 7 days made it possible: to simplify the technology of temperature regulation and to ease the requirements imposed on the parameters of temperature regulation; to provide an increase of opening of the section joints to 5–7 mm, double that of the usual opening, which provides conditions for high-quality grouting of the section joints.The experience of organizing construction inspection at the Miatla dam showed: the effectiveness of additional expenditures on installing a large number of sensors under conditions of accelerated construction of the dam and with the development or mastering of new technology requiring research; the expediency of using methods of flexible regulation of the temperature regime of concrete allowing prompt maneuvering of the means providing it, which leads to a reduction of expenditures on the temperature regulating system; effectiveness of strict checking of the operation of the pipe cooling system providing high rates of cooling of the concrete masonry (on average 9°/month) and reducing the operating cost of the refrigeration station.Operating experience showed the considerable effect of means of intrablock mechanization on the rate and quality of constructing the structures. It is necessary, finally, to organize the industrial manufacture of light, small compacting machines, reliable effective manual vibrators and equipment for them, and also light, effective cranes for installing and dismantling the framework and reinforcement meshes in the blocks.The experience of constructing the Chirkey and Miatla dams showed the need for developing cableway equipment as the main mechanism in arch dam construction. A cableway makes it possible to begin works on preparing the bed of the structures as the pits are being excavated, to develop a maximum rate on concreting works, to create a single materials delivery front, and to optimize the technology with a unified load-carrying capacity.
Conclusions The successful completion of the construction of the Chirkey and Miatla arch dams under complex geological conditions and the state of the concrete masonry under load show the possibility of the wide use of this most economical design of dams.The technology of level concreting used proved its effectiveness first of all by the record rate of increase of the dam in height of 7.7 m/month on average, with the maximally attained rate of 12 m/month.An analysis of the experience of constructing the Miatla dam permits the assertion that the level technology provides the absence of cracks at a high rate of constructing the dam (up to 12 m/month). The creation of a uniform temperature field over the height of the dam and over its horizontal sections in the level technology with covering times of not more than 7 days made it possible: to simplify the technology of temperature regulation and to ease the requirements imposed on the parameters of temperature regulation; to provide an increase of opening of the section joints to 5–7 mm, double that of the usual opening, which provides conditions for high-quality grouting of the section joints.The experience of organizing construction inspection at the Miatla dam showed: the effectiveness of additional expenditures on installing a large number of sensors under conditions of accelerated construction of the dam and with the development or mastering of new technology requiring research; the expediency of using methods of flexible regulation of the temperature regime of concrete allowing prompt maneuvering of the means providing it, which leads to a reduction of expenditures on the temperature regulating system; effectiveness of strict checking of the operation of the pipe cooling system providing high rates of cooling of the concrete masonry (on average 9°/month) and reducing the operating cost of the refrigeration station.Operating experience showed the considerable effect of means of intrablock mechanization on the rate and quality of constructing the structures. It is necessary, finally, to organize the industrial manufacture of light, small compacting machines, reliable effective manual vibrators and equipment for them, and also light, effective cranes for installing and dismantling the framework and reinforcement meshes in the blocks.The experience of constructing the Chirkey and Miatla dams showed the need for developing cableway equipment as the main mechanism in arch dam construction. A cableway makes it possible to begin works on preparing the bed of the structures as the pits are being excavated, to develop a maximum rate on concreting works, to create a single materials delivery front, and to optimize the technology with a unified load-carrying capacity.
Technology of constructing arch dams
Danilov, A. S. (author)
1988
Article (Journal)
English
BKL:
56.30
Wasserbau
Local classification TIB:
770/6550/8000
Technology of constructing arch dams
| Springer Verlag | 1988
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