Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Consideration of moisture effects on the upstream face of concrete dams
Conclusions Investigations of the saturation of concrete of the Sayano-Shushenskoe dam showed that during five years of operation of the structure moisture penetrated into the concrete to a depth of 4–6 m, and the maximum change in the moisture content of the concrete of the upstream face was 1.5%. The moisture-induced strains at a depth of 0.5 m from the upstream face reached a value of 4.5–5.5×$ 10^{−5} $ and at a distance of 4.5–5 m a value of 0.6–1.0× $ 10^{−5} $. The change both in the depth of penetration of moisture into the structure and in the degree of saturation occurred most intensely during the first 1–1.5 years after a rise of the head.Calculation of moisture-induced stresses on the basis of the data of on-site investigations of the moisture content and moisture-induced strains with the use of the physical and mechanical characteristics of concrete determined under laboratory and on-site conditions showed that compressive stresses, which reached 0.95–1.52 MPa, occurred on the upstream face of the dam. The width of the zone of compression is 3–4 m for concrete located below the seasonal drawdown of the reservoir and up to 2 m in the zone of the variable water level.Consideration of the additional compressive stresses on the upstream face of the Sayano-Shushenskoe dam during the 1982 flood made it possible to raise the elevation of filling the reservoir and to increase the production of electric energy by 127 million kWh.A generalization of the results of investigating saturation of concrete in the zone of the upstream face of the Sayano-Shushenskoe dam and also of the additional data obtained at the Krasnoyarsk and Zeya dams made it possible to establish a general regularity for determining stresses occurring on the upstream face of dams of various types due to swelling of concrete, which can be recommended for inclusion in SNiP 2.06.06-85 “Concrete and Reinforced-Concrete Dams.”
Consideration of moisture effects on the upstream face of concrete dams
Conclusions Investigations of the saturation of concrete of the Sayano-Shushenskoe dam showed that during five years of operation of the structure moisture penetrated into the concrete to a depth of 4–6 m, and the maximum change in the moisture content of the concrete of the upstream face was 1.5%. The moisture-induced strains at a depth of 0.5 m from the upstream face reached a value of 4.5–5.5×$ 10^{−5} $ and at a distance of 4.5–5 m a value of 0.6–1.0× $ 10^{−5} $. The change both in the depth of penetration of moisture into the structure and in the degree of saturation occurred most intensely during the first 1–1.5 years after a rise of the head.Calculation of moisture-induced stresses on the basis of the data of on-site investigations of the moisture content and moisture-induced strains with the use of the physical and mechanical characteristics of concrete determined under laboratory and on-site conditions showed that compressive stresses, which reached 0.95–1.52 MPa, occurred on the upstream face of the dam. The width of the zone of compression is 3–4 m for concrete located below the seasonal drawdown of the reservoir and up to 2 m in the zone of the variable water level.Consideration of the additional compressive stresses on the upstream face of the Sayano-Shushenskoe dam during the 1982 flood made it possible to raise the elevation of filling the reservoir and to increase the production of electric energy by 127 million kWh.A generalization of the results of investigating saturation of concrete in the zone of the upstream face of the Sayano-Shushenskoe dam and also of the additional data obtained at the Krasnoyarsk and Zeya dams made it possible to establish a general regularity for determining stresses occurring on the upstream face of dams of various types due to swelling of concrete, which can be recommended for inclusion in SNiP 2.06.06-85 “Concrete and Reinforced-Concrete Dams.”
Consideration of moisture effects on the upstream face of concrete dams
Sokolov, I. B. (Autor:in) / Rasskazchikov, V. A. (Autor:in)
1986
Aufsatz (Zeitschrift)
Englisch
BKL:
56.30
Wasserbau
Lokalklassifikation TIB:
770/6550/8000
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